TCAEY-THAEY 115Ã·238 - Rhoss

K20100EN ed.5 

TCAEY-THAEY 115÷238 

TXAEY 117 ÷133 

Compact-Y range 

Microsystem 

15,39÷38,80 kW 

16,84÷41,72 kW 

Air-cooled water chillers, heat pumps and polyvalent units with axial 

fans. 

Range with hermetic Scroll type compressors and R410A ecological 

refrigerant.

Contents 

Contents 

General ch aracteristics.....................................................4 

Intended c onditions of use ..................................................4 

New Compact-Y series......................................................5 

Energy-saving, reliable and versatile water chillers and 

heat pumps ............................................................................5 

Pol yvalent EXPSYSTEMS units in R410A for efficient 

energy us e.............................................................................5 

Guide to choosing a unit ..................................................6 

AdaptiveFunction...............................................................6 

AdaptiveFunction Plus .....................................................7 

TCAEY-THAEY 115÷238mod els......................................9 

Construction features Standard installation .....................9 

Potential i nstallati ons ...........................................................9 

Electrical panel ......................................................................9 

Option with STANDARD control ........................................9 

Option with c ompati ble 

contr ol.....................9 

TCAEY-THAEY 115÷238 accessories..........................10 

Factor y fitted access ories .................................................10 

Factor y fitted accessories with STANDARD control ....10 

Factor y fitted accessories with compatible 

control ...................................................................................10 

Accessories s upplied l oose...............................................10 

Accessories s upplied l oose wit h STANDARD control .10 

Accessories s upplied l oose wit h c ompati ble 

control ............................................................10 

TXAEY 117÷133 mod els..................................................11 

Construction features Standard installation ...................11 

Potential i nstallati ons .........................................................11 

EXP electrical board characteristics ................................11 

TXAEY 117÷133 accessories.........................................12 

Factor y fitted access ories .................................................12 

Accessories s upplied l oose...............................................12 

Technical dat a...................................................................13 

Energy efficienc y at partial loads - ESEER index .........21 

TXAEY operating principle ............................................22 

AUTOMATIC mode - multi-seas on..................................22 

SELECT mode - multi-season...........................................22 

Diagram of AUTOMATIC operating mode .....................22 

Diagram of SELECT operating mode...............................22 

Operati ng logic....................................................................23 

The competiti ve advantages of t he pol yvalent s ystem.23 

Applications of the polyv alent system.......................24 

2-pipe-s ystems ....................................................................24 

4-pipe s ys tems ....................................................................24 

Example of water circuit ....................................................24 

Electroni c controls for TCAEY THAEY 115÷233 

models.................................................................................25 

STANDARD control ...........................................................25 

KTR1 - Remote keypad for STANDARD control ..........25 

Compatible control .......................................26 

KTR – Remote keypad for compatible 

control ...................................................................................26 

Electronic c ontr ol for units133- 233 wit h accessories 

RC100 and DS15 ...............................................................27 

KTR - Remote keyboard for units 133-233 with 

accessories RC100 and DS15 .........................................27 

Electronic controls for TXAEY 117÷133 models......28 

Electronic c ontr ol ................................................................28 

KTR – Remote keyboard...................................................28 

Serial conn ection .............................................................29 

Serial connec tion for STANDARD control .....................29 

Supervision..........................................................................29 

Serial connec tion for c ompati ble contr ol ..29 

Supervision..........................................................................29 

KSC – Cloc k card ...............................................................29 

Performance ......................................................................30 

Choice of a chiller or heat pump and use of the 

perfor manc e tables .............................................................30 

Performance dat a for TCAEY-THAEY 115÷238 

models.................................................................................31 

RC100 and DS15 acc essories: performanc es and 

pressure drops ....................................................................34 

TCAEY-THAEY pr essur e drops and r esidual static 

pressur e .............................................................................35 

Performance dat a for TXAEY 117÷133 models........36 

TXAEY pressure drops and residual static pressure39 

Operating limits for TCAEY-THAEY models.............40 

Operating limits for TXAEY models 117÷133 ...........40 

Dimensions and footprints............................................41 

TCAEY – THAEY 115÷130 di mensions and footprints, 

P1 installation .....................................................................41 

Installation ...........................................................................41 

Weights ................................................................................41 

Clearances and positioning ..............................................41 

Movement............................................................................41 


ASP1 installation ................................................................42 

Installation ...........................................................................42 

Weights ................................................................................42 


Movement............................................................................42 


Standard, P1 – P2, ASP1 – ASP2 installation ..............43 

Installation ...........................................................................43 

Weights ................................................................................43 


Movement............................................................................43 


with D S15/RC100 acc essories ........................................44 

Installation ...........................................................................44 

Weights ................................................................................44 


Movement............................................................................44 

TCAEY – THAEY 238 installation dimensions and 

footprints ..............................................................................45 

Installation ...........................................................................45 

Weights ................................................................................45 


Movement............................................................................45 

TXAEY 117÷130 di mensions and footprints, P1 

installation ...........................................................................46 

Installation ...........................................................................46 

Weights ................................................................................46 


Movement............................................................................46 

TXAEY 133 di mensions and footprints, Standard, P1 – 

P2, ASP1 – ASP2 ins tallati on ..........................................47 

Installation ...........................................................................47 

Weights ................................................................................47 


Movement............................................................................47 

W ater connections ..........................................................48 

Connection to the s ystem .................................................48 

Pump ins tallation................................................................48 

Tank & Pump installation ..................................................48 

Minimum water circuit content TCAEY-THAEY ............48 

Minimum water circuit content TXAEY ...........................48 

Maxi mum water circuit content ........................................49 

Water data...........................................................................49 

Expansion tank technic al data .........................................49 

Use of anti-freez e solutions ..........................................49 

W ater circuits in TC AEY-THAEY models with 

STANDARD electronic control.....................................50 

W ater circuits in TC AEY-THAEY models with 

electronic control ......................................51 

W ater circuits in T XAEY mod els..................................52 

TCAEY-THAEY electric connections with 

STANDARD control.........................................................53 

TCAEY-THAEY electric connections with 

compatible 

control....................................55 

Electric connections in TXAEY models.....................57 

3


general characteristics 

General characteristics 

Intended conditions of use 

TCAEY units ar e air-cooled pac kaged water 

chillers with air cooling and axial fans. 

THAEY units ar e pac kaged air-cooled 

reversible heat- pumps on the refrigerant c ycle 

and axial f ans . 

They ar e int ended for use i n conditioning plants 

or indus trial proc esses where a suppl y of c hilled 

water (TCAEY) or c hilled and hot water 

(THAEY), is required. Not suitable for drinking 

wat er. 

The units are designed for outdoor 

install ation. 

The TXAEY units are air-cooled polyvalent units 

with full heat recovery. 

They ar e int ended for use i n air conditi oning or 

industrial process applications where, in any 

season, t here is the requirement f or chilled 

wat er or heated wat er, simultaneousl y or 

independentl y, in s ystems wit h 2 or 4 pipes, 

which are not for domes tic water or direct 

consumption. 

The units are designed for outdoor 

install ation. 

The units c omply wit h t he following directi ves: 

○ Machiner y Directi ve 98/37/EC (MD); 

○ Low volt age Directi ve 2006/ 95/ EC (LVD); 

○ Electromagnetic Compatibility Directive 

89/ 336/EEC (EMC); 

○ Pressure Equipment Directive 97/ 23/ EEC 

(PED). 

Guide to reading the cod e 

"SERIES" code 

"MODEL" code 

T C A E Y 1-2 15÷38 

Cooling onl y 

Wat er 

produc tion 

unit 

H 

Heat pump 

X 

Pol yvalent 

unit 

Air-cooled 

Scroll-type 

hermetic 

compressors 

R410A 

refrigerant 

fluid 

No. compressors 

Approxi mat e 

cooling capacity 

(in kW) 

Possibl e in stall ations for TCAEY-THAEY 115÷238 mod els: 

Standard: 

Installation wit hout pump (onl y available for models 133, 233 and 238). 

Pump: 

P1 – Ins tallation with pump. 

P2 – Ins tallation with increas ed static pressur e pump (only available for models 133, 233 and 238). 

Tank & Pump: 

ASP 1 – Ins tallati on with pump and water buffer tank. 

ASP 2 – Ins tallati on with increased static press ure pump and wat er buffer t ank ( onl y availabl e f or models 133, 233 and 238). 

Possibl e in stall ations for TXAEY 117÷133 models: 

Standard: 

Installation wit hout pump (onl y available for model 133). 

Pump: 

P1 – Ins tallation with pump on pri mar y circuit. 

P2 – Ins tallation with pump with i ncreas ed st atic pressure on primary circuit for model 133 (available as f actor y fit ted acc essor y). 

Tank & Pump: 

ASP1 – I nstallation with pump on primar y circuit and water buffer tank (only available for model 133). 

ASP 2 – Ins tallati on with increased static press ure on pri mar y circuit pump and wat er buffer t ank for model 133 (available as a 

factor y fitted accessor y). 

Exampl e: TCAEY 124 ASP1 

o Cold water only unit; 

o Air-cooled; 

○ 1 x Scroll hermetic compressor; 

○ R410A refrigerant; 

○ Nominal cooling c apacit y of approxi mat ely 24 kW. 

○ With pump and wat er buff er tank. 

4



New Compact-Y series 

Energy-saving, reliable and versatile water chillers and 

heat pumps 

A comp lete, flexible ser ies 

Nine new water chillers and heat pumps from 15 to 38 kW in R410A, 

which can be fitt ed wit h t he i nnovati ve AdaptiveFunction Plus control 

logic developed by RHOSS S.p.A. in partnership wit h t he U niversity of 

Padua, to obtain optimal comfort levels in all wor king conditions and the 

best possibl e performanc e in ter ms of energy efficienc y during seas onal 

operation. 

AdaptiveFunction Plu s provi des a comf ort and energy s aving 

guarant ee! 

LOW ENERGY CONSUMPTION water chillers and heat pumps 

The AdaptiveFunction Plu s “Economy” function combines c omfort 

with l ow energy c ons umption. I n f act, by adjusti ng the set-point value, it 

opti mises compressor operation on the basis of t he actual wor king 

conditi ons. 

It is thus possible to achi eve significant s easonal energy savi ngs 

compared to water chillers and heat pumps of an equivalent power with 

traditional control logic. 

HIGH PRECISION water chillers and h eat pumps 

By using t he AdaptiveFunction Plus “Pr eci sion” function, it is possi ble 

to ac hieve as littl e fluct uation as possibl e, at partial capacities , in terms 

of t he average s et-point water t emperature deli vered t o t he users. 

Guaranteed rel iabil it y, even with water in the pipes onl y 

Thanks to the “Virtual T ank” f uncti on, Compac t-Y units with 

AdaptiveFunction Plu s can operate i n s ystems wit h a low wat er 

cont ent of down to 2 litres/ kW, even without the pres enc e of a water 

buffer tank, whilst still guaranteeing the reliability and good working 

order of the unit over ti me. 

Estimation of the syst em's therm al inertia 

Compact-Y units wit h AdaptiveFunction Plus are abl e t o esti mate t he 

charact eristics of t he thermal i nertia that regulates t he s ystem 

dynamics. T his is possi ble t hanks t o t he " ACM Autotuning” functi on, 

which proc esses the inf ormation relati ve to the progress of t he water 

temperatures, identif ying the opti mal value of the control paramet ers. 

Continuous system autodiagnosis 

The es timation function is al ways acti ve and makes it possibl e t o adapt 

the c ontr ol par ameters quic kl y t o every change in the wat er circuit and 

thus i n the s ystem water contents. 

Polyvalent EXPSYSTEMS units in R410A for efficient energy 

use 

Efficient en erg y u se 

EXPS YSTE MS is a lat est generation pol yval ent ecol ogical syst em, 

designed by RHOSS S.p.A. to offer c ooling, heati ng and hot water 

simultaneousl y or independently at any time of year, whilst 

guarant eeing efficient energy usage. Energy s avings are very high, with 

COP values of over 6 during the simultaneous production of chilled and 

hot water. 

With EXP SYST EMS , EFFICIENCY, RELIABILITY AND VERSATILITY ar e 

guarant eed, whilst offering great er environmental protec tion. 

Polyvalent units for residential and light commercial applications 

Four new units from 17 t o 34 kW in R 410A, able to c at er for t he t ypical 

demands of 2 and 4-pipe s ystems i n a flexible fas hion, so much s o in 

fact that they can be used in existing s ystems without any modific ations. 

They come compl ete wit h a wi de range of acc essories, which c an also 

be s upplied f actor y fitted. 

5



Guide to choosing a unit 

Thanks to the wi de range of versions and cons truction options, t he new 

Compact-Y s eries is able t o meet a wi de r ange of design and s ys tem 

requirements: s yst ems target ed at energy savi ng, precision 

requirements f or process applicati ons or the need t o be able t o s uppl y 

hot water t oo. 

On t he basis of your requirements, t he following diagram makes it 

possible to s elect the unit t hat best meets t hem. I t als o provi des f urther 

information on AdaptiveFunction Plu s and AdaptiveFunction 

adapti ve l ogics relative t o t he diff erent versions in t he range. 

TCAEY-THAEY 

115238 

Standard cooling or 

heating applications 

Energy-saving 

applications 

Precision applications 

(recommended set-up 

ASP1-ASP2) 

Energy-saving 

applications wit h hot 

wat er producti on. 

(*) for the secondary circuit ref er to page 48. 

AdaptiveFunction 

TCAEY-THAEY 115÷133 with STANDARD control 

TXAEY 117÷133 with control 

The AdaptiveFunction control logic makes it possible to adapt the 

chiller/heat pump oper ating paramet ers to the wor king conditions of the 

system in which it is installed, wor king parti ally as a water buffer tank 

simulator. This makes it possibl e to reduces the litres/kW of the system 

itself, guaranteeing compr essor safety and the reliability of the machine 

over time. Approximatel y 4 litr es/ kW are required in a s yst em fitted with 

a chiller with AdaptiveFunction adapti ve c ontrol and at least 10 

litres/kW in a system fitted with a chiller without adaptive control. 

However, it is evident t hat in process applications where more accurate 

wat er temperat ure c ontrol is required, it is always preferable to use a 

wat er buff er tank or a great er sys tem wat er content, which guar ant ees 

high sys tem t hermal inerti a. 

6



AdaptiveFunction Plus 

TCAEY-THAEY 115÷238 with control 

The new AdaptiveFunction Plus adaptive regulation has been 

excl usivel y patent ed by RHOSS S.p.A. It is the result of a long 

partnership with the University of Padua. The various algorithm 

devel opment operations were i mplement ed and validated on units in the 

Compact-Y range in the RHOSS S.p.A. R esearc h&Dev elopment 

Laborat ory using numerous tes t campaigns. 

Objectives 

• To guarantee optimal unit operation in the system in which it is 

installed. Evolved adaptive logic. 

• To obtain the best performance from a chiller in terms of energy 

efficienc y at full and partial c apacities. Low consumption chiller. 

Operating logic 

In general, the actual control logics on water chillers/heat pumps do not 

consider the characteristics of t he s ys tem in which t he units are 

installed; they usuall y regul ate the ret urn wat er temperat ure and are 

positioned so as to ensure the operation of the chillers, giving less 

priority to the s ys tem requirements. 

The new AdaptiveFunction Plus adaptive logic counters these logics 

with the objective of optimising the chiller operation on the basis of the 

syst em char acteristics and the ef fecti ve t hermal load. T he c ontr oller 

regulates t he deli ver y water t emperature and adjusts itself, as and when 

required, to the relative oper ating conditions usi ng: 

• the i nfor mation c ont ained in the ret urn and deli ver y water 

temperature to estimate the wor king conditions t hanks t o a c ertain 

mathematical formula; 

• a special adapti ve algorithm that us es this esti mate to vary the 

val ues and t he st art-up and s witch- off limit values of t he c ompressors; 

the opti mised compress or start-up management guar ant ees a pr ecision 

wat er suppl y t o t he user, reduci ng the fluct uati on around the set- point 

val ue. 

Main functions 

Efficiency or Precision 

Thanks to the evolved control, it is possible to run the chiller on two 

different regulation s etti ngs to obt ain t he bes t possible performance in 

terms of energ y ef ficienc y and considerable seas onal savings, or high 

wat er delivery temperat ure precision: 

1. Low consumption chiller: Economy” option 

It is well known that chillers wor k at full capacity for just a ver y small 

percentage of t heir operating time, while they wor k at partial capacit y 

for most of t he s eas on. Therefore, the power t hey need to s upply 

generally diff ers from t he nominal design power, and oper ation at 

partial capacit y has a notic eable effec t on seasonal energy 

perfor manc e and consumpti on. 

This makes it nec essar y t o run the unit s o t hat it is as efficient as 

possible at partial c apacit y. T he c ontr oller therefore ensures that t he 

wat er delivery temperat ure is as high as possible ( when operating as 

a chiller) or as low as possible (when operating as a heat pump) 

whilst c ompati ble with the t hermal loads, meani ng that it is on a 

sliding scale, unlike in traditi onal s ystems. T his prevents energy 

wast age linked t o t he mai ntenance of pointlessl y onerous 

temperature levels for the chiller, ensuring that the ratio between the 

power t o be supplied and the energy to be us ed t o produce it is 

always at an optimum level. Fi nall y t he right level of comfort is 

availabl e to everyone! 

Summer season: a unit that oper ates wit h a 

sliding set-point enables s easonal energy 

savi ngs of around 8% c ompared t o a traditi onal 

unit t hat operat es with a fi xed s et-point. 

W inter season: a unit that operates wit h a 

sliding set-point enables s easonal energy 

savi ngs of around 13% compared to a 

traditional unit t hat operat es with a fi xed s etpoint 

. Calculations carried out demonstrate that 

seasonal c ons umption is equi val ent to that of a 

CLASS A mac hine. 

Annual: efficienc y over the annual operation of 

the unit i n heat pump mode. 

AdaptiveFunction Plu s, with the “Economy” 

function, enables the chiller assembly to 

operate energy-saving programmes whilst still 

providing the required level of service. 

Y 

900 

800 

700 

600 

500 

400 

300 

200 

100 

0 

3 4 5 6 

X 

7 8 9 10 

Y 

1600 

1400 

1200 

1000 

800 

600 

400 

200 

0 

9 10 11 12 1 2 3 

X 

4 

Y 

6,0 

5,5 

5,0 

4,5 

4,0 

3,5 

3,0 

2,5 

2,0 1 2 3 4 5 6 7 8 9 10 11 12 

X 

X 

Y 

Year divi ded int o months 

(1 Januar y, 2 Februar y, etc.). 

Energy cons umption ( kWh). 

Unit with fi xed Set-point 

Unit with sliding Set-point 

X 

Y 



Energy cons umption ( kWh). 



X 

Y 



Energy efficienc y 

kWh s upplied / kWh absorbed. 



Analysis performed by comparing the operation of a Compact-Y heat pump unit with AdaptiveFunction Plus logic that operates with a fixed set-point (7°C in the summer and 

45°C in the winter) or with a sliding set-point (range between 7 and 14 °C in the summer, range between 35 and 45°C in the winter) for an office building in Milan. 

7



2. High precision: “Precision” option 

In t his operating mode, the unit wor ks at a fi xed set-point and, thanks to t he delivery water t emper ature control and the evolved regulation logic, at a 

capacit y of between 50% and 100% it is possible t o guar ant ee an aver age fluct uati on from the wat er suppl y t emperature of approximatel y ± 1.5° C 

from t he set-point value compared to an average fluct uation over ti me of approximatel y ± 3°C, which is normall y obt ained with s tandar d ret urn control. 

The “Pr eci sion” option thus guarantees precision and reliability for all those applications that require a regulator that guar antees a more accur ate 

const ant water s upply temperat ure, and wher e there are particular damp c ontr ol requirements . However, in process applications it is always 

advisable t o us e a wat er buffer t ank or a greater s yst em wat er content t o guarantee higher s ystem t her mal inertia. 

s 

FC 

s 

FC 

fluctuation 

capacit y 

Unit with water buffer tank, 4 litres/kW i n the s ys tem and 

return control. 

Unit with water buffer tank, 2 litres/kW i n the s ys tem and 

deliver y control with “Precision” AdaptiveFunction Plu s 

function 

The chart illustrates the fluctuations of the water temperature from the set value for the various capacities, demonstrating how a unit with delivery control and the 

AdaptiveFunc tion Plus “Precision” function guarantees greater water supply temperature precision. 

Virtual Tank: guaranteed reliability, even with water in the pipes only 

A low water content in the system can cause the chiller units/heat pumps to be unreliable and can generate system instability and l ac k of perfor mance. 

Thanks to the Virtual Tank function, t his is no longer a problem. T he unit can operat e in s ystems with just 2 litr es/ kW in the pipes given t hat the control 

is able to c ompensat e f or the l ac k of inerti a specific to a water buffer tank, " muffling" the control signal, preventing the compressor from s witchi ng on 

and off in an unti mel y f ashi on and reducing the average fl uctuation of t he s et-poi nt value. 

T 

14 

12 

10 

8 

6 

4 

T1 

T 

t 

T1 

Wat er temperat ure (°C) 

Time (s) 

Set-point t emper ature 

Deliver y t emperature wit h Virtual Tank 

Deliver y t emperature wit hout Virtual Tank 

2 

0 

2000 

3000 4000 5000 6000 7000 8000 9000 

t 

The chart shows the various chiller outlet temperatures considering capacity of 80%. We can observe how the temperatures of the unit with AdaptiveFunction Plus l ogic 

and the Virtual Tank function is far less varied and more stable over time, with average temperatures closer to the working set-point compared to a unit without the Virtual 

Tank function. Moreover, we can see how the unit with AdaptiveFunction Plus logic and the Virtual Tank function switches the compressor on less often over the same 

period of time, with obvious advantages in terms of energy consumption and system reliability. 

ACM Autotuning compressor management 

AdaptiveFunction Plu s enables t he C ompact-Y units t o adapt t o t he s yst em they are ser ving, s o as to always identif y the best c ompressor operating 

paramet ers in t he diff erent worki ng conditions . 

During the initi al operating phases, the special “Autotuning” functi on enables the Compact-Y unit with Ad aptiveFunction Plus to esti mate the thermal 

inertia charact eristics that regulat e t he s ys tem dynamics. T he f unc tion, which is aut omaticall y acti vat ed when t he unit is s witc hed on for the first ti me, 

executes a number of s et oper ating c ycles, during which it proc esses the inf ormation r elati ve to the wat er temperat ures. I t is thus possible to esti mat e 

the physical c harac teristics of the s yst em and t o identif y the opti mal val ue of t he par ameters t o be used f or the control. 

At the end of this initi al auto-es timate phase, the “Autotuning” func tion r emains acti ve, making it possible t o adapt the control paramet ers quickl y t o 

ever y change in the wat er circuit and thus in the s ystem water cont ents. 

8


construction features 

TCAEY-THAEY 115÷238models 

Construction features 

Standard installation 

○ Load-bearing structure and panels in 

galvanised and painted sheet steel (RAL 9018); 

base in gal vanised s heet s teel. 

○ Hermetic, Scroll-type rotar y compressors, 

complete wit h internal thermal prot ection and 

crankcase heat er (for models 127÷238) 

activat ed aut omaticall y when the unit st ops (as 

long as t he power s uppl y to the unit is 

preser ved). 

○ Wat er side, braz e welded plat e heat 

exchanger in stainless steel, compl ete with 

antifreeze electric heat er and s uitabl y insul ated. 

○ Air side heat exc hanger c omprised of a coil 

of copper pipes and aluminium fi ns. 

○ Double electric axial fan with ext ernal rotor, 

equipped with inter nal t her mal pr otecti on and 

complete with protection grille for models 

115÷130, 238 and indi vidual f an for models 

133-233. 

○ Male threaded water c onnections. 

○ Differential pressur e s witch t hat protects the 

unit from any i nterruptions to the water flow. 

○ Refrigerant circuit made from annealed 

copper pipi ng (EN 12735-1-2) complete wit h: 

drier filter, charge connecti ons, saf et y pressure 

switch on the high pressure side, press ure 

switch on the low pressure si de, safety valve 

(for models 127÷238), thermos tatic expansion 

val ve ( 2 for THAEY, 3 for models 133-238), 

cycle i nversion val ve (for THAEY), liquid 

receiver (for THAEY) and chec k valves (2 for 

THAEY), and gas s eparator (for models 133- 

238). 

○ Unit wit h IP24 level of protec tion. 

○ Possibility to select two controls: 

• STANDARD, with Adaptive Function; 

• compati ble with Adaptive 

Function Plus. 

○ The unit is complete with the R410A 

refrigerant charge. 

Potential installations 

Standard – Installation without pump (onl y 

availabl e for models 133, 233 and 238). 

Pump P1 – I nstallation wit h pump. 

Pump P2 – I nstallation wit h increased st atic 

pressure pump (onl y availabl e f or models 133, 

233 and 238) (availabl e as a f act ory fitted 

accessor y). 

Tank & Pump ASP1 – I nstallation wit h pump 

and water buf fer t ank. The inertial water buf fer 

tank is i nstalled on t he water circuit deli ver y 

pipe. 

Tank & Pump ASP2 – I nstallation wit h 

increased st atic press ure pump and wat er 

buff er tank (only available for models 133, 233 

and 238) (available as a fac tor y fitt ed 

accessor y). The inertial water buffer tank is 

installed on the wat er circuit deliver y pipe. 

Electrical panel 

Option with STANDARD control 

○ Electrical board accessibl e by openi ng the 

front panel, c onf orming with c urrent IEC 

standards, and whic h can be opened and 

closed wit h a s uitable t ool. 

○ Compl ete with: 

• electrical wiring arranged f or power suppl y 

400-3ph+N-50Hz; 

• auxiliary power supply 230V-1ph-50Hz 

drawn from t he main power s upply; 

• general isolator, c omplet e with door 

interloc king isolat or; 

• aut omatic compr essor protecti on s witc h; 

• protection fuse for auxiliar y circuit; 

• compressor power contactor; 

• anti-distur banc e net wor k filter; 

• compressor pr otecti on phase s equence 

monitor; 

• unit protec tion against l ac k of a power 

suppl y phase; 

• transfor mer f or elec tronic c ontrol; 

• user int erface ter minal board; 

• remot e unit c ontrol. 

○ Programmable elec tronic boar d with 

microproc essor, c ontrolled by the keypad 

inserted in t he machine. 

○ This electronic board performs t he following 

functi ons: 

• Regulation and management of t he inl et 

wat er temperat ure s et points ; of c ycle reversal 

(THAEY); of the safety ti mer delays ; of the 

circulating pump; of the compr essor and s ystem 

pump hour-run meter; of temperat ure defrost 

cycles (THAEY); of the electronic anti-freeze 

protecti on which cuts in aut omatic ally when the 

mac hine is s witc hed of f; and of the f uncti ons 

which control t he operation of the indi vidual 

parts making up t he machine; 

• complete protection of the unit, automatic 

emergenc y shutdown and dis play of t he alarms 

which have been acti vat ed; 

• visual indic ation of the pr ogrammed set 

points via t he display; of the in/ out wat er 

temperature vi a the display; of the alar ms via 

the display; and of c ooling/heat-pump operating 

mode via led (THAEY); 

• self-diagnosis with continuous monit oring of 

the func tioni ng of t he unit ; 

• user int erface menu; 

• alarm c ode and descripti on; 

○ Advanced functions: 

• set up for serial connection (KIS and 

KRS232/KUSB acc essor y); 

• chec k-up and monitoring of scheduled 

maintenanc e st atus ; 

• testing of the units assisted by computer; 



• with Ad aptive Fun ction. 

Option with compatible 

control 







400-3ph+N-50Hz; 








• remot e unit c ontrol. 





functi ons: 

• Regulation and management of t he outl et 

wat er temperat ure s et points ; of c ycle reversal 

(THAEY); of the safety ti mer delays ; of the 

circulating pump; of the compr essor and s ystem 

pump hour-run meter; of the el ectronic antifreeze 

prot ection which c uts i n automaticall y 

when the machine is s witched off ; and of the 

functi ons whic h control t he operation of t he 

indivi dual parts making up the mac hine; 





monitor; 

• unit protec tion against l ow or high phase 

power suppl y voltage; 


points on the dis play; of the inlet /outlet water 



mode via LEDs (for THAEY models); 





• alarm histor y management (menu 

protect ed by manuf act urer password). 

○ The f ollowi ng is memorised f or each alarm: 

• dat e and time of inter venti on (if t he KSC 

accessor y is present); 


• inlet/outlet wat er temperatur es when t he 

alarm inter vened; 

• alarm delay time from t he s witc h-on of the 

connected device; 

• compressor st atus at moment of alarm; 


• configured for s erial connec tion (KR S485, 

KFTT10, KRS232 and KUSB acc essor y); 

• possibility to have a digital input for remote 

management of the double s et point (contact 

RHOSS S.p.A. pre-sales ). 

• possibility to have an analogue input for the 

scrolling set-point via a 4-20mA remote signal 

(contact RHOSS S.p.A. pre-sales ); 

• configured for management of ti me bands 

and operation parameters with the possibility of 

daily/weekl y operating programs (KSC 

accessor y); 





the func tioni ng of t he unit . 

○ Set-point regulation via t he 

AdaptiveFunction Plu s with two options: 

• fixed s et-poi nt (Pr eci sion options); 

• scrolling set-point (Economy opti on). 

9



accessories 

Factory fitted accessories 

P2 – Ins tallation with increas ed static pressur e 

pump (onl y available for models 133, 233 and 

238). 

ASP 2 – Ins tallati on with increased static 

pressure pump and water buff er tank (only 

availabl e for models 133, 233 and 238). 

RAA – water buffer tank antifreeze electric 

heater (90 W for models 115÷130, 300 W f or 

models 133÷238) (available for inst allations 

ASP1 – ASP2). 

RPB – Coil protection net wor ks. 

RCC – Compressor crankcase heat er (70 W f or 

models 115-117, 90 W for models 122-124). 


with STANDARD control 

FI10 1 – Proportional el ectronic devic e for the 

pressurised and c ontinuous regulation of the 

fan rotati on s peed down to an ext ernal air 

temperature of -10°C when operating as a 

chiller and up to an external air temperature of 

40°C when operating as a heat pump (for 

models with STANDARD electronic c ontr ol ). 


with compatible 

control 

FI10 – Proportional electronic device f or the 





40°C when operating as a heat pump. 

DS15 – Des uper heater c omplet e with 

antifreeze electric heat er and c ondensati on 

control (FI10 f or models 133-233). 

RC100 – Heat recover y unit with 100% heat 

recover y, c omplet e with antifreeze elec tric 

heater and c ondensati on c ontr ol (FI10 for 

models 133-233). 

DSP – D oubl e set-point via digital cons ens us 

(not compatibl e with the CS acc essor y), onl y f or 

models with c ompatible 

control 

and Precision option. Handled as a s peci al 

accessor y by our pre-sal es office. 

CS – Scrolling set-point via 4-20 mA analogue 

signal (incompatibl e with the DSP access ory), 

onl y f or models wit h compatibl e 

control and Pr eci sion option. H andl ed as a 

special accessor y by our pre-sal es office. 

Accessories supplied loose 

KSA – Anti-vibr ation supports . 

KRPB – Coil prot ection net wor ks. 

KRS232 – RS485/RS232 serial converter for 

interconnec tion between RS485 serial net wor k 

and super vision s yst ems with s erial connec tion 

to PC via RS232 s erial port (RS232 c able 

provided). 

KUSB – RS485/USB serial c onverter f or 



to PC via USB port (USB cable pr ovided). 


with STANDARD control 

KTR1 – Remote keypad for remote control, with 

the s ame f uncti ons as t he one built int o t he unit. 

KFI 1 – Proportional elec tronic device for t he 






KIS – RS485 serial interfac e f or logical dial ogue 

with buildi ng aut omation and super vision 

syst ems (supported pr otoc ols: propriet ary 

protoc ol; ModBus ® RTU). 

accessori es 


with compatible 

control 

KTR – Remote keypad for c ontrol at a dist anc e 

with r ear illuminated LCD display (same 

functi ons as t he one built int o t he mac hine). 

KFI – Proportional electronic device f or the 






KSC – Cloc k car d to displ ay date/time and to 

regulate t he machine with dail y/ weekl y 

start/stop time bands, with the possibility to 

change the set- points . 

KRS485 – RS485 serial interfac e c ard t o create 

dialogue networks bet ween c ards (maximum of 

200 units at a maxi mum distanc e of 1,000) and 

building automation, external super vision 

systems or RHOSS S.p.A. supervision systems 

(supported prot ocols: proprietar y protoc ol; 

Modbus ® RTU). 

KFTT10 – FTT10 serial i nterface card for 

connection t o super vision s ystems (LonWor ks ® 

syst em compliant with Lonmar k ® 8090-10 

protocol with chiller profile). 

KISI – C AN bus serial int erfac e (Contr oller Area 

Network compatible wit h evol ved hydronic 

system 

for integrated c omfort 

management (prot ocol s upported CanOpen®). 

KMDM – GSM 900-1800 modem kit to be 

connected t o t he unit or t he management of t he 

paramet ers and any alarm signals on a remote 

basis. The kit c onsists of a G SM modem wit h 

relative RS232 card. It is nec essar y t o purchas e 

a SIM dat a card, not s upplied by RHOSS S.p.A. 

KRS – RHOSS S.p.A. s upervision s oftware for 

unit monitoring and remote management. The 

kit c onsists of a CD-Rom and hardware key. 

10

TXAEY 117÷133 

construction features 

TXAEY 117÷133 models 

Construction features 

Standard installation 

○ RHOSS S.p.A. patented polyvalent system 

Italian. 

○ Load-bearing structure in gal vanised and 

RAL 9018 painted sheet steel, coated on the 

inside with sound-absorbi ng material, di vided 

into: 

• sound-proofed tec hnic al compartment for 

housi ng the compress ors, the electrical board 

and the main c omponents i n the refrigerant 

circuit. 

• aeraulic c ompartment f or housing t he heat 

exc hange coils, the motor-dri ven f ans and the 

pump assembl y access ory if pres ent . 

○ Hermetic, Scroll-type rotar y compressors, 

complete wit h internal thermal prot ection and 

crankcase heat er acti vated automaticall y when 

the unit s tops (as long as t he power suppl y t o 

the unit is preser ved). 

○ Double electric axial fan with ext ernal rotor, 

equipped with inter nal t her mal pr otecti on and 

complete with protection grille for models 

117÷130 and indivi dual fan for models 133. 

○ Proportional electronic device f or the 






○ Stainless steel plate heat exchangers on t he 

primar y and s econdary water circuits, compl ete 

with cl osed cell pol yuret hane foam rubber 

insulation and antifreez e el ectric heat ers. 

○ Differential pressur e s witch on all heat 

exchangers. 

○ Air side exc hanger comprised of a c opper 

pipe c oil flared int o al umini um fins wit h 

"corrugated" design in order to incr ease heat 

exchange efficiency. 

○ Male threaded water c onnections. 

○ Refrigerant circuit realised with annealed 

copper pipi ng (EN 12735-1-2) and wel ded with 

silver alloy. Complete with 2 cycle inversion 

val ves, c harge connections, high and low 

pressure s witc h, 2 thermostatic val ves for 

models 117-130 and 2 f or models 133, 4 

solenoid val ves, a drier filter, 2 liquid rec ei vers, 

a gas separat e, a humidit y indicat or, 3 nonreturn 

valves and a s afet y val ve (for models 

130-133). 

○ Primar y and s econdary water circuit made 

from anneal ed c opper piping (EN 12735-1-2) 

and welded with silver alloy. The primar y water 

circuit also comes compl ete with: 

pump, s af et y val ve (3 bar), press ure gauge, 

expansion tank, manual bleed val ves and 

drainage val ves. 

○ Secondary water circuit made from 

annealed c opper pi ping (EN 12735-1-2) and 

welded with sil ver alloy, compl ete with 

differential pressure s witc h. 

○ Compatible control with 

AdaptiveFunction on t he primar y circuit 

regulation. 

○ Unit wit h IP24 level of protec tion. 

○ The unit is complete with the R410A 

refrigerant charge. 

Potential installations 

Standard – Installation without pump (onl y 

availabl e for model 133). 

Pump P1 – I nstallation wit h pump on primar y 

circuit. 

Pump P2 – I nstallation wit h pump wit h 

increased st atic press ure on primar y circuit for 

model 133 (available as fac tor y fitt ed 

accessor y). 

Tank & Pump ASP1 – Installation with pump on 

primary circuit and water buffer tank (onl y 

available for model 133). T he inertial wat er 

buff er tank is inst alled on the water circuit 

deliver y pipe. 

Tank & Pump ASP2 – I nstallation wit h 

increased st atic press ure on primar y circuit 

pump and wat er buffer t ank for model 133 

(available as a fac tor y fitt ed acc essor y). The 

inertial wat er buffer t ank is install ed on the 

wat er circuit delivery pipe. 

EXP electrical board characteristics 







400V-3ph+N-50Hz 






• aut omatic pump protec tion s witc h (only 

availabl e for model 133); 



• pump power c ont actor (onl y availabl e for 

model 133); 

• unit remote c ontrols. 





functi ons: 

• regulation and management of the s et points 

for inlet water temper ature; cycle inversion; 

safet y timer del ays; circulati ng pump; 

compressor and system pump hour-run meter; 

of press ure defros t c ycles; electr onic anti-freez e 

protecti on which cuts in aut omatic ally when the 

mac hine is s witc hed of f; and the f uncti ons 

which control t he operation of the indi vidual 

parts making up t he machine; 





monitor 

• unit protec tion against l ow or high phase 

power suppl y voltage; 


points via t he display; of the in/ out wat er 



mode via displ ay; 




• alarm c ode and description; 

• alarm histor y management (menu protec ted 

by manufac turer pass word). 

The f ollowi ng is memorised f or each alarm: 

• dat e and time of inter venti on (if t he KSC 

accessor y is present); 

• alarm c ode and description; 

• inlet/outlet wat er temperatur es when t he 

alarm inter vened; 

• alarm delay time from t he s witc h-on of the 

connected device; 

• compressor st atus at moment of alarm; 


• configured for s erial connec tion (KR S485, 

KFTT10, KRS232 and KUSB acc essor y); 

• possibility to have a digital input for remote 

management of the double Set- point (cont act 

RHOSS S.p.A. pre-sales ). 

• possibility to have an analogue input for the 

scrolling set-point via a 4-20mA remote signal 

(contact RHOSS S.p.A. pre-sales ); 

• configured for management of ti me bands 

and operation parameters with the possibility of 

daily/weekl y operating programs (KSC 

accessor y); 






○ Adaptive Function on the r egulation of the 

primar y circuit. 

11

TXAEY 117÷133 

accessories 

TXAEY 117÷133 accessories 


P2 – Ins tallation with pump with i ncreas ed static 

pressure on primar y circuit for model 133. 

ASP 2 – Ins tallati on with increased static 

pressure on primar y circuit pump and water 

buff er tank f or model 133. 

RAA – water buffer tank antifreeze electric 

heater (90 W for models 117÷130, 300 W f or 

models 133) (available for ins tallati ons ASP1 – 

ASP2). 

RPB – Coil protection net wor ks. 

DSP – D oubl e set-point by means of digital 

consensus (inc ompatible with the CS 

accessor y). Handled as a s peci al acc essor y by 

our pre-sal es office. 

CS – Scrolling set-point by means of the 4- 20 

mA analogue s ys tem (incompatibl e with t he 

DSP acc essor y). handled as a special 

accessor y by our pre-sal es office. 


KSA – Anti-vibr ation supports . 

KRPB – Coil prot ection net wor ks. 

KTR – Remote keypad for c ontrol at a dist anc e 

with r ear illuminated LCD display (same 

functi ons as t he one built int o t he mac hine). 

KSC – Cloc k car d to displ ay date/time and to 

regulate t he machine with dail y/ weekl y 

start/stop time bands, with the possibility to 

change the set- points . 

KRS485 – RS485 serial interfac e c ard t o create 

dialogue networks bet ween c ards (maximum of 

200 units at a maxi mum distanc e of 1,000) and 

building automation, external super vision 

systems or RHOSS S.p.A. supervision systems 

(supported prot ocols: proprietar y protoc ol; 

Modbus ® RTU). 

KFTT10 – FTT10 serial i nterface card for 

connection t o super vision s ystems (LonWor ks ® 

syst em compliant with Lonmar k ® 8090-10 

protocol with chiller profile). 

KISI – C AN bus serial int erfac e (Contr oller Area 

Network compatible wit h evol ved hydronic 

system 

for integrated c omfort 

management (protocol s upported C anO pen ® ). 

KRS232 – RS485/RS232 serial c onverter for 



to PC via RS232 s erial port (RS232 c able 

provided). 

KUSB – RS485/USB s erial converter f or 



to PC via USB port (USB cable pr ovided). 

KMDM – GSM 900-1800 modem kit to be 

connected t o t he unit or t he management of t he 

paramet ers and any alarm signals on a remote 

basis. The kit c onsists of a G SM modem wit h 

relative RS232 card. It is nec essar y t o purchas e 

a SIM dat a card, not s upplied by RHOSS 

S.p.A. 

KRS – RHOSS S.p.A. s upervision s oftware for 

unit monitoring and remote management. The 

kit c onsists of a CD-Rom and hardware key. 

12

TCAEY 115÷130 

technical data 

Technical data 

Table “A”: Technical data 

TCAEY mod el 115 117 122 124 127 130 

Nominal cooling c apacit y (*) kW 15, 39 17, 41 22, 70 24, 27 26, 85 29, 06 

E.E.R. 2,76 2,67 2,76 2,62 2,59 2,44 

E.S.E.E.R. 3,15 3,11 3,44 3,09 3,18 2,89 

Sound pressure (**) dB(A) 50 50 52 52 53 53 

Sound power (***) dB(A) 72 72 75 75 76 76 

Scroll/step compressor No. 1/1 1/1 1/1 1/1 1/1 1/1 

Fans No. x kW 2x0. 14 2x0. 14 2x0. 24 2x0. 24 2x0. 24 2x0. 24 

Exc hanger water c ont ents l 1,33 1,33 1,90 2,20 2,40 2,60 

Wat er side exchanger nominal water fl ow (*) l/h 2647 2994 3891 4175 4618 4998 

Nominal pressure drops, water side exchanger (*) kP a 32, 40 41, 28 34, 74 30, 58 31, 86 32, 09 

Residual s tatic pressure (P1 ins tallati on) (*) kPa 147 130 130 125 110 105 

Residual s tatic pressure (ASP1 inst allation) (*) kP a 130 110 93 88 94 90 

Tank wat er content (ASP1 inst allation) l 35 35 45 45 45 45 

R410A refrigerant c harge 

See s erial No. plat e 

Pol yest er oil charge 

See c ompress or plat e 

Electri cal data 

Absorbed power (*) (●) kW 5,58 6,51 8,20 9,28 10, 35 11, 93 

Pump absor bed power kW 0,57 0,57 0,57 0,57 0,70 0,70 

Electrical power suppl y V-ph-Hz 400-3+N-50 

Auxiliary power supply V-ph-Hz 230-1- 50 

Nominal current (■) A 13, 1 14, 3 18, 8 20, 7 21, 0 24, 6 

Maximum current (■) A 16, 0 17, 0 21, 0 22, 7 25, 0 27, 0 

Starting current A 79 105 116 123 122 134 

Pump absor bed current A 2,8 2,8 2,8 2,8 5,1 5,1 

Dimensions 

Width (L) P1 inst allation mm 1230 1230 1230 1230 1535 1535 

Width (L) ASP1 i nstallati on mm 1522 1522 1522 1522 1822 1822 

Height (H) mm 1090 1090 1280 1280 1510 1510 

Depth (P) mm 580 580 600 600 695 695 

Wat er connec tions Ø 1 ½” 1 ½” 1 ½” 1 ½” 1 ½” 1 ½” 

(*) In the f ollowi ng conditions : condenser i nput 

air temperature 35°C; chilled water temperatur e 

7°C; t emperat ure differential at evaporat or 5°C. 

(**) Sound pressure l evel in dB(A), meas ured at 

a dist ance of 5 m from the unit, with a 

directionality fac tor of 2. 

(***) Sound power level in dB (A) bas ed on 

measurements made i n acc ordance wit h t he 

UNI EN-ISO 3744 standard and Eurovent 8/1. 

(●) Power abs orbed by the unit without motordriven 

pump. 

N.B.: 

The val ues for available static press ure of t he 

pumps and the pressure drops of the 

exc hangers can be found on page 35. 

The calc ulation of t he E.E.R. and C.O .P. does 

not take the pump abs orption int o acc ount. 

H 

(■) Total current value, incl uding t he c urrent 

absorbed by the pump. 

L 

P 

13




TCAEY mod el 133 233 238 

Nominal cooling c apacit y (*) kW 33, 99 32, 45 38, 80 

E.E.R. 2,56 2,64 3,06 

E.S.E.E.R. 2,85 2,92 3,69 

Sound pressure (**) dB(A) 54 54 54 

Sound power (***) dB(A) 78 78 79 

Scroll/step compressor No. 1/1 2/2 2/2 

Fans No. x kW 1x0. 61 1x0. 61 2x0, 78 

Exc hanger water c ont ents l 3,20 3,20 3,20 

Wat er side exchanger nominal water fl ow (*) l/h 5846 5581 6674 

Nominal pressure drops, water side heat exchanger (*) 

Standard inst allation 

kP a 30, 26 27, 63 56, 00 

Residual s tatic pressure (P1 ins tallati on) (*) kPa 134 134 130 


Residual s tatic pressure (ASP1 inst allation) (*) kP a 102 105 87 


Tank wat er content (ASP1 – ASP2 inst allation) l 80 80 150 


See s erial no. plate 




Total absorbed power (*) (●) kW 13, 30 12, 30 12, 70 

Pump absor bed power (P1/ ASP1) kW 0,70 0,70 0,70 




Nominal current (●) A 22, 0 20, 0 28 

Maximum current (●) A 25, 0 26, 0 34 

Starting current A 200 115 119 

Pump absor bed power (P1/ ASP1) A 5,1 5,1 5,1 


Dimensions 

Width (L) mm 1660 1660 2260 

Height (H) mm 1570 1570 1570 

Depth (P) mm 1000 1000 1000 

Wat er connec tions Ø 2” 2” 2” 




(**) Sound pressure l evel in dB(A), meas ured at 

a dist ance of 5 m from the unit, with a 


(***) Sound power level in dB (A) bas ed on 



(●) Add t he power and current val ues of t he 

pumps (P1/P2 or ASP1/ASP2) t o obt ain t he 

power and current absorbed by t he unit i n 

P1/P2 and ASP1/ASP2 versions. 

N.B.: 






H 

P 

133-233 

L 

238 

H 

P 

L 

14

THAEY 115÷130 


T able “ A”: Technical d ata 

THAEY mod el 115 117 122 124 127 130 

Nominal cooling c apacit y (*) kW 15, 27 17, 41 22, 26 23, 64 26, 33 28, 58 

E.E.R. 2,73 2,70 2,81 2,52 2,61 2,44 

E.S.E.E.R. 3,14 3,12 3,43 3,07 3,16 2,90 

Nominal heating capacity (**) kW 16, 84 17, 88 23, 94 26, 14 30, 69 34, 42 

C.O.P. 3,05 2,94 3,02 2,92 3,07 3,10 

Sound pressure (***) dB(A) 50 50 52 52 53 53 

Sound power (****) dB(A) 72 72 75 75 76 76 

Scroll/step compressor No. 1/1 1/1 1/1 1/1 1/1 1/1 

Fans No. x kW 2x0. 14 2x0. 14 2x0. 24 2x0. 24 2x0. 24 2x0. 24 

Exc hanger water c ont ents l 1,33 1,33 1,90 2,20 2,40 2,60 

Wat er side exchanger nominal water fl ow (*) l/h 2626 2994 3828 4066 4529 4916 

Nominal pressure drops, water side exchanger (*) kP a 32, 40 41, 28 34, 74 30, 58 31, 86 32, 09 

Residual s tatic pressure (P1 ins tallati on) (*) kPa 147 130 131 125 117 110 

Residual s tatic pressure (ASP1 inst allation) (*) kP a 131 110 97 91 97 90 

Tank wat er content (ASP1 inst allation) l 35 35 45 45 45 45 






Absorbed power in summer oper ation (*) (●) kW 5,58 6,45 7,93 9,38 10, 10 11, 70 

Absorbed power in wint er operation (**) (●) kW 5,53 6,08 7,92 8,95 10, 00 11, 11 

Pump absor bed power kW 0,57 0,57 0,57 0,57 0,70 0,70 



Nominal current in s ummer operation (*) (■) A 12, 9 15, 0 18, 0 21, 3 21, 0 24, 2 

Nominal current in wint er operati on (**) (■) A 15, 0 14, 5 18, 3 20, 5 20, 7 23, 2 

Maximum current (■) A 16, 0 17, 0 21, 0 22, 7 25, 0 27, 0 

Starting current A 79 105 116 123 122 134 

Pump absor bed current A 2,7 2,7 2,7 2,7 5,1 5,1 

Dimensions 

Width (L) (P1 i nstallati on) mm 1230 1230 1230 1230 1535 1535 

Width (L) (ASP1 installation) mm 1522 1522 1522 1522 1822 1822 

Height (H) mm 1090 1090 1290 1280 1510 1510 

Depth (P) mm 580 580 600 600 695 695 

Wat er connec tions Ø 1 ½” 1 ½” 1 ½” 1 ½” 1 ½” 1 ½” 

(*) In the f ollowi ng conditions : condenser i nlet 



(**) In the f ollowi ng conditions : evaporator i nlet 

air temperature 7°C D.B., 6°C W.B.; hot wat er 

temperature 45°C; temperat ure dif ferential at 

the condenser 5°C. 

(***) Sound pressure level in dB(A), meas ured 

at a distance of 5 m from the unit, with a 





pump. 

N.B.: 






H 

(****) Sound power l evel in dB (A) bas ed on 



L 

P 

15




THAEY mod el 133 233 238 


E.E.R. 2,56 2,64 3,06 

E.E.R. (EN 14511) - - 3,57 

E.S.E.E.R. 2,84 2,93 3,69 

Nominal heating capacity (**) kW 39, 14 37, 49 41, 72 

C.O.P. 2,94 3,05 3,26 

C.O.P. (EN 14511) - - 4,14 

Sound pressure (***) dB(A) 55 55 54 

Sound power (****) dB(A) 79 79 79 

Scroll/step compressor No. 1/1 2/2 2/2 

Fans No. x kW 1 x 0.61 1 x 0.61 2x0, 78 

Heat exchanger water contents l 3,20 3,20 3,20 

Wat er side heat exchanger nomi nal water flow (*) l/h 5846 5581 6674 

Nominal pressure drops, water side exchanger (*) Standard installation kP a 30, 26 27, 63 56, 00 





Tank wat er content (ASP1 – ASP2 inst allation) l 80 80 150 






Absorbed power in summer oper ation (*) (●) kW 13, 30 12, 30 12, 70 

Absorbed power in wint er operation (**) (●) kW 13, 30 12, 30 12, 80 





Nominal current in s ummer operation (*) (●) A 22, 0 20, 0 28 

Nominal current in wint er operati on (**) (●) A 20, 0 19, 0 26 

Maximum current (●) A 25, 0 26, 0 34 




Dimensions 

Width (L) mm 1660 1660 2260 

Height (H) mm 1570 1570 1570 

Depth (P) mm 1000 1000 1000 

Wat er connec tions Ø 2” 2” 2” 

(*) In the f ollowi ng conditions : condenser 

inlet air temperature 35°C; chilled water 

temperature 7°C; t emper ature diff erenti al at 

evaporat or 5°C. 

(**) In the f ollowi ng conditions : evaporator 

inlet air t emperature 7°C D.B., 6°C W. B.; hot 

wat er temperat ure 45°C; temperatur e 

differential at t he c ondenser 5°C. 

(***) Sound pressure level in dB(A), 

measured at a distance of 5 m from t he unit , 

with a directionalit y fac tor of 2. 

(****) Sound power l evel in dB (A) bas ed on 


UNI EN-ISO 3744 standard and Eurovent 

8/1. 


pumps (P1/P2 or ASP1/ASP2) t o obt ain t he 

power and current absorbed by t he unit i n 

P1/P2 and ASP1/ASP2 versions. 

N.B.: The val ues f or available static press ure 

of t he pumps and t he pressur e drops of t he 


The calc ulation of t he E.E.R. and C.O .P. 

does not t ake t he pump absorption i nto 

account. 

133-233 

H 

P 

L 

H 

P 

238 

L 

16

TXAEY 117÷130 


Table “ A”: Technical data 

TXAEY model 117 124 130 

Cooling operation in AUTOMATIC 1 mode 


E.E.R. (*) 2,70 2,52 2,44 

E.S.E.E.R. (*) 3,12 3,07 2,90 

Cooling operation with heat recovery in AUTOMATIC 2 mode 

Nominal cooling c apacit y in mai n heat exchanger (**) kW 15, 72 23, 03 27, 10 

Nominal heating capacit y in s econdar y heat exc hanger (**) kW 20, 81 30, 35 37, 21 

C.O.P. (**) 6,62 6,72 6,13 

Heat pump operation in modes SELECT 1-2 / AUTOMATIC 3 

kW 17, 91 26, 14 34, 42 

Nominal heating capacity (***) 

C.O.P. (***) 

2,95 2,92 3,14 

Sound pressure (****) dB(A) 50 52 53 

Sound power (*****) dB(A) 72 75 76 

Scroll/step compress or No. 1/1 1/1 1/1 

Circuits No. 1 1 1 

Fans No. x kW 2 x 0.14 2 x 0.24 2 x 0.24 

Main exchanger nominal flow (*) l/h 2995 4066 4916 

Nominal press ure drops in main exchanger (*) kPa 41 29 30 

Water content in main exchanger l 1,33 2,20 2,60 

Residual s tatic pressure at main heat exc hanger (*) kPa 130 131 110 

Main/secondary recovery exchanger nominal flow rate (***) l/h 3579 5220 6400 

Secondary r ecover y exchanger pr essure drops (***) kPa 60 50 54 

Recovery exchanger water content l 1,33 2,20 2,60 






input air temperat ure 35°C; c hilled water 

temperature 7°C; mai n heat exchanger 

(evapor ator) temperat ure differential 5°C. 

(**) In the following conditions: chilled water 


main exchanger (evaporator) 5°C, sec ondar y 

exchanger (recovery) hot water outlet 

temperature 40/ 45°C at nominal flow. 

N.B.: 

The val ues for available static press ure of 

the pumps and t he press ure drops of t he 




account. 

H 

(***) In the following conditions: coil inlet air 

temperature 7°C D.B., 85% R.H.; main 

exc hanger (condens er/evaporator) or 

secondary exchanger (recover y) hot water 

outlet temperat ure 40/ 45°C at nominal flow. 

(****) Level of s ound pressure in dB(A) 

measured at a distance of 5 m from t he unit 

with a directionalit y fac tor of 2 (to obt ain t he 

val ue i n open space, subtract 3 dB(A)). 

(*****) Sound power level in dB (A) bas ed on 



8/1. 

L 

P 

17

TXAEY 117÷130 


Electri cal data 117 124 130 

Absorbed power in AUTOMATIC 1 mode (*) (●) kW 6,45 9,38 11, 70 

Absorbed power in AUTOMATIC 2 mode (**) (●) kW 4,95 7,37 9,79 

Absorbed power in AUTOMATIC 3 / SELECT 2/ SELECT 1 mode (***) (●) kW 6,08 8,95 11, 11 

Pump absor bed power kW 0,57 0,57 0,70 



Nominal current (▲) (■) A 15, 0 21,3 24,2 

Maximum current (■) A 17, 0 22,7 27,0 


Pump absor bed current A 2,7 2,7 5,1 

Dimensions 

Width (L) mm 1522 1522 1822 

Height (H) mm 1090 1280 1510 

Depth (P) mm 580 600 695 

Wat er connec tions Ø 1 ½” 1 ½” 1 ½” 

Recover y system water filling connection Ø 1 ½” 1 ½” 1 ½” 



7°C; main heat exchanger (evaporator) 

temperature differ ential 5°C. 






N.B.: 






H 




secondary exchanger (recover y) hot water 


(▲) The current value shown is the maximum 

from among t he values meas ured i n 

AUTOMATIC and SELECT mode in the 

respecti ve nominal conditions. 


pump. 



L 

P 

18

TXAEY 133 


Table “ A”: Technical data 

TXAEY model 133 

Cooling operation in AUTOMATIC 1 mode 

Nominal cooling c apacit y (*) kW 34, 00 

E.E.R. (*) 2,56 

E.S.E.E.R. (*) 2,84 

Cooling operation with heat recovery in AUTOMATIC 2 mode 

Nominal cooling c apacit y in mai n heat exchanger (**) kW 32, 40 

Nominal heating capacit y in s econdar y heat exc hanger (**) kW 44, 20 

C.O.P. (**) 6,25 

Heat pump operation in modes SELECT 1-2 / AUTOMATIC 3 

Nominal heating capacity (***) kW 39, 14 

C.O.P. (***) 2,94 

Sound pressure (****) dB(A) 54 

Sound power (*****) dB(A) 78 

Scroll/step compress or No. 1/1 

Circuits No. 1 

Fans No. x kW 1 x 0 .61 

Main exchanger nominal flow (*) l/h 5846 

Nominal press ure drops in main exchanger (*) kPa 32 

Nominal press ure drops in main exchanger (**) kPa 42 

Water content in main exchanger l 3,20 

Residual s tatic pressure at the main heat exchanger (*) P1/ P2 kPa 134 / 230 

Residual s tatic pressure at the main heat exchanger (*) ASP1/ASP2 kPa 102 / 198 

Tank water content ASP1 / ASP2 l 80 / 80 

Main/secondary recovery exchanger nominal flow rate (***) l/h 7602 

Secondary r ecover y exchanger pr essure drops (***) kP a 53 

Recovery exchanger water content l 3,20 






input air temperat ure 35°C; c hilled water 

temperature 7°C; mai n heat exchanger 

(evapor ator) temperat ure differential 5°C. 






N.B.: 

The val ues for available static press ure of 

the pumps and t he press ure drops of t he 




account. 

H 




secondary exchanger (recovery) hot water 


(****) Level of s ound pressure in dB(A) 

measured at a distance of 5 m from t he unit 

with a directionalit y fac tor of 2 (to obt ain t he 

val ue i n open space, subtract 3 dB(A)). 

(*****) Sound power level in dB (A) bas ed on 



8/1. 

P 

L 

19

TXAEY 133 


Electri cal data 133 

Absorbed power (P1/P2) AUTOMATIC 1 mode (*) (●) kW 13, 30 

Absorbed power (P1/P2) AUTOMATIC 2 mode (**) (●) kW 11, 50 

Absorbed power in AUTOMATIC 3 / SELECT 2/ SELECT 1 mode (***) (●) kW 13, 30 

Pump absor bed power P1 / P2 kW 0,70 / 1,50 



Nominal current (▲) (●) A 22, 0 

Maximum current (●) A 25, 0 

Starting current A 200 

Pump absor bed power P1 / P2 A 5,1 / 8, 6 

Dimensions 

Width (L) mm 1660 

Height (H) mm 1570 

Depth (P) mm 1000 

Wat er connec tions Ø 2” 

Recover y system water filling connection Ø 1 ½” 



7°C; main heat exchanger (evaporator) 

temperature differ ential 5°C. 






N.B.: 






H 




secondary exchanger (recovery) hot water 


(▲) The current value shown is the maximum 

from among t he values meas ured i n 

AUTOMATIC and SELECT mode in the 

respecti ve nominal conditions. 


pumps (P1/P2) to obtain the t otal value of the 

power and current absorbed by t he unit. 

P 

L 

20

TCAEY-THAEY 115÷238 / TXAEY 111÷133 


Energy efficiency at partial loads - ESEER index 

○ The E.E.R. i ndex repres ents an es timate of t he energy efficienc y of 

the cooling unit in nominal design conditions. In reality, the operating 

time of a chiller in nominal conditions is usually less than the operating 

time i n partial load c onditi ons. 

○ The E.S.E.E.R. (European Seas onal E. E.R.) is an index t hat 

estimates the average seasonal energy efficienc y of the cooling unit i n 

four load and wat er temperat ure c onditi ons. Generall y, t wo wat er 

chillers with the same E.E.R. may have different E.S.E.E.R. values. In 

fact, for a water cooling unit, the average energy efficiency depends on 

design choices and on t he t emper ature of i nlet water at t he c ondensing 

heat exchanger. 

○ The E.S.E.E.R. energy index, introduc ed by t he European 

Communit y (Project E.E.C.C.A.C. - Energ y Ef ficienc y and Certificati on 

of Central Air Conditioners), is charact erised by t he water t emperatures 

(see table “B”) and by the energy weights t hat are assigned to the four 

load c onditions consi dered in the calcul ation: 100% , 75%, 50% and 

25%. 

ESEER = 

3xEER 100% +33xEER 75%+41xEER 50% +23xEER 25% 

100 

where EER100% EER75% EER50% EER25% represent t he 

efficienci es of the cooling unit in t he four load conditions and at the 

temperatures i ndicat ed in t able “B”. 

The dat a is calcul ated usi ng Eurovent methodology. The pump 

absorption (if present) is not taken into c onsideration. 

Table “B”: load and temperature conditions 

Condenser inlet air temperature 

Load 

E.S.E.E.R. 

100% 35°C 

75% 30°C 

50% 25°C 

25% 20°C 

○ Table “C” shows the E.E.R. and E.S.E.E.R. values for each model. 

The high values of energy efficienc y at partial loads were ac hieved 

thanks to optimisation of the heat exc hangers. 

Table “C”: E.E.R. - E.S.E.E.R. for TC AEY 

Model E.E.R. E.S.E.E.R. 

115 2,76 3,15 

117 2,67 3,11 

122 2,76 3,44 

124 2,62 3,09 

127 2,59 3,18 

130 2,44 2,89 

133 2,56 2,85 

233 2,64 2,92 

238 3,06 3,69 

Table “C”: E.E.R. - E.S.E.E.R. for TH AEY 

Modèle E.E.R. E.S.E.E.R. 

115 2,73 3,14 

117 2,70 3,12 

122 2,81 3,43 

124 2,52 3,07 

127 2,61 3,16 

130 2,44 2,90 

133 2,56 2,84 

233 2,64 2,93 

238 3,06 3,69 

Table “C”: E.E.R. - E.S.E.E.R. for T XAEY 

Model E.E.R. E.S.E.E.R. 

117 2,67 3,12 

124 2,62 3,07 

130 2,44 2,90 

133 2,56 2,84 

21

TXAEY 117÷133 

TXAEY operating principle 

○ The ec ological polyvalent s yst em was 

designed by RHOSS to provide 2-pipe and 4- 

pipe s ys tems with hot wat er from anot her heat 

exc hanger (recover y) year-round, as well as 

acting as a traditional reversible-cycle water 

chiller. 

○ The t otal heat rec over y units also allow 

efficient energy r ationalisation. 

○ The s yst em can operat e in two modes, 

which can be sel ected by elec tronic c ontrol. 

These are c alled AUTOMATIC and SELECT. 

• In AUTOMATIC mode, t he s ystem allows for 

full recover y of t he heat of c ondensation and/or 

the production of chilled water. 

• In SELECT mode, it allows f or the production 

of hot water by the sec ondar y or main heat 

exchanger. 

AUTOMATIC mode - multi-season 

○ In this mode the s ystem automatically 

manages the r equests for hot or chilled water, 

suppl ying chilled water to the main exchanger 

and hot wat er to the sec ondar y exchanger, 

even simult aneously. 

○ Each r equest for hot or cold water is 

satisfied independently of ever y other request . 

○ When t he s econdary exchanger requires hot 

water, the flow of gas delivered from the 

compressor is directed towards the recover y. If 

chilled wat er is required at t he same time, t he 

unit oper ates as a wat er chiller. 

○ In AUTOMATIC mode t he unit therefor e has 

three possi ble aut omatic operating 

configurations: 

• AUTOMATIC 1 (A1) - operation as an aircooled 

water chiller for the production of chilled 

wat er. 

• AUTOMATIC 2 (A2) - operati on as a wat er 

chiller with total heat recovery for simultaneous 

produc tion of hot and c hilled water. 

• AUTOMATIC 3 (A3) - operation as a heat 

pump f or the production of hot wat er at the 

secondar y exchanger (recover y). 

operating principle 

SELECT mode - multi-season 

○ In this mode, based on requests the system 

provides hot wat er to the main exchanger 

SELECT 1 (S1) or hot water t o t he s econdary 

exchanger SELECT 2 (S2). If simultaneous 

requests are expect ed, priorit y of operati on 

must be est ablished vi a the electronic control. 

○ If the reques t f or hot wat er from t he s elect ed 

heat exc hanger is completel y satisfied, the hot 

gas can be c omplet el y s witched over t o t he 

other heat exchanger, provided t his is 

requested. 

○ The unit is programmed in t he fact or y to 

provide hot wat er wit h priorit y assigned to the 

secondar y exchanger. You c an however modif y 

this set ting from the el ectronic c ontrol panel. 

○ To summarise, oper ation in SELECT mode 

offers t wo possible automatic c onfigurations: 

• SELECT 1 (S1) - operation as a heat pump 

for the produc tion of hot wat er at the main 

exchanger. 

• SELECT 2 (S2) - operation as a heat pump 

for the produc tion of hot wat er at the main 

exchanger. 

Diagram of AUTOMATIC operating mode 

R 

C 

S 

Produc tion of c hilled water onl y at t he mai n exc hanger 

(A1). 

Produc tion of c hilled water at t he mai n exc hanger and hot 

wat er at the sec ondar y exchanger (A2) (recovery). 

Produc tion of hot wat er onl y at the sec ondar y exc hanger 

(A3) (recover y). 

E 

V 

S 

C 

E 

R 

V 

Air side condens er/evaporator. 

Compressor. 

Main exchanger (condens er/evaporator). 

Secondary exchanger (recovery). 

Laminati on val ve. 

Diagram of SELECT operating mode 

R 

C 

S 

Produc tion of hot wat er at the 

main exchanger (S1). 

Produc tion of hot wat er at the 

secondary exchanger (S2). 

E 

V 

S 

C 

E 

R 

V 

Air side condens er/evaporator. 

Compressor. 

Main exchanger (condens er/evaporator). 

Secondary exchanger (recovery). 

Laminati on val ve. 

22

TXAEY 117÷133 

operating logic 

Operating logic 

○ The f ollowi ng tabl es provi de exampl es of 

aut omatic operation of the polyvalent s yst em in 

various operating modes based on the requests 

from t he user. 

○ The first t able shows the operating stat us 

and the produc tion of hot and c hilled water 

considering the si ngle requests . 

○ The subsequent tables s how t he operating 

status and t he production of hot water in the 

main and s econdar y exchangers on t he basis of 

requests and the priorit y assigned to t he 

exchangers 

TXAEY operating in AUTOMATIC mode 

Request 

Request for hot water at the secondary exchanger (recovery) 

for 

chilled 

0 % 100 % 

water (*) Status Operation Status Operation 

0 % OFF - ON Recover y onl y (A3) 

100 % ON Cooling (A1) ON Cooling + recover y (A2) 

(A1) = AUTOMATIC 1 (A2) = AUTOMATIC 2 (A3) = AUTOMATIC 3 

Request 

for hot 

water (**) 

TXAEY working in SELECT mode with priorit y to the secondary exch anger (recovery) 


0 % 100 % 

Status Operation Status Operation 

0 % OFF - ON Recover y onl y (S2) 

100 % ON Heating only (S1) ON Recover y onl y (S2) 

(S1) = SELECT 1 (S2) = SELECT 2 

Request 

for hot 

water (**) 

TXAEY working in SELECT mode with priorit y to the main exchang er (condenser/evaporator) 


0 % 100 % 

Status Operation Status Operation 

0 % OFF - ON Recover y onl y (S2) 

100 % ON Heating only (S1) ON Heating only (S1) 

(S1) = SELECT 1 (S2) = SELECT 2 

(*) Request f or chilled water at t he main exchanger (evaporat or). 

(**) Request f or hot wat er at the main exchanger (condenser/evaporat or). 

The competitive advantages of the 

polyvalent system 

○ The pol yvalent s yst em was pat ented by 

RHOSS S.p.A. to provide for the reques t for 

hot and col d wat er, simultaneousl y or 

independentl y, with a si ngle unit . This opti mizes 

energy consumpti on and makes management 

easier. 

○ The pol yvalent s yst em is a valid alternati ve 

to traditional systems that require the use of a 

chiller or heat pump, with use or addition of a 

boiler. The advantages derive from t he use of a 

single unit, energy s avings due t o high CO Ps, 

and the lac k of use of c ombus tible products, s o 

that it can be defined as an ecological 

pol yvalent mac hine. 

○ The s yst em is a versatile f ourth-generation 

pol yvalent heat pump. As opposed t o other 

pol yvalent units, it meets the t ypical demands of 

2-pipe and 4- pipe s ys tems with a single unit 

and in a most fl exible manner, so that it c an 

even be us ed in existing s yst ems wit h no 

modifications required. 

○ This pol yval ent unit takes it place on the 

mar ket as a unit t hat ensures essential aspects 

such as EFFICIENCY, RELIABILITY AND 

VERSATILITY. 

23

TXAEY 117÷133 

applications 

Applications of the polyvalent 

system 

The pol yvalent ecological s yst em was designed 

by RHOSS S.p. A. to provide year-round suppl y 

of hot and cold wat er to 2-pipe or 4-pipe 

syst ems , eit her simultaneousl y or 

independentl y, depending on t he s elect ed 

operating mode, AUTOMATIC or SELECT. 

2-pipe-systems 

○ Air conditi oning and the produc tion of hot 

wat er in a 2-pi pe s ys tem is a t ypical application 

in hotels, hos pitals, g yms and hos pitalit y 

structures i n general. 

○ When in AUTOMATIC mode, it is used in 

the s ummer mont hs f or cooling and the 

produc tion of hot wat er. 

○ When in SELECT mode, it is us ed in 

bet ween s eas ons or in winter f or heating or t he 

produc tion of hot wat er on the basis of t he 

priority assigned. 

Summer months ≈AUTOMATIC∆ 

W ater for domestic Air conditioning 

use 

Hot water 

Chilled water 

W inter months “SELECT ” 

W ater for domestic use or air 

conditioning 

Hot water 

4-pipe systems 

○ Increasingl y frequentl y, modern HVAC 

installations require t he si mult aneous 

produc tion of hot and c hilled water. This can 

occur more oft en bec ause of : 

• the development of new t ypes of thermal 

insulation for buildings; 

• increase of i nternal loads (CED, WEB,…); 

• lighting systems; 

• the presence of l arge windows; 

• the growing importance attributed to air 

quality, which requires the us e of conditioning 

systems year-round. 

In t hese kinds of application, it c an be us ed in 

AUTOMATIC mode thr oughout the year, 

catering to simultaneous or s eparate hot and 

chilled water demands in a completely 

aut omatic way. 

"AUTOMATIC" mode for the entire year 

Winter 

Heating 

Air conditioning 

Hot water 

Summer 

Cooling 

Air conditioning 

Chilled water 

Spring/Autumn 

Cooling and heati ng 

Air conditioning 1 Air conditioning 2 

Hot water 

Chilled water 

CR 

Standard connection: 

the rec over y pump (ins talled by the inst aller) is 

on at all ti mes . Recover y is acti vated on t he basis 

of t he t emper ature of r eturn wat er to the boiler. 

Example of water circuit 

With external boiler (recover y) 

CR 

T 

Suggested connection: 

the rec over y and the rec over y pump (inst alled by 

the i nstaller) are acti vated by the t hermostat 

installed on the boiler. 

N.B.: 

The maxi mum t emperat ure t o whic h the t her most at c an be s et, and 

henc e t he s et-point of t he machine, mus t be set on t he basis of t he 

operating limits. 

T 

Attention: 

Units equipped wit h a recovery unit or desuperheater must be operat ed 

in complianc e with the provisions in It alian Minist erial Decree 01/12/04 

No.309. This law is only valid in the Italian Republic. For installation in 

other countries, refer to current local legislation. 

Hot wat er for domestic use c an be produc ed onl y by using an additional 

heat exc hanger which is s uited to this purpose. Refer to c urrent l ocal 

laws and regulations. 

An ad equate supply of water mu st be guaranteed to the recovery 

circuit in order to prevent the compressor from switching on and 

off frequently and poor performan ce du e to the defrosting cycles. 

To cal culate the corr ect water content, please refer to page 48. 

24


electronic controls 

Electronic controls for TCAEY THAEY 115÷133 

models 

STANDARD control 

The keyboard with display makes it possible to view the wor king 

temperature and all t he unit proc ess variables, as well as providi ng 

access t o setting paramet ers for oper ating set poi nts and their 

modification. For purposes of tec hnical assistance, it allows pass wordprotect 

ed access to the unit's management par ameters (acc ess f or 

aut horised pers onnel onl y). 

KTR1 - Remote keypad for STANDARD control 

The remot e keypad with displ ay (KTR1) enables remot e c ontrol and t he 

display of all t he unit's digital and anal ogue process variables . It 

theref ore possibl e to control all t he machine f uncti ons directl y in t he 

room. 

1 2 

mode 

set 

Line 

MODE 

ON/OFF 

RESET 

MODE – UP key 

Makes it possible to s elect the unit oper ating mode 

(stand-by, summer or wint er c ycle). I t is also us ed 

for altering parameters upwards. 

ON/OFF – RESET – DOW N key 

Makes it possible to s witc h any unit alarms on or off 

and reset them. It is also used f or altering 

paramet ers downwards. 

DISPLAY 

Displays the values of all t he parameters (i.e. 

outlet wat er temperat ure, etc.), c odes of any 

alarms and status of res ources . 

WINTER LED 

Indicates t hat the unit is runni ng in heating 

mode. 

SUMMER LED 

indicates that the unit is running in cooling 

mode. 

COMPRESSOR LED 

Indicates t hat the c ompressor is running or is in 

time-delay mode. 

DEFROSTING LED 

Inacti ve. 

Plate h eat exch anger h eater L ED 

Indicates t he acti vation of the el ectric heater 

POW ER SUPPLY LED 

Indicates t hat the unit is c onnect ed to the power 

suppl y. 

MODE 

ON/OFF 

RESET 

UP key 

Makes it possible to alter parameters upwards. 

DOWN key 

Makes it possible to alter parameters 

downwards . 

MODE key 

Makes it possible to s elect the unit oper ating 

mode (st and- by, summer or winter c ycle). 

ON/OFF – RESET key 

Makes it possible to s witc h any unit alarms on or 

off and reset them. 

DISPLAY 

Displays the values of all t he parameters (i.e. 

outlet wat er temperat ure, etc.), c odes of any 

alarms and status of res ources . 

WINTER LED 

Indicates t hat the unit is runni ng in heating 

mode. 

SUMMER LED 

indicates that the unit is running in cooling 

mode. 

COMPRESSOR LED 

Indicates t hat the c ompressor is running or is in 

time-delay mode. 

DEFROSTING LED 

Inacti ve. 

Plate h eat exch anger h eater L ED 

Indicates t he acti vation of the el ectric heater 


Indicates t hat the unit is c onnect ed to the power 

suppl y. 

25



Compatible 

control 







KTR – Remote keypad for compatible 

control 

The remot e keyboard with displ ay (KTR) allows t he remote c ontr ol and 



room. It allows set ting and management of ti me periods (if KSC 

accessor y is incl uded). 

MODE 

! 

ALARM 

ALARM 

Prg 

Prg 

MODE 

ON/OFF 

ON 

OFF 

SUMMER LED - MODE, UP key: 

indicates that the unit is running in cooling mode. 

This key makes it possible to s elect the unit oper ating 

mode (summer or winter c ycle) and also allows t he 

user to run up through t he list of parameters, t he 

val ues displayed and any alarm c odes. 

W INTER LED - ON/OFF, DOW N key: 

Indicates t hat the unit is runni ng in heating mode. 

This key makes it possible to s witc h t he unit on and 

off and also allows t he user t o run down t hrough the 

list of paramet ers, the values displayed and any 

alarm c odes. 

ALARM LED – Prg , ALARM key 

When on, it indic ates the pres enc e of at leas t one 

alarm sit uati on in the mac hine. This key makes it 

possible to programme the mac hine, displ ay the 

alarm c odes and res et the same. 

Display 

Display all the parameters (i.e. outl et water 

temperature, etc.), codes of any alarms and 

status of r esourc es. 

MODE 

ON/OFF 

ALARM 

Prg 


Indicates t he pres ence of the power suppl y when 

the mac hine is s witched off. If the regulation 

temperature is displayed and flas hing, it means 

that the reques ted compress or is stationary due t o 

the s afety ti me delays . 

! 

ALARM 

Prg 

ON 

OFF 

DISPLAY: 

displays t he numbers and the values of all t he 

paramet ers (i.e. outl et wat er temperat ure etc.), 

any alarm c odes and r esource st atus by means of 

strings. 

ALARM key: 

makes it possible to display of the code and res et 

any alarms. 

PRG key: 

makes it possible to programme the mac hine's 

operating par ameters. 

ON/OFF key: 

makes it possible to s witc h the unit on and off. 

UP key: 

used to scr oll through the list of paramet ers, 

status es and any alar ms; makes it possibl e to 

modify set points. 

MODE - ENTER key: 

makes it possible to switch from chiller to heat 

pump operation and vic e versa. 

DOWN key: 




MODE 

Note: 

The t emporar y presence of t wo devices, on- boar d machi ne keyboard 

and remote keyboar d, will cause the on-board machine terminal to be 

disabled. T hree das hes (- - -) will be displayed on the interface on the 

mac hine, indic ating the presence of t he r emote keypad (KTR). 

26



Electronic control 

for units133-233 with accessories RC100 and DS15 







KTR - Remote keyboard 

for units 133-233 with accessories RC100 and DS15 






! 

ALARM 

! 

ALARM 

Prg 

MODE 

Prg 

MODE 

ON 

OFF 

ON 

OFF 

DISPLAY: 




strings. 

DISPLAY: 




strings. 

! 

ALARM 

ALARM key: 


any alarms. 

! 

ALARM 

ALARM key: 


any alarms. 

Prg 

PRG key: 



Prg 

PRG key: 



ON 

OFF 

ON/OFF key: 


UP key: 







DOWN key: 




MODE 

ON 

OFF 

ON/OFF key: 


UP key: 







DOWN key: 




MODE 

Note: 



disabled. 

27

TXAEY 117÷133 

electronic control 

Electronic controls for TXAEY 117÷133 models 

Electronic control 







KTR – Remote keyboard 






! 

ALARM 

! 

ALARM 

Prg 

MODE 

Prg 

MODE 

ON 

OFF 

ON 

OFF 

DISPLAY: 




strings. 

DISPLAY: 




strings. 

! 

ALARM 

ALARM key: 


any alarms. 

! 

ALARM 

ALARM key: 


any alarms. 

Prg 

PRG key: 



Prg 

PRG key: 



ON 

OFF 

ON/OFF key: 


UP key: 







DOWN key: 




MODE 

ON 

OFF 

ON/OFF key: 


UP key: 







DOWN key: 




MODE 

Note: 



disabled. 

28

TCAEY-THAEY-TXAEY 115÷238 

serial connection 

Serial connection 

Serial connection for STANDARD control 

All units are equi pped with elec tronic c ontrol that can int erfac e 

with an ext ernal s yst em via a serial c ommunicati on line by means 

of t he KIS s erial int erface acc essor y (proprietar y pr otoc ol or 

ModBus ® RTU) and t he KRS232/KUSB converter. 

Supervision 

In general, a super vision s ys tem allows access to all unit functions, 

such as: 

○ making all s ettings which are accessi ble t hrough the keyboard; 

○ reading all process variables of the inputs and out puts, whether 

digital or analogue; 

○ reading t he various alarm c odes whic h are pres ent, and res etting 

them as necessar y; 

○ reading all programming par ameters and var ying some of them. 

Maxi mum 200 units . 

Maxi mum dist anc e 1,000 m. 

KIS KIS KIS 

KRS232/KUSB 

Serial connection for compatible 

control 

All units are equi pped with elec tronic c ontrol that is set up interfac e 

with an ext ernal BMS via a serial c ommunicati on line by means of 

the KRS485 s erial int erface acc essor y (proprietar y pr otoc ol or 

ModBus ® RTU) and t he following converters. 

○ KRS232 – RS485/RS232 converter for connection to super vision 

systems; 

○ KUSB – RS485/U SB c onverter for c onnecti on t o s uper vision 

systems; 

○ The FTT10 LonWor ks ® compatible interface is also available. 

Supervision 

In general, a super vision s ys tem allows access to all unit functions, 

such as: 

○ making all s ettings which are accessi ble t hrough the keyboard; 

○ reading all process variables of the inputs and out puts, whether 

digital or analogue; 

○ reading t he various alarm c odes whic h are pres ent, and res etting 

them as necessar y. 

Maxi mum 200 units . 

Maxi mum dist anc e 1,000 m. 

KRS485 KRS485 KRS485 

KRS232 

KUSB 

KSC – Clock card 

Exampl e of disp lay 

Insertion of the cloc k card (KSC) favours flexi ble and efficient use 

of t he unit, showing t he date/ time and allowi ng management of 

the mac hine in dail y or weekl y st art/stop ti me periods, with the 

possibility to change set-points. The time periods can be set and 

managed from the keyboard. 

! 

ALARM 

Prg 

MODE 

ON 

OFF 

29


performances 

Performance 

Choice of a chiller or heat pump and 

use of the performance tables 

○ For eac h model, t able “D” provi des the 

cooling capacity (QF), and the t otal abs orbed 

electric power (P), on the basis of t he 

evaporat or outlet water t emperature wit h 

const ant temperatur e diff erences ΔT = 5°C: the 

val ue of QT is the val ue of t he heating capacit y 

availabl e to the us er in winter mode. 

○ Within operating limits, the val ues i n t able 

“D” may permit interpolations of performanc e 

but extrapolati ons are not per mitted. 

○ Table “H” shows the values of correcti ve 

coefficients t o be applied to t he nominal values 

if water with gl ycol is used. 

○ Graph “ 1” shows the pr essure drop values 

of t he heat exc hangers (wit h respect t o t he 

indicat ed t emper ature diff erenc es). 

○ Graph “ 2” indicates t he useful st atic 

pressure of t he pump (if pres ent). 

Example: 

○ Design conditi ons for a air-cooled chiller with 

installation P1: 

• Requested cooling capacity = 29.2 kW; 

• Temperat ure of wat er produc ed at 

evaporat or = 13°C; 

• Temperat ure dif ferential ΔT at t he 

evaporat or = 5°C; 

• Inlet air temperatur e at condenser = 30°C. 

Using the val ues i ndicat ed in t able “D”, and 

supposing a temperatur e diff erential of ΔT=5°C 

at t he c ondens er, it c an be seen t hat model 109 

meets the requirement with: 

QF=29.2 kW; P=7.9 kW; 

The water flow rates G to be sent to the 

exc hangers are obt ained using the f ollowi ng 

formul ae: 

G (l/h) evaporator = 

(QFx860)÷ΔT=(29. 2x860)÷5=5022. 4 (l/h); 

Graph “ 1” shows the press ure dr op values Δpw 

of t he evaporat or. 

Δpw evaporat or = 60 kPa; 

Graph “ 2” shows the residual st atic press ure 

val ues Δpr available on t he machine outlet 85 

kP a. 

30


performances 

Performance data for TCAEY-THAEY 115÷238 models 

Table “D”: TCAEY cooling capacit y (ΔT = 5°C at the evaporator) 

Model 

115 

117 

122 

124 

127 

130 

133 

233 

238 

Tue (°C) 

Ta (°C) 

20 25 30 35 40 42 

QF P QF P QF P QF P QF P QF P 

kW kW kW kW kW kW kW kW kW kW kW kW 

5 17, 7 4,4 16, 7 4,9 15, 7 5,4 14, 6 6,0 13, 4 6,7 12, 9 7,0 

7 18, 7 4,5 17, 7 5,0 16, 5 5,5 15, 4 6,2 14, 2 6,8 13, 7 7,1 

9 19, 7 4,6 18, 6 5,1 17, 5 5,7 16, 3 6,3 15, 0 6,9 14, 4 7,2 

11 20, 8 4,7 19, 6 5,2 18, 4 5,8 17, 1 6,4 15, 8 7,0 - - 

13 21, 9 4,8 20, 7 5,3 19, 3 5,9 18, 0 6,5 16, 6 7,2 - - 

15 23, 0 4,9 21, 7 5,4 20, 4 6,0 18, 9 6,6 17, 5 7,3 - - 

18 24, 7 5,1 23, 3 5,6 21, 9 6,1 20, 4 6,7 - - - - 

5 19, 6 5,0 18, 6 5,6 17, 5 6,2 16, 4 7,0 15, 2 7,8 14, 7 8,1 

7 20, 8 5,1 19, 7 5,7 18, 6 6,4 17, 4 7,1 16, 1 7,9 15, 6 8,2 

9 22, 0 5,3 20, 9 5,8 19, 7 6,5 18, 4 7,2 17, 1 8,0 16, 6 8,3 

11 23, 2 5,4 22, 0 6,0 20, 8 6,6 19, 5 7,3 18, 1 8,1 - - 

13 24, 5 5,5 23, 3 6,1 22, 0 6,7 20, 6 7,4 19, 2 8,2 - - 

15 25, 8 5,7 24, 5 6,3 23, 1 6,9 21, 7 7,6 20, 2 8,3 - - 

18 27, 8 5,9 26, 4 6,5 25, 0 7,1 23, 4 7,8 - - - - 

5 25, 5 5,9 24, 2 6,6 22, 9 7,3 21, 4 8,7 19, 8 9,1 19, 2 9,5 

7 27, 2 6,1 25, 9 6,7 24, 4 7,4 22, 7 8,8 21, 2 9,1 20, 5 9,5 

9 29, 0 6,2 27, 5 6,8 26, 0 7,6 24, 3 8,8 22, 5 9,2 21, 8 9,6 

11 30, 8 6,4 29, 2 7,0 27, 6 7,7 25, 8 8,8 23, 9 9,3 - - 

13 32, 6 6,5 30, 9 7,2 29, 2 7,9 27, 3 8,8 25, 4 9,5 - - 

15 34, 4 6,7 32, 7 7,3 30, 8 8,1 28, 9 8,8 26, 9 9,7 - - 

18 37, 3 7,4 35, 3 8,1 33, 3 8,9 31, 3 9,8 - - - - 

5 27, 4 7,1 26, 0 7,8 24, 5 8,7 22, 9 9,7 21, 1 10, 9 20, 4 11, 3 

7 29, 0 7,2 27, 5 8,0 26, 0 8,9 24, 3 9,8 22, 4 10, 9 21, 7 11, 4 

9 30, 7 7,4 29, 2 8,1 27, 5 9,0 25, 7 10, 0 23, 8 11, 0 23, 0 11, 5 

11 32, 4 7,5 30, 8 8,3 29, 1 9,1 27, 2 10, 1 25, 2 11, 2 - - 

13 34, 2 7,7 32, 5 8,4 30, 7 9,3 28, 8 10, 3 26, 6 11, 3 - - 

15 36, 0 7,8 34, 2 8,6 32, 4 9,5 30, 3 10, 4 28, 1 11, 5 - - 

18 38, 8 8,1 36, 9 8,9 34, 8 9,7 32, 7 10, 7 - - - - 

5 30, 3 8,1 28, 8 8,9 27, 1 9,9 25, 3 10, 9 23, 4 12, 1 22, 6 12, 6 

7 32, 1 8,3 30, 5 9,1 28, 7 10, 0 26, 9 11, 1 24, 8 12, 2 24, 0 12, 7 

9 33, 9 8,4 32, 2 9,2 30, 4 10, 2 28, 4 11, 2 26, 3 12, 3 25, 4 12, 7 

11 35, 8 8,6 34, 1 9,4 32, 2 10, 3 30, 1 11, 3 27, 8 12, 4 - - 

13 37, 7 8,7 35, 9 9,5 33, 9 10, 5 31, 8 11, 5 29, 4 12, 5 - - 

15 39, 7 8,9 37, 7 9,7 35, 7 10, 6 33, 4 11, 6 31, 0 12, 7 - - 

18 42, 7 9,1 40, 7 10, 0 38, 4 10, 9 36, 0 11, 9 - - - - 

5 32, 4 9,4 30, 9 10, 3 29, 3 11, 3 27, 5 12, 4 25, 6 13, 6 24, 8 14, 1 

7 34, 3 9,6 32, 7 10, 5 31, 0 11, 5 29, 1 12, 6 27, 1 13, 9 26, 2 14, 4 

9 36, 2 9,8 34, 5 10, 7 32, 7 11, 7 30, 7 12, 8 28, 6 14, 1 27, 7 14, 6 

11 38, 2 10, 0 36, 3 10, 9 34, 5 11, 9 32, 4 13, 1 30, 2 14, 3 - - 

13 40, 2 10, 2 38, 3 11, 1 36, 3 12, 1 34, 0 13, 3 31, 8 14, 5 - - 

15 42, 2 10, 4 40, 2 11, 3 38, 1 12, 3 35, 8 13, 5 33, 4 14, 7 - - 

18 45, 3 10, 7 43, 2 11, 6 40, 9 12, 6 38, 5 13, 8 - - - - 

5 37, 8 10, 5 36, 0 11, 5 34, 2 12, 6 32, 1 13, 8 29, 9 15, 1 29, 0 15, 7 

7 39, 9 10, 7 38, 1 11, 7 36, 2 12, 8 34, 0 14, 0 31, 7 15, 3 30, 8 15, 8 

9 42, 1 10, 9 40, 3 11, 9 38, 1 13, 0 35, 9 14, 2 33, 5 15, 6 32, 5 16, 1 

11 44, 5 11, 2 42, 5 12, 1 40, 3 13, 2 37, 9 14, 5 35, 4 15, 8 - - 

13 46, 8 11, 4 44, 7 12, 4 42, 4 13, 5 39, 9 14, 7 37, 3 16, 0 - - 

15 49, 2 11, 6 47, 0 12, 6 44, 6 13, 7 42, 0 14, 9 39, 3 16, 2 - - 

18 53, 0 11, 9 50, 5 12, 9 48, 0 14, 0 45, 3 15, 2 - - - - 

5 36, 5 9,4 34, 7 10, 3 32, 7 11, 5 30, 6 12, 8 28, 4 14, 3 27, 5 14, 9 

7 38, 6 9,6 36, 8 10, 6 34, 7 11, 7 32, 5 13, 0 30, 2 14, 4 29, 2 15, 0 

9 40, 9 9,8 38, 9 10, 8 36, 8 11, 9 34, 5 13, 2 32, 0 14, 6 31, 0 15, 2 

11 43, 2 10, 1 41, 1 11, 1 38, 8 12, 2 36, 5 13, 4 33, 9 14, 8 - - 

13 45, 5 10, 3 43, 3 11, 3 40, 9 12, 4 38, 5 13, 7 35, 8 15, 0 - - 

15 48, 0 10, 6 45, 6 11, 6 43, 2 12, 7 40, 6 13, 9 37, 8 15, 3 - - 

5 43, 2 10, 1 41, 2 11, 0 39, 0 12, 1 36, 5 13, 3 33, 8 14, 6 32, 7 15, 2 

7 45, 8 10, 3 43, 7 11, 2 41, 3 12, 2 38, 8 13, 4 36, 0 14, 7 34, 8 15, 3 

9 48, 5 10, 4 46, 3 10, 6 43, 9 11, 7 41, 2 13, 5 38, 3 14, 9 37, 0 15, 4 

11 51, 2 10, 6 49, 0 11, 5 46, 4 12, 5 43, 6 13, 7 40, 6 15, 0 - - 

13 54, 1 10, 7 51, 7 11, 6 49, 0 12, 7 46, 1 13, 8 43, 0 15, 1 - - 

15 57, 0 10, 9 54, 5 11, 8 51, 8 12, 8 48, 7 14, 0 45, 4 15, 3 - - 

18 61, 5 11, 0 58, 9 11, 9 55, 9 13, 0 52, 7 14, 3 - - - - 

Ta = Dry bulb ext ernal air temper ature. 

Tue = Evaporat or outlet water t emperature(ΔT inlet/ outlet = 5 °C). 

QF = Cooling capacit y (exc hanger fouling fact or of 0.35 X 10 -4 m²C/W). 

P = Total abs orbed el ectrical power (compress or, fan and pump P1). 

31


performances 

Table “D”: THAEY cooling capacit y (ΔT = 5°C at the evaporator) 

Model 

115 

117 

122 

124 

127 

130 

133 

233 

238 

Tue (°C) 

Ta (°C) 

20 25 30 35 40 42 



5 17, 5 4,4 16, 6 4,9 15, 5 5,4 14, 5 6,0 13, 3 6,7 12, 8 7,0 

7 18, 6 4,5 17, 5 5,0 16, 4 5,5 15, 3 6,2 14, 1 6,8 13, 6 7.1 

9 19, 6 4,6 18, 5 5,1 17, 3 5,7 16, 1 6,3 14, 8 6,9 14, 3 7,2 

11 20, 6 4,7 19, 5 5,2 18, 3 5,8 17, 0 6,4 15, 7 7,1 - - 

13 21, 7 4,8 20, 5 5,3 19, 2 5,9 17, 9 6,5 16, 5 7,2 - - 

15 22, 8 4,9 21, 5 5,4 20, 2 6,0 18, 8 6,6 17, 3 7,3 - - 

18 24, 5 5,1 23, 1 5,6 21, 7 6,1 20, 2 6,7 - - - - 

5 19, 6 5,0 18, 6 5,5 17, 5 6,2 16, 4 6,9 15, 2 7,7 14, 7 8,1 

7 20, 8 5,1 19, 7 5,7 18, 6 6,3 17, 4 7,0 16, 1 7,8 15, 6 8,1 

9 22, 0 5,2 20, 9 5,8 19, 7 6,4 18, 4 7,1 17, 1 7,9 16, 6 8,2 

11 23, 2 5,4 22, 0 5,9 20, 8 6,6 19, 5 7,3 18, 1 8,0 - - 

13 24, 5 5,5 23, 3 6,1 22, 0 6,7 20, 6 7,4 19, 2 8,1 - - 

15 25, 8 5,6 24, 5 6,2 23, 1 6,8 21, 7 7,5 20, 2 8,3 - - 

18 27, 8 5,8 26, 4 6,4 25, 0 7,0 23, 4 7,7 - - - - 

5 24, 9 5,9 23, 6 6,5 22, 3 7,2 20, 9 8,5 19, 4 9,0 18, 7 9,4 

7 26, 6 6,0 25, 3 6,7 23, 8 7,4 22, 3 8,5 20, 6 9,1 20, 0 9,5 

9 28, 3 6,2 26, 8 6,8 25, 3 7,5 23, 7 8,5 22, 0 9,2 21, 3 9,5 

11 30, 0 6,3 28, 5 7,0 26, 9 7,7 25, 2 8,5 23, 3 9,3 - - 

13 31, 8 6,5 30, 1 7,1 28, 5 7,8 26, 6 8,5 24, 7 9,4 - - 

15 33, 6 6,7 31, 9 7,3 30, 0 8,0 28, 2 8,5 26, 2 9,6 - - 

18 36, 3 7,2 34, 4 7,9 32, 5 8,6 30, 5 9,5 - - - - 

5 26, 7 7,1 25, 3 7,9 23, 9 8,8 22, 3 9,9 20, 6 11, 0 19, 9 11, 4 

7 28, 3 7,3 26, 8 8,1 25, 3 8,9 24, 3 10, 0 21, 8 11, 1 21, 1 11, 5 

9 29, 9 7,4 28, 4 8,2 26, 8 9,1 25, 1 10, 1 23, 2 11, 2 22, 4 11, 6 

11 31, 6 7,6 30, 0 8,4 28, 3 9,2 26, 5 10, 2 24, 5 11, 3 - - 

13 33, 3 7,7 31, 6 8,5 29, 9 9,4 28, 0 10, 4 25, 9 11, 4 - - 

15 35, 0 7,9 33, 4 8,7 31, 5 9,6 29, 5 10, 5 27, 4 11, 6 - - 

18 37, 8 8,2 35, 9 9,0 33, 9 9,8 31, 9 10, 8 - - - - 

5 29, 7 7,9 28, 3 8,7 26, 6 9,7 24, 8 11, 1 22, 9 11, 8 22, 1 12, 3 

7 31, 5 8,1 29, 9 8,9 28, 2 9,8 26, 8 11, 1 24, 3 11, 9 23, 5 12, 4 

9 33, 3 8,2 31, 6 9,0 29, 8 9,9 27, 9 11, 1 25, 8 12, 0 24, 9 12, 5 

11 35, 1 8,4 33, 4 9,2 31, 6 10, 1 29, 5 11, 1 27, 3 12, 1 - - 

13 37, 0 8,5 35, 2 9,3 33, 3 10, 2 31, 1 11, 1 28, 8 12, 2 - - 

15 38, 9 8,7 37, 0 9,5 35, 0 10, 4 32, 8 11, 1 30, 4 12, 4 - - 

18 41, 9 8,9 39, 9 9,7 37, 7 10, 6 35, 3 11, 6 - - - - 

5 31, 9 9,2 30, 4 10, 1 28, 8 11, 1 27, 0 12, 2 25, 1 13, 4 24, 4 13, 9 

7 33, 8 9,4 32, 2 10, 3 30, 4 11, 3 29, 1 12, 6 26, 6 13, 6 25, 8 14, 1 

9 35, 6 9,6 34, 0 10, 5 32, 2 11, 5 30, 2 12, 6 28, 1 13, 8 27, 2 14, 3 

11 37, 5 9,8 35, 7 10, 7 33, 9 11, 7 31, 8 12, 8 29, 7 14, 0 - - 

13 39, 5 10, 0 37, 7 10, 9 35, 7 11, 9 33, 5 13, 0 31, 2 14, 3 - - 

15 41, 5 10, 2 39, 6 11, 1 37, 4 12, 1 35, 3 13, 2 32, 9 14, 5 - - 

18 44, 6 10, 5 42, 5 11, 4 40, 2 12, 4 37, 9 13, 5 - - - - 

5 37, 8 10, 5 36, 0 11, 5 34, 2 12, 6 32, 1 13, 8 29, 9 15, 1 29, 0 15, 7 

7 39, 9 10, 7 38, 1 11, 7 36, 2 12, 8 34, 0 14, 0 31, 7 15, 3 30, 8 15, 9 

9 42, 1 10, 9 40, 3 11, 9 38, 1 13, 0 35, 9 14, 2 33, 5 15, 6 32, 5 16, 1 

11 44, 5 11, 2 42, 5 12, 1 40, 3 13, 2 37, 9 14, 5 35, 4 15, 8 - - 

13 46, 8 11, 4 44, 7 12, 4 42, 4 13, 5 39, 9 14, 7 37, 3 16, 0 - - 

15 49, 2 11, 6 47, 0 12, 6 44, 6 13, 7 42, 0 14, 4 39, 3 16, 2 - - 

18 53, 0 11, 9 50, 5 12, 9 48, 0 14, 0 45, 3 15, 2 - - - - 

5 36, 5 9,4 34, 7 10, 3 32, 7 11, 5 30, 6 12, 8 28, 4 14, 3 27, 5 14, 9 

7 38, 6 9,6 36, 8 10, 6 34, 7 11, 7 32, 5 13, 0 30, 2 14, 4 29, 2 15, 0 

9 40, 9 9,8 38, 9 10, 8 36, 8 11, 9 34, 5 13, 2 32, 0 14, 6 31, 0 15, 2 

11 43, 2 10, 1 41, 1 11, 1 38, 8 12, 2 36, 5 13, 4 33, 9 14, 8 - - 

13 45, 5 10, 3 43, 3 11, 3 40, 9 12, 4 38, 5 13, 7 35, 8 15, 0 - - 

15 48, 0 10, 6 45, 6 11, 6 43, 2 12, 7 40, 6 13, 9 37, 8 15, 3 - - 

18 51, 7 10, 9 49, 2 11, 9 46, 6 13, 1 43, 9 14, 4 - - - - 

5 43, 2 10, 1 41, 2 11, 0 39, 0 12, 1 36, 5 13, 3 33, 8 14, 6 32, 7 15, 2 

7 45, 8 10, 3 43, 7 11, 2 41, 3 12, 2 38, 8 13, 4 36, 0 14, 7 34, 8 15, 3 

9 48, 5 10, 4 46, 3 10, 6 43, 9 11, 7 41, 2 13, 5 38, 3 14, 9 37, 0 15, 4 

11 51, 2 10, 6 49, 0 11, 5 46, 4 12, 5 43, 6 13, 7 40, 6 15, 0 - - 

13 54, 1 10, 7 51, 7 11, 6 49, 0 12, 7 46, 1 13, 8 43, 0 15, 1 - - 

15 57, 0 10, 9 54, 5 11, 8 51, 8 12, 8 48, 7 14, 0 45, 4 15, 3 - - 

18 61, 5 11, 0 58, 9 11, 9 55, 9 13, 0 52, 7 14, 3 - - - - 



QF = Cooling capacit y (exc hanger fouling fact or of 0,35 X 10 -4 m²C/W). 


32


performances 

Table “D”: THAEY heating capacit y (ΔT = 5°C at the conden ser) 

Model 

238 233 133 130 127 124 122 117 115 

Tuc (°C) 

35 40 45 50 53 

QT P QT P QT P QT P QT P 

kW kW kW kW kW kW kW kW kW kW 

-5 90 12, 8 4,7 12, 8 5,2 12, 7 5,8 - - - - 

0 90 14, 5 4,7 14, 4 5,2 14, 2 5,8 - - - - 

7 90 17, 4 4,7 17, 1 5,3 16, 8 6,0 16, 6 6,6 16, 4 7,0 

10 90 18, 8 4,7 18, 5 5,3 18, 1 6,0 17, 8 6,6 17, 6 7,1 

15 90 21, 4 4,8 20, 9 5,3 20, 4 6,0 20, 0 6,7 19, 7 7,2 

20 90 24, 2 4,8 23, 6 5,4 23, 0 6,0 22, 4 6,7 22, 1 7,2 

-5 90 13, 0 4,9 13, 1 5,7 13, 5 6,7 - - - - 

0 90 15, 0 5,0 15, 0 5,7 15, 1 6,7 - - - - 

7 90 18, 4 5,1 18, 1 5,8 17, 9 6,7 17, 8 7,6 17, 7 8,3 

10 90 20, 0 5,2 19, 6 5,8 19, 3 6,7 19, 0 7,6 18, 8 8,2 

15 90 22, 8 5,3 22, 3 5,9 21, 8 6,7 21, 3 7,5 21, 0 8,1 

20 90 26, 0 5,4 25, 3 6,0 24, 6 6,7 23, 9 7,5 23, 5 8,1 

-5 90 17, 1 6,2 17, 3 7,2 17, 9 8,7 - - - - 

0 90 20, 0 6,3 19, 9 7,2 20, 1 8,5 - - - - 

7 90 24, 5 6,4 24, 2 7,2 23, 9 8,5 23, 8 9,6 23, 8 10, 4 

10 90 26, 7 6,4 26, 2 7,2 25, 8 8,5 25, 4 9,4 25, 2 10, 2 

15 90 30, 6 6,5 29, 9 7,3 29, 1 8,5 28, 4 9,2 28, 0 9,9 

20 90 34, 8 6,6 33, 8 7,4 32, 8 8,5 31, 8 9,2 31, 2 9,8 

-5 90 19, 3 7,2 19, 4 8,3 19, 9 9,7 - - - - 

0 90 22, 2 7,3 22, 0 8,3 22, 1 9,6 - - - - 

7 90 27, 1 7,4 26, 6 8,3 26, 1 9,5 25, 8 10, 9 25, 7 11, 8 

10 90 29, 5 7,4 28, 9 8,4 28, 2 9,5 27, 7 10, 8 27, 3 11, 6 

15 90 33, 8 7,5 32, 9 8,4 32, 0 9,5 31, 1 10, 7 30, 5 11, 5 

20 90 38, 3 7,6 37, 3 8,5 36, 2 9,5 35, 0 10, 6 34, 2 11, 4 

-5 90 22, 8 8,2 22, 7 9,4 23, 1 10, 9 - - - - 

0 90 26, 3 8,3 25, 9 9,4 25, 8 10, 8 - - - - 

7 90 31, 9 8,4 31, 3 9,5 30, 7 10, 7 30, 2 12, 1 29, 9 13, 1 

10 90 34, 7 8,5 33, 9 9,5 33, 1 10, 7 32, 4 12, 0 31, 9 12, 9 

15 90 39, 5 8,6 38, 5 9,5 37, 5 10, 6 36, 4 11, 9 35, 7 12, 7 

20 90 44, 6 8,7 43, 5 9,6 42, 2 10, 6 40, 8 11, 8 39, 9 12, 6 

-5 90 25, 9 9,3 25, 6 10, 3 25, 5 11, 3 - - - - 

0 90 29, 6 9,4 29, 2 10, 4 28, 9 11, 5 - - - - 

7 90 35, 7 9,5 35, 1 10, 5 34, 4 11, 7 33, 8 12, 9 33, 3 13, 7 

10 90 38, 6 9,6 37, 9 10, 6 37, 1 11, 8 36, 3 13, 0 35, 8 13, 9 

15 90 43, 8 9,7 42, 9 10, 7 41, 9 11, 9 40, 9 13, 2 40, 1 14, 1 

20 90 49, 5 9,8 48, 3 10, 8 47, 1 12, 0 45, 8 13, 3 44, 9 14, 2 

-5 90 29, 5 11, 1 29, 4 12, 3 29, 3 13, 5 - - - - 

0 90 33, 6 11, 2 33, 2 12, 4 32, 8 13, 7 - - - - 

7 90 40, 7 11, 4 39, 9 12, 6 39, 1 14, 0 38, 2 15, 5 37, 8 16, 5 

10 90 44, 1 11, 5 43, 2 12, 7 42, 3 14, 1 41, 3 15, 6 40, 7 16, 6 

15 90 50, 3 11, 7 49, 0 12, 9 47, 9 14, 3 46, 6 15, 8 45, 7 16, 8 

20 90 56, 8 11, 8 55, 4 13, 0 53, 9 14, 4 52, 3 15, 9 51, 3 16, 9 

-5 90 28, 2 9,7 28, 4 11, 2 29, 0 13, 1 - - - - 

0 90 31, 9 9,8 31, 9 11, 2 32, 1 13, 0 - - - - 

7 90 38, 7 10, 1 38, 0 11, 4 37, 5 13, 0 37, 1 14, 8 37, 0 16, 1 

10 90 42, 2 10, 2 41, 3 11, 5 40, 4 13, 0 39, 7 14, 7 39, 3 15, 9 

15 90 48, 3 10, 4 47, 1 11, 7 45, 9 13, 1 44, 7 14, 7 43, 9 15, 7 

20 90 55, 0 10, 6 53, 5 11, 8 52, 0 13, 2 50, 4 14, 7 49, 4 15, 7 

-5 90 31, 9 10, 8 31, 9 12, 0 - - - - - - 

0 90 36, 0 10, 8 35, 8 12, 1 35, 7 13, 5 - - - - 

7 90 43, 6 10, 9 42, 6 12, 1 41, 7 13, 5 41, 0 15, 1 40, 6 16, 1 

10 90 47, 5 11, 0 46, 2 12, 2 45, 0 13, 5 43, 9 15, 1 43, 3 16, 1 

15 90 54, 2 11, 1 52, 8 12, 2 51, 2 13, 6 49, 5 15, 0 48, 4 16, 0 

20 90 61, 6 11, 2 59, 8 12, 3 57, 9 13, 6 55, 8 15, 1 54, 4 16, 0 

Ta (°C) 

UR (%) 

Tuc = Condens er outlet water temperature(ΔT inlet/ outlet = 5 °C). 


RH = Relative humi dity. 

QT = Heating capacit y (exchanger f ouling fac tor of 0, 35 X 10 -4 m²C/W). 


33


performances 

RC100 and DS15 accessories: performances and pressure drops 

Tabl e ”G”: Performan ces and pr essur e drops of the RC100 and DS15 accessori es 

TCAEY-THAEY MODEL 133 233 

RC100 - 100% recover y 

Wat er inlet/ outlet t emper ature °C 35/ 40 (**) 40/ 45 (*) 45/ 50 (**) 35/ 40 (**) 40/ 45 (*) 45/ 50 (**) 

Nominal heating capacity (•) kW 44, 3 43, 3 42, 4 41, 2 40, 3 39, 4 

Recover y nominal fl ow m³/h 7620 7448 7293 7086 6932 6777 

Recover y nominal pressure drops kP a 3,7 3,5 3,4 3,2 3,0 2,9 

Recover y wat er content l 3,1 3,1 3,1 3,1 3,1 3,1 

Recover y wat er connections Ø 1” ½ 1” ½ 

DS - Desuperh eater 

Water inlet/outlet temper ature °C 50/60 (***) 60/70 (***) - 50/60 (***) 60/70 (***) - 

Nominal heating capacity (•) kW 10, 1 7,2 - 10, 0 6,9 - 

Desuperheater nominal water fl ow m³/h 900 600 - 900 600 - 

Desuperheater nominal pressur e drops kP a 5,0 3,0 - 5,0 3,0 - 

Desuperheater water cont ent. l 0,45 0,45 - 0,45 0,45 - 

Desuperheater water connections Ø 1” ½ 1” ½ 

(•) Heating capacit y wit h rec over y and 

desuperheat er fouling fac tor equi val ent to 

0,35x10 -4 m² K/ W. 

(*) Conditions referred t o the unit 

complete wit h c ondens ation control 

(FI10) wit h st andard c alibration, c hilled 

wat er temperat ure of 7°C and evaporat or 

temperature differ ential of 5K. 

(**) Conditions ref er to the unit compl ete 

with c ondensati on c ontr ol (FI10), wit h 

suitabl e calibration ( expressl y requested 

when the order is made), chilled water 

temperature of 7°C and temperatur e 

difference at t he evapor ator of 5K. 

(***) Conditions ref er to the unit with 

chilled wat er temperat ure of 7°C and 

temperature differ ence at the evaporat or 

of 5K. 

Operating limits: 

RC100: 

• hot water t emperature of 35-50°C with 

permitt ed water temperature diff erential 

of 4÷6K; 

• the mini mum permitt ed water i nlet 

temperature is 30°C. 

DS: 

• hot water t emperature of 50÷ 70°C 

with per mitted wat er temperat ure 

differential of 5÷10K; 

• the mini mum permitt ed water i nlet 

temperature is 40°C. 

With t he access or y RC100 t he unit is 

equipped with the acc essor y FI 10. 

Attention 

Units fitted with a permanent recovery 

unit or des uperheater i n series wit h the 

compressor must be us ed in compliance 

with the regulations s et out by Ministerial 

Decree 1/12/1975 “Saf et y r egulations for 

appliances c ontaining hot press urized 

fluids” and by its t echnical applicati on 

specificati ons (collec tions R and H). 

This law is only valid in the Italian 

Republic. In the event of installation in 

other countries, pleas e keep to the loc al 

laws in force. 

Hot wat er for domestic use c an be 

produc ed onl y wit h t he use of an 

additi onal heat exchanger which is suited 

to t he purpose. Refer to c urrent l aws and 

standards i n the place of i nstallation. 

34


TCAEY-THAEY pressure drops and residual static 

pressure 

1000 

100 

10 

Graph “1”: pr essur e drops, TCAEY-THAEY 115÷238 

condenser/evaporator 

130 

133,233,238 

122 

124 

127 

1 

1000 10000 

G (l/h) 

Δpw ( kPa) = nominal press ure drop at t he exchanger in question (table 

on Tec hnic al data): 

G (l/h) = water fl ow rate at the exc hanger in questi on; 

Graph “2”: r esidu al st atic pr essur e TC AEY-THAEY 115÷238 

P1-P2 instal lation 

200 

190 

180 

170 

160 

150 

140 

130 

120 

110 

100 

90 

80 

130 P1 

127 P1 

70 

60 

124 P1 

50 

40 

115-117 P1 

122 P1 

2500 3000 3500 4000 4500 5000 5500 6000 

G (l/h) 

performances 

Calculation of pr essur e drops 

The wat er flow rate at t he exchanger is c alculat ed accordi ng to t he 

followi ng formula: 

○ G = (Q x 860) : ΔT 

• Wher e: 

G (l/h) = water fl ow rate at the exc hanger; 

Q (kW) = exchanged power, which may be QF (for the evaporat or) or 

QT (for the condens er), depending on t he exchanger in question; 

ΔT (°C) = temperature diff erential; 

○ The pr essure drops can be obtai ned from t he RHOSS selection 

soft ware and can be read on the graph to the side, or c an be calculated 

using the following rough for mula: 

Δpw = Δpw nom x (G : G nom )² 

N.B.: 

For all machines, ref er in any c ase to admissible operating limits and 

thermal dif ferences (ΔT). 

Graph “2”: r esidu al st atic pr essur e TC AEY-THAEY 115÷238 

ASP1-ASP2 installation 

200 

190 

180 

170 

160 

150 

140 

130 

120 

110 

100 

90 

80 

70 

60 

130 ASP1 

50 

115-117 ASP1 122 ASP1 124 ASP1 127 ASP1 

40 

2500 3000 3500 4000 4500 5000 5500 6000 

G (l/h) 

250 

250 

200 

133,233,238 P2 

200 

133,233,238 ASP2 

150 

150 

100 

133,233,238 P1 

100 

133,233,238 ASP1 

50 

1000 2000 3000 4000 5000 6000 7000 8000 9000 

G (l/h) 

Δpr = Residual st atic pressure 

G = Water flow rate 

50 

1000 2000 3000 4000 5000 6000 7000 8000 9000 

G (l/h) 

Δpr = Residual st atic pressure 

G = Water flow rate 

Calculation of r esidu al st atic pr essur e 

The residual st atic pressure values can be obt ained from graph “2” based on measured flow rates. 

35

TXAEY 117÷133 

performances 

Performance data for TXAEY 117÷133 models 

Table “D”: TXAEY cooling capacit y (ΔT = 5°C at the evaporator) – AUTOMATIC 1 

Model 

133 130 124 117 

Tue (°C) 

Ta (°C) 

20 25 30 35 40 42 



5 19, 6 5,0 18, 6 5,5 17, 5 6,2 16, 4 6,9 15, 2 7,7 14, 7 8,1 

7 20, 8 5,1 19, 7 5,7 18, 6 6,3 17, 4 7,0 16, 1 7,8 15, 6 8,1 

9 22, 0 5,2 20, 9 5,8 19, 7 6,4 18, 4 7,1 17, 1 7,9 16, 6 8,2 

11 23, 2 5,4 22, 1 5,9 20, 8 6,6 19, 5 7,2 18, 1 8,0 - - 

13 24, 5 5,5 23, 3 6,1 22, 0 6,7 20, 6 7,4 19, 2 8,1 - - 

15 25, 8 5,6 24, 5 6,2 23, 1 6,8 21, 7 7,5 20, 2 8,3 - - 

5 26, 7 7,1 25, 3 7,9 23, 8 8,8 22, 2 9,8 20, 5 11, 0 19, 8 11, 4 

7 28, 2 7,3 26, 8 8,1 25, 3 9,0 23, 6 9,9 21, 8 11, 0 21, 1 11, 5 

9 29, 9 7,4 28, 4 8,2 26, 8 9,1 25, 0 10, 1 23, 1 11, 1 22, 4 11, 6 

11 31, 5 7,6 30, 0 8,4 28, 3 9,2 26, 5 10, 2 24, 5 11, 3 - - 

13 33, 3 7,8 31, 7 8,5 29, 9 9,4 28, 0 10, 4 25, 9 11, 4 - - 

15 35, 0 7,9 33, 3 8,7 31, 5 9,6 29, 5 10, 5 27, 3 11, 6 - - 

5 31, 9 9,2 30, 4 10, 1 28, 8 11, 1 27, 0 12, 2 25, 1 13, 4 24, 4 13, 9 

7 33, 8 9,4 32, 2 10, 3 30, 4 11, 3 28, 6 12, 4 26, 6 13, 6 25, 8 14, 1 

9 35, 6 9,6 34, 4 10, 5 32, 2 11, 5 30, 2 12, 6 28, 1 13, 8 27, 2 14, 3 

11 37, 5 9,8 35, 7 10, 7 33, 9 11, 7 31, 8 12, 8 29, 7 14, 0 - - 

13 39, 5 10, 0 37, 7 10, 9 35, 7 11, 9 33, 5 13, 0 31, 2 14, 2 - - 

15 41, 5 10, 2 39, 6 11, 1 37, 4 12, 1 35, 3 13, 2 32, 9 14, 4 - - 

5 37, 7 10, 5 36, 0 11, 4 34, 2 12, 6 32, 1 13, 8 30, 0 15, 1 29, 1 15, 7 

7 40, 0 10, 7 38, 1 11, 7 36, 2 12, 8 34, 0 14, 0 31, 8 15, 3 30, 8 15, 9 

9 42, 2 10, 9 40, 3 11, 9 38, 2 13, 0 36, 0 14, 2 33, 6 15, 6 32, 6 16, 1 

11 44, 5 11, 1 42, 5 12, 1 40, 3 13, 2 37, 9 14, 5 35, 4 15, 8 - - 

13 46, 8 11, 4 44, 7 12, 3 42, 4 13, 5 40, 0 14, 7 37, 4 16, 0 - - 

15 49, 3 11, 6 47, 0 12, 6 44, 7 13, 7 42, 0 14, 9 39, 4 16, 3 - - 



QF = Cooling capacit y (exc hanger fouling fact or of 0,35 X 10 -4 m²C/W). 


36

TXAEY 117÷133 

performances 

Table “D”: TXAEY cooling and heating capacit y with heat recovery (ΔT = 5°C at the evaporator) – AUTOMATIC 2 

133 130 124 117 Model 

Tue (°C) 

Tuc (°C) 

30 35 40 45 50 53 

Qf Qt P Qf Qt P Qf Qt P Qf Qt P Qf Qt P Qf Qt P 

kW kW kW kW kW kW kW kW kW kW kW kW kW kW kW kW kW kW 

5 18, 8 21, 1 4,1 17, 8 20, 7 4,3 16, 8 20, 2 4,8 15, 6 19, 8 5,4 14, 3 19, 4 6,1 13, 5 19, 1 6,9 

7 19, 5 22, 3 7,4 18, 5 21, 8 4,4 16, 6 21, 3 4,9 15, 7 20, 8 5,5 14, 9 20, 3 6,1 13, 8 20, 0 6,9 

9 21, 3 23, 5 7,4 20, 2 23, 0 4,4 19, 1 22, 4 4,9 17, 8 21, 9 5,5 16, 4 21, 3 6,2 15, 5 20, 9 6,9 

11 22, 7 24, 8 4,5 21, 5 24, 2 5,0 20, 3 23, 6 5,5 18, 9 23, 0 6,2 17, 5 22, 3 7,0 16, 5 21, 9 7,4 

13 24, 1 26, 1 4,5 22, 9 25, 5 5,0 21, 6 24, 8 5,6 20, 1 24, 1 6,2 18, 6 23, 4 7,0 17, 7 23, 0 7,5 

15 25, 5 27, 5 4,6 24, 3 26, 8 5,1 22, 9 26, 1 5,6 21, 4 25, 4 6,3 19, 8 24, 5 7,0 18, 8 24, 1 7,5 

5 28, 2 31, 1 5,4 26, 7 30, 3 6,2 25, 1 29, 6 7,0 22, 5 28, 9 7,8 21, 3 28, 1 8,8 20, 0 27, 6 10, 0 

7 30, 0 32, 8 10, 7 28, 5 32, 0 6,3 26, 8 31, 2 7,0 23, 1 30, 4 7,9 22, 8 29, 5 8,8 21, 5 28, 9 9,9 

9 31, 9 34, 5 10, 7 30, 4 33, 7 6,3 28, 6 32, 8 7,0 26, 6 32, 0 7,9 24, 4 30, 9 8,8 23, 0 30, 3 9,9 

11 33, 9 36, 4 6,4 32, 3 35, 5 7,1 30, 4 34, 6 7,9 28, 3 33, 5 8,9 26, 1 32, 4 9,9 24, 5 31, 7 10, 6 

13 35, 9 38, 3 6,4 34, 3 37, 4 7,1 32, 4 36, 3 8,0 30, 2 35, 3 8,9 27, 8 34, 0 10, 0 26, 1 33, 2 10, 7 

15 38, 0 40, 3 6,5 36, 4 39, 3 7,2 34, 3 38, 2 8,0 32, 1 37, 0 8,9 29, 5 35, 6 10, 0 27, 9 34, 8 10, 7 

5 30, 6 37, 8 8,0 29, 0 37, 1 8,8 27, 1 36, 3 9,7 25, 1 35, 5 10, 8 22, 9 34, 6 12, 0 21, 4 34, 0 12, 8 

7 32, 9 39, 9 8,0 31, 2 39, 0 8,9 29, 2 38, 2 9,8 27, 1 37, 2 10, 5 24, 7 36, 2 12, 1 23, 2 35, 6 12, 9 

9 35, 2 42, 0 8,1 33, 4 41, 1 8,9 31, 4 40, 1 9,9 29, 1 39, 1 10, 9 26, 6 38, 0 12, 2 25, 0 37, 3 13, 0 

11 37, 7 44, 2 8,2 35, 7 43, 2 9,0 33, 6 42, 2 9,9 31, 2 41, 0 11, 0 28, 6 39, 8 12, 2 26, 9 39, 1 13, 0 

13 40, 2 46, 5 8,3 38, 2 45, 4 9,1 35, 9 44, 3 10, 0 33, 5 43, 0 11, 0 30, 7 41, 7 12, 3 29, 0 40, 9 13, 1 

15 42, 8 48, 9 8,4 40, 7 47, 6 9,1 38, 3 46, 4 10, 0 35, 7 45, 1 11, 1 32, 9 43, 6 12, 3 31, 1 42, 8 13, 1 

5 36, 6 44, 9 9,5 34, 6 44, 0 10, 4 32, 4 43, 0 11, 6 30, 1 42, 0 12, 8 27, 4 41, 0 14, 3 25, 8 40, 4 15, 2 

7 39, 3 47, 3 9,6 37, 2 46, 3 10, 5 34, 9 45, 3 11, 6 32, 4 44, 2 12, 9 29, 6 43, 0 14, 3 27, 9 42, 3 15, 3 

9 42, 1 49, 9 9,7 39, 9 48, 8 10, 6 37, 5 47, 6 11, 7 34, 9 46, 4 13, 0 31, 9 45, 2 14, 4 30, 1 44, 3 15, 4 

11 39, 7 52, 5 9,8 37, 4 51, 4 10, 7 34, 9 50, 1 11, 8 32, 1 48, 7 13, 0 29, 0 47, 3 14, 5 27, 1 46, 4 15, 4 

13 42, 7 55, 3 9,9 40, 3 54, 0 10, 8 37, 6 52, 5 11, 8 34, 7 51, 1 13, 1 31, 5 49, 5 14, 5 29, 5 48, 5 15, 5 

15 45, 8 58, 2 10, 0 43, 3 56, 6 10, 8 40, 5 55, 2 11, 9 37, 4 53, 5 13, 2 34, 0 51, 9 14, 6 32, 0 50, 8 15, 5 

Tue = Evaporat or outlet water t emperature 

(ΔT inlet/outlet = 5 °C). 

Tuc = Condens er outlet water temperature 

(ΔT inlet/outlet = 5 °C). 

QF = Cooling capacity (evaporator fouling 

factor of 0,35 X 10 -4 m²C/W). 

QT = Heating capacit y (evaporat or fouling 

factor of 0,35 X 10 -4 m²C/W). 

P = Total abs orbed el ectrical power 

(compress or and pump). 

Nominal conditions of winter operation S1, 

S2 and A3 

Condenser i nlet/ outl et water 40°C/45°C, 

evaporat or inlet water 10°C, water fl ow rate as 

for summer operati on. 

Nominal recovery conditions A2 

Condenser i nlet/ outl et water 40/45°C, 

evaporat or inlet/ outl et water 12/ 7°C. 

ATTENTION ! 

The t emperature differ ential ΔT of t he inl et and 

outlet wat er temperat ure at t he evaporat or 

shoul d be bet ween 3°C and 8°C. 

Nominal conditions of summer operation A1 

Evaporator i nlet/ outl et wat er 12°C/7°C, 

condens er inlet/ outlet water 30°C/ 35°C. 

37

TXAEY 117÷133 

performances 

Table “D”: TXAEY h eating capacit y (ΔT = 5°C at the conden ser) – SELECT 1, SELECT 2, AUTOMATIC 3 

Model 

133 130 124 117 

Ta (°C) 

RH (%) 

Tuc (°C) 

35 40 45 50 53 

QT P QT P QT P QT P QT P 

kW kW kW kW kW kW kW kW kW kW 

-5 90 13, 3 4,8 13, 4 5,6 13, 8 6,7 - - - - 

0 90 15, 1 4,9 15, 0 5,7 15, 2 6,6 - - - - 

7 90 18, 4 5,1 18, 1 5,8 17, 9 6,7 17, 7 7,6 17, 7 7,6 

10 90 20, 0 5,2 19, 6 5,9 19, 3 6,7 18, 9 7,6 18, 9 7,6 

15 90 22, 9 5,3 22, 3 6,0 21, 8 6,7 21, 2 7,6 21, 2 7,6 

20 90 25, 9 5,4 25, 2 6,1 24, 5 6,8 23, 8 7,6 23, 8 7,6 

-5 90 19, 9 7,2 20, 0 8,3 20, 4 9,6 - - - - 

0 90 22, 6 7,3 22, 5 8,3 22, 7 9,6 - - - - 

7 90 26, 7 7,4 26, 3 8,4 26, 1 9,5 26, 0 10, 9 25, 9 11, 7 

10 90 29, 0 7,4 28, 4 8,4 27, 8 9,5 27, 6 10, 8 27, 4 11, 6 

15 90 33, 1 7,5 32, 2 8,5 31, 3 9,5 30, 3 10, 7 29, 9 11, 5 

20 90 37, 5 7,7 36, 5 8,6 35, 3 9,6 34, 1 10, 7 33, 3 11, 5 

-5 90 25, 9 9,2 25, 7 10, 2 25, 6 11, 2 - - - - 

0 90 29, 6 9,3 29, 3 10, 3 28, 9 11, 4 - - - - 

7 90 35, 7 9,5 35, 1 10, 5 34, 4 11, 7 33, 7 12, 9 33, 3 13, 8 

10 90 38, 6 9,5 37, 8 10, 6 37, 1 11, 8 36, 3 13, 1 35, 7 13, 9 

15 90 43, 8 9,7 42, 8 10, 8 41, 8 12, 0 40, 7 13, 3 40, 0 14, 2 

20 90 49, 4 9,9 48, 1 10, 9 46, 9 12, 1 45, 5 13, 5 44, 7 14, 4 

-5 90 30, 2 11, 0 30, 0 12, 2 29, 8 13, 5 - - - - 

0 90 34, 2 11, 1 33, 9 12, 4 33, 5 13, 7 - - - - 

7 90 40, 4 11, 3 39, 8 12, 6 39, 1 14, 0 38, 5 15, 6 38, 2 16, 6 

10 90 43, 7 11, 5 42, 8 12, 7 42, 0 14, 1 41, 2 15, 7 40, 7 16, 7 

15 90 49, 7 11, 7 48, 5 12, 9 47, 2 14, 3 45, 9 15, 9 45, 2 17, 0 

20 90 56, 2 11, 9 54, 7 13, 1 53, 2 14, 5 51, 5 16, 1 50, 5 17, 1 

Tuc = Condens er outlet water temperature(ΔT inlet/ outlet = 5 °C). 


RH = Relative humi dity. 

QT = Heating capacit y (exchanger f ouling fac tor of 0, 35 X 10 -4 m²C/W). 


38

TXAEY 117÷133 

performances 

TXAEY pressure drops and residual static pressure 

Graph “1”: pr essur e drops, TXAEY 117÷133 h eat exch angers 

1000 

124 

100 

133 

117 

10 

130 

Calculation of pr essur e drops 

The wat er flow rate at t he exchanger is c alculat ed accordi ng to t he 

followi ng formula: 

○ G = (Q x 860) : ΔT 

• Wher e: 

G (l/h) = water fl ow rate at the exc hanger; 

Q (kW) = exchanged power, which may be QF (for the evaporat or) or 

QT (for the condens er), depending on t he exchanger in question; 

ΔT (°C) = temperature diff erential; 

○ The pr essure drops can be obtai ned from t he RHOSS selection 

soft ware and can be read on the graph to the side, or c an be calculated 

using the following rough for mula: 

Δpw = Δpw nom x (G : G nom )² 

1 

1000 10000 

G (l/h) 

N.B.: 

For all machines, ref er in any c ase to admissible operating limits and 

thermal dif ferences (ΔT). 

Δpw ( kPa) = nominal press ure drop at t he exchanger in question (table 

on Tec hnic al data): 

G (l/h) = water fl ow rate at the exc hanger in questi on; 

Graph “2”: 

TXAEY 117÷133 r esidu al static pr essure, instal lation P1-P2 

250 

240 

230 

133 P2 

220 

210 

200 

190 

180 

170 

160 

150 

140 

130 

133 P1 

120 

110 

100 

90 

130 P1 

80 

70 

60 

124 P1 

50 

117 P1 

40 

2500 3000 3500 4000 4500 5000 5500 6000 

G (l/h) 

Δpr (kPa) = Resi dual static pressur e 

G (l/h) = Water flow 

Graph “2”: 

TXAEY 117÷133 r esidu al static pr essure, instal lation ASP1-ASP2 

250 

240 

230 

220 

210 

200 

133 ASP2 

190 

180 

170 

160 

150 

140 

130 

120 

110 

100 

133 ASP1 

90 

80 

70 

60 

50 

40 

2500 3000 3500 4000 4500 5000 5500 6000 

G (l/h) 

Δpr (kPa) = Resi dual static pressur e 

G (l/h) = Water flow 

Calculation of r esidu al st atic pr essur e 

The residual st atic pressure values can be obt ained from graph “2” based on measured flow rates. 

39

TCAEY-THAEY 115÷238 / TXAEY 117÷133 

operating limits 

Operating limits for TCAEY-THAEY models 



40 

50 

20 

45 

0 

-5 

5 10 15 

40 

35 

-10 

-5 0 5 10 15 20 40 

Standard operati on 

Operati on wit h condens ation control 

(KFI accessory) 

T (°C) = Air temperat ure 

t (°C) = Water t emperat ure 

In summer operation: 

Maxi mum inlet wat er temperat ure 25°C 

Temperature differentials permitted through the exchangers 

Temperat ure dif ferential at t he evaporator ΔT = 3 ÷ 8°C 

○ Minimum wat er pressur e 0. 5 Barg 

○ Maximum water pressure 3 Barg 

Standard operati on 


(KFI accessory) 

T (°C) = Air temperat ure 


In winter operation: 

Maxi mum inlet wat er temperat ure 47°C 

Temperature differentials p ermitted through the exchangers 

Temperat ure dif ferential at t he c ondenser ΔT = 3 ÷ 8°C 



N.B.: 

For evaporat or outlet water of a t emperat ure below 4°C, pleas e cont act 

the RHOSS S.p.A. pr e-sales s ervice before ordering. 

Operating limits for TXAEY models 117÷133 

Operation as chill er 

(AUTOMATIC 1 mode) 

Operation as heat pump 

(SELECT 1/SELECT 2/AUTOMATIC 3 mode) 

Operation as chill er with heat recover y 

(AUTOMATIC 2 mode) 

40 

50 

50 

20 

0 

-5 

-10 

5 10 15 

40 

35 

45 

-5 0 5 10 15 20 40 

40 

30 

20 

10 

0 

5 10 15 

T (°C) = Air temperature (B.S.). 

t (°C) = Water t emperat ure. 

Maxi mum inlet wat er temperat ure 

25°C. 

T (°C) = Air temperature (B.S.). 


tue (°C) = Main exchanger (evaporator) outlet chilled 

wat er temperat ure. 

tur (°C) = Secondar y exchanger (recover y) outlet 

heated wat er temperatur e. 

Standard operati on. 


Temperature differentials permitted through the exchangers 

Temperat ure dif ferential at t he exchangers ΔT = 3 ÷ 8°C 



N.B.: 

For evaporat or outlet water of a t emperat ure below 4°C, pleas e cont act 

the RHOSS S.p.A. pr e-sales s ervice before ordering. 

40

0 OFF 

I ON 


dimensions and footprints 

Dimensions and footprints 

o 

p 

TCAEY – THAEY 115÷130 dimensions and footprints, P1 installation 

a 

c 

6 

2 

1 

3 

8 

e 

10 

9 

n 

m 

11 

12 

14 

13 

15 

6 

4 

5 

i 

l 

i 

7 

b 

7 

f d g h 

g 

Model a b c d e f g h i l m n o p 

115 mm 1230 1255 500 580 1090 60 20 1192 82 340 150 196 122 56 

117 mm 1230 1255 500 580 1090 60 20 1192 82 340 150 196 122 56 

122 mm 1230 1255 500 600 1280 60 20 1192 82 340 150 196 122 56 

124 mm 1230 1255 500 600 1280 60 20 1192 82 340 150 196 122 56 

127 mm 1535 1555 600 695 1510 60 20 1492 82 440 176 170 137 70 

130 mm 1535 1555 600 695 1510 60 20 1492 82 440 176 170 137 70 

1. Control panel; 

2. Isolat or; 

3. Electrical board; 

4. Compressor; 

5. Pump; 

6. Fan; 

7. Anti-vi bration support (KSA acc essor y); 

8. Coil; 

9. Protecti on mes h (KRP access ory); 

10. Expansion vessel; 

11. Power suppl y inl et; 

12. Water outlet; 

13. Water inlet; 

14. Pressure gauge 

15. Condensation drain (THAEY models) 

Installation 

○ The unit is designed for outdoor inst allation. 

○ The unit is equipped wit h male threaded water connections. 

○ The unit must be positioned to c ompl y with the mi nimum 

recommended cl earances, bearing in mind the acc ess t o wat er and 

electrical connections . 

○ The unit c an be equipped wit h anti- vibration mountings on request 

(KSA). 

○ We recommend installing intercept valves that isolate the unit fr om 

the res t of the s yst em. 

○ It is ess ential to fit a metal mes h filter (squar e mesh of no greater 

than 0. 8 mm) on the unit ret urn piping. 

○ The unit may not be inst alled on brac kets or shel ves. 

○ Correct installation and positioning includes levelling the unit on a 

surface c apable of bearing its weight. 

L4 

Clearances and positioning 

L3 

Model 115 117 122 124 127 130 

L1 mm 300 300 300 300 400 400 

L2 mm 600 600 600 600 600 600 

L3 mm with open outlet 

L4 mm 300 300 300 300 300 300 

Movement 

○ The unit s houl d be handled with c are, in order to avoi d damage t o 

the exter nal struc ture and t o t he internal mechanical and el ectrical 

components. 

○ Do not stack the units. 

○ The t emperature li mits for s torage are -9° ÷45°C. 

L1 

L2 

Weights 

Model 115 117 122 124 127 130 

TCAEY kg 170 180 230 240 300 330 

THAEY kg 175 185 238 248 310 340 

The weights refer t o pac kaged units without water. 

41

0 OFF 

I ON 



TCAEY – THAEY 115÷130 dimensions and footprints, ASP1 installation 

o 

p 

a 

c 

6 

2 

1 

3 

17 

8 

e 

10 

9 

n 

m 

11 

12 

14 

13 15 16 

6 4 

5 

i 

l 

i 

7 b 

7 

f 

d g h 

g 


115 mm 1490 1522 500 580 1090 60 20 1448 82 340 150 196 122 56 

117 mm 1490 1522 500 580 1090 60 20 1448 82 340 150 196 122 56 

122 mm 1490 1522 500 600 1280 60 20 1448 82 340 150 196 122 56 

124 mm 1490 1522 500 600 1280 60 20 1448 82 340 150 196 122 56 

127 mm 1790 1822 600 695 1510 60 20 1748 82 440 150 196 122 56 

130 mm 1790 1822 600 695 1510 60 20 1748 82 440 150 196 122 56 


2. Isolat or; 



5. Pump; 

6. Fan; 


8. Coil; 







15. Wat er buffer t ank drain; 

16. Condensation drain (THAEY models); 

17. Water buffer tank. 

Installation 







(KSA). 








L4 


L3 

Model 115 117 122 124 127 130 

L1 mm 300 300 300 300 400 400 

L2 mm 600 600 600 600 600 600 


L4 mm 300 300 300 300 300 300 

L1 

Movement 



components. 



L2 

Weights 

Model 115 117 122 124 127 130 

TCAEY kg 210 220 270 280 310 370 

THAEY kg 215 225 278 288 320 380 


The weight of t he full unit is obt ained by adding t o t he weight of the tank 

wat er contents, i ndicated in t abl e “A”. 

42

0 OFF 

I ON 



TCAEY – THAEY 133÷233 dimensions and footprints, Standard, P1 – P2, ASP1 – ASP2 installation 

p 

6 6 

c 

a 

1 

2 3 

8 

l 

5 

e 

9 

11 

14 

17 

12 

10 o 

4 4 

13 

n 

15 

16 

7 7 

m l 

b 

f 

d 

g h 

i 


133 mm 1660 1710 1000 1045 1570 75 273 1210 179 30 942 232 196 385 

233 mm 1660 1710 1000 1045 1570 75 273 1210 179 30 942 232 196 385 


2. Isolat or; 



5. Pump (P1 – P2, ASP1 – ASP2 installation); 

6. Fan; 


8. Coil; 







15. Wat er buffer t ank drain (ASP1 – ASP2 i nstallati on); 

16. Condensation drain (THAEY models); 

17. Water buffer tank (ASP1 – ASP2 i nstallati on); 

Installation 







(KSA). 








L4 


L3 

L1 

Model 133 233 

L1 mm 800 800 

L2 mm 1000 1000 

L3 mm 800 800 

L4 mm 800 800 

Movement 



components. 



L2 

Weights 

Model 133 233 

TCAEY Standard installation kg 400 415 

THAEY Standard installation kg 415 430 

TCAEY P1 installation kg 420 430 

THAEY P1 installation kg 435 445 



TCAEY ASP1 installation kg 450 465 

THAEY ASP1 installation kg 460 475 



The weights refer t o units without wat er. 



43

0 OFF 

I ON 



TCAEY – THAEY 133÷233 dimensions and footprints, with DS15/RC100 accessories 

r s 

6 6 

c 

a 

2 3 

1 

8 

l 

5 

e 

9 

13 14 

11 

16 

10 o 

15 

4 4 

q 

18 

17 

12 

p n 

19 

7 7 

m l 

b 

f 

d 

g h 

i 

Model a b c d e f g h i l m n o p q 

133-233 mm 1660 1710 1000 1045 1570 75 273 1210 179 30 942 235 196 175 100 


2. Isolat or; 



5. Pump 

(P1 – P2, ASP1 – ASP2 inst allation); 

6. Fan; 


8. Coil; 



11. Water buffer tank 

(ASP1 – ASP2 installation); 

12. Wat er buffer t ank drain 

(ASP1 – ASP2 installation); 



15. DS15/RC100 water inlet; 

16. Primar y water inlet; 

17. DS15/RC100 water outlet; 

18. Primar y wat er outlet; 

19. Condensation drain; 

Installation 







(KSA). 








Weights 

Model 133 233 

TCAEY Standard installation kg 400 415 

THAEY Standard installation kg 415 430 









DS15 kg 20 20 

RC100 kg 60 60 




L4 


L3 

L1 

Model 133 233 

L1 mm 800 800 

L2 mm 1000 1000 

L3 mm 800 800 

L4 mm 800 800 

Movement 



components. 



L2 

44

OFF 

ON 



TCAEY – THAEY 238 installation dimensions and footprints 

b 

c 

14 

2 3 

4 

1 

15 15 

a 

d 

4 

e 

f 

9 

8 

11 

5 7 

10 

6 

13 

12 

16 

g h 16 i h l m n 

Model a b c d e f g h i l m n 

238 mm 1565 1070 2315 75 195 233 385 28 942 544 1562 160 


2. Isolat or; 







9. Pump housi ng (ASDP1/ ASDP2 inst allation); 

10. Pump housi ng (P1/P2 – ASP1/ ASP2 ins tallations); 

11. Water buffer tank (ASP1/ASP2 – ASDP1/ASD P2 ins tallati ons); 

12. Expansion tank; 

13. Sys tem wat er drain; 

14. Fan; 

15. Finned coil; 

16. Anti-vi bration support (KSA acc essor y). 

Installation 







(KSA). 

○ We recommend installing isolating valves that isolate the unit from 







L4 


L1 

L3 

Model 238 

L1 mm 800 

L2 mm 800 

L3 mm 1000 

L4 mm 800 

Movement 

○ Movement of the unit shoul d be performed wit h car e, in order to 

avoid damage to the ext ernal s tructur e and to t he inter nal mec hanic al 

and electrical c omponents. 


○ The t emperature li mits for s torage are -9°÷45°C. 

L2 

Weights 

Model 238 

TCAEY kg 560 

THAEY kg 580 

TCAEY P1-P2 kg 580 

THAEY P1-P2 kg 600 

TCAEY ASP1- ASP2 kg 625 

THAEY ASP1- ASP2 kg 645 

The weights refer t o pac kaged units without water 

45

0 OFF 

I ON 

TXAEY 117÷130 


TXAEY 117÷130 dimensions and footprints, P1 installation 

o 

p 

a 

c 

6 

2 

3 

1 

8 

11 

12 11 

6 

4 

e 

10 

9 

n 

m 

13 14 

15 16 

17 

5 

i 

l 

i 

7 b 

7 

f 

d g h 

g 


117 mm 1490 1522 500 580 1090 60 20 1448 82 340 150 160 60 100 

124 mm 1490 1522 500 600 1280 60 20 1448 82 340 150 160 60 100 

130 mm 1790 1822 600 695 1510 60 20 1748 82 440 150 160 60 100 


2. Isolat or; 



5. Pump; 

6. Fan; 


8. Coil; 






14. Recover y water outlet; 


16. Recover y water inlet; 

17. Condensation drain. 

Installation 







(KSA). 








L4 


L3 

L1 

Model 117 124 130 

L1 mm 300 300 400 

L2 mm 600 600 600 


L4 mm 300 300 300 

Movement 



components. 



L2 

Weights 

Model 117 124 130 

TXAEY kg 220 280 370 




46

0 OFF 

I ON 

TXAEY 133 


TXAEY 133 dimensions and footprints, Standard, P1 – P2, ASP1 – ASP2 installation 

r s 

6 6 

c 

a 

2 3 

1 

8 

l 

5 

e 

9 

13 14 

11 

16 

10 o 

15 

4 

q 

18 

17 

12 

p n 

19 

7 7 

m l 

b 

f 

d 

g h 

i 

Model a b c d e f g h i l m n o p q 

133 mm 1660 1710 1000 1045 1570 75 273 1210 179 30 942 235 196 175 100 


2. Isolat or; 



5. Pump (P1 – P2, ASP1 – ASP2 installation); 

6. Fan; 


8. Coil; 



11. Water buffer tank (ASP1 – ASP2 i nstallati on); 

12. Wat er buffer t ank drain (ASP1 – ASP2 i nstallati on); 



15. Recover y water inlet; 


17. Recover y water outlet; 


19. Condensation drain; 

Installation 







(KSA). 








L4 


L3 

L1 

Model 133 

L1 mm 800 

L2 mm 1000 

L3 mm 800 

L4 mm 800 

Movement 



components. 



L2 

Weights 

Model 133 

TXAEY Stand ard installation kg 435 

TXAEY P1 installation kg 440 

TXAEY P2 installation kg 450 

TXAE Y ASP 1 installation kg 470 

TXAE Y ASP 2 installation kg 480 




47


Water connections 

Connection to the system 

○ The unit is equipped wit h thr eaded male water connections and a 

manual air bleed val ve positioned inside t he s hell. 

○ It is advisable to install intercept valves t he is olat e the unit fr om the 

rest of the s ystem. It is also advisable t o ins tall elas tic connec tion joins. 



○ The wat er flow t hrough the heat-exchanger should not f all below a 

val ue c orrespondi ng to a t emperat ure differential of 8°C. 

○ During long periods of i nacti vit y, it is advisabl e t o drai n the water 

from the s ystem. 

○ It is possible t o avoid draini ng the water by addi ng ethyl ene glycol to 

the water circuit (see “Use of antifreeze s oluti ons”). 

Pump installation 

○ The units are equipped with a circulating pump, expansion tank and 

safety valve. 

Tank & Pump installation 

○ The units are equipped with an inertial water buf fer t ank, circul ating 

pump, expansion t ank, drai n coc k and safet y val ve. 

Minimum water circuit content TCAEY-THAEY 

In order to keep t he units in good wor king or der, depending on the 

chosen control, mini mum water cont ents i n t he water s yst em must be 

ensured. T he mini mum wat er content is established on t he basis of t he 

unit's nominal cooling capacity (table A Tec hnical D ate), multiplied by 

the c oef ficient expr essed in l/ kW. 

Range Adj ustment type Control 

Specific 

capacity 

TCAEY THAEY 115÷133 AdaptiveFunc tion STANDARD 4 l/kW 

TCAEY THAEY 115÷238 AdaptiveFunc tion Plus 

2 l/kW 

Exampl e: THAEY 124 

The ref erenc e capacit y to be taken i nto consi derati on when calcul ating 

the water c ont ent on the primar y side, is t he c ooling capacit y in design 

conditi ons. If, for example, it coi ncides with the nominal c onditions 

(Qf=23.64 kW), a mini mum vol ume of wat er must be guaranteed, 

calculat ed as f ollows : 

- If the unit envisages STANDARD control with AdaptiveFunction, the 

minimum s ystem c ont ent should be: 

Qf (kW) x 4 l/kW = 23.64 kW x 4 l/kW = 94.6 l 

- If the unit envisages control with AdaptativeFunction 

Plus, the minimum system content should be: 

Qf (kW) x 2 l/kW = 23.64 kW x 2 l/kW = 47.3 l 

For design conditi ons t hat dif fer from t he nominal conditions, t he power 

dat a must be found using Tables "D", whic h provi de a clear list of the 

power val ues that can be obt ained at conditi ons other than nominal 

conditi ons. When doi ng the calcul ation, we r ecommend al ways referring 

to t he maxi mum envisaged power. 

Minimum water circuit content TXAEY 

To ens ure t he good worki ng order of t he EXPSY STEMS multipur pose 

syst ems , the c orrect wat er volumes must be guarant eed in the primary 

and secondary circuits in rel ation to the t ype of s yst em in whic h t he unit 

will be i nstalled. 

4-pipe system s 

The f ollowi ng specific c apacities are consider ed f or this t ype of s ystem. 

Specific 

Range Adj ustment type Control 

capacity 

TXAEY 117÷133 

AdaptiveFunc tion 

4 l/kW 

Primary circuit 

TXAEY 117÷133 

Proportional 

10 l/kW 

Secondary circuit 

Exampl e: T XAEY 124 

The ref erenc e capacit y to be taken i nto consi derati on when calcul ating 

the water c ont ent on the primar y circuit, is the cooling capacit y in design 

conditi ons during AUTOMATIC 1 operati on. 

Supposing t hat the design condition is t he nominal condition (Qf=23.64 

kW), a c ertain volume of water mus t be guarant eed in t he primar y 

circuit, calculat ed as f ollows: 

Qf (kW) x 4 (l/kW) = 23.64 kW x 4 (l/kW) = 94.56 l 

The calc ulation of t he mini mum wat er content in the sec ondar y circuit 

must refer t o t he heating capacit y obtained from the design conditions 

during AUTOMATIC 2 operation. Supposing that the design condition 

coincides wit h t he nominal capacit y (Qt=30. 35 kW), t he mini mum 

capacit y of the sec ondar y circuit s houl d be: 

Qt (kW) x 10 (l/ kW) = 30. 35 kW x 10 (l/ kW) = 300.35 l 

collegamenti idraulici 

For design conditi ons t hat dif fer from t he nominal conditions, t he power 

dat a must be found using Tables "D", whic h provi de a clear list of the 

power val ues that can be obt ained at conditi ons other than nominal 

conditi ons. When doi ng the calcul ation, we r ecommend al ways referring 

to t he maxi mum envisaged power. 

2-pipe system and hot water buffer tank 

In t his t ype of s ystem, the machi ne is c onnect ed to the primary wat er 

circuit with the main exchanger, while the s econdar y exchanger is 

connected to the circuit for heating the hot water, as illustrated in the 

figure on page 24. 

To calculate the mi nimum water c ont ent on the primar y side, ref er to the 

previous c ase relati ve to the 4-pi pe s ys tem. 

To calculate the mi nimum water c ont ent on the s econdar y side 

connected t o t he hot wat er tank, t he following must be taken into 

account. T he hot wat er temperat ure may be i nfluenced, especially in 

the winter, by the mac hine's nat ural defrosti ng cycles . I n fac t, during the 

defrosti ng phase, the mac hine operat es with an i nverted c ycle, 

transferring a c ooling capacit y to the wat er that inevitably cools it down. 

The change i n hot water t emperature may af fect performance if t he 

wat er content in the sec ondar y exchanger wat er circuit is insufficient . 

The figure provides a general illustration of the secondar y circuit, which 

highlights the circuit's us er side boiler SS and t he i nertial water buff er 

tank SI. 

US 

MA VSA 

SS 

RS 

VE 

MA VSA 

PU 

Key: 

ECH REC: recover y exchanger 

PDR: recover y differential pressure switch 

PU: secondary circuit us er pump 

VE: expansion vess el 

VSAC: water safety valve 

VSA: automatic bleed val ve 

MA: pressure gauge 

SI: sec ondar y circuit inertial t ank 

SS: hot water tank 

RS: hot wat er restor ation 

US: hot wat er us er 

SI 

VSAC 

PDR 

ECH 

REC 

Having assigned the permitt ed c hange in t emper ature, it is possible to 

calculat e the minimum specific capacit y. 

The f ollowi ng tabl e gives t he mini mum specific capacit y values in l/ kW 

for the sec ondar y circuit, on the basis of the hot water t emperature 

change. It is ther efore possible t o c alculat e t he c apacit y of the t ank SI, 

once the inst alled power is known. 

Hot water temperature change dtu K 4 5 6 7 8 

Specific capacity l/kW 22 18 15 13 12 

Application example 

A s ystem with a maxi mum ins talled recovering heating capacit y of 

Qt installed= 30 kW. A maxi mum per mitted hot water change of dt u =5K. 

The sec ondar y circuit c apacit y is calc ulated as follows: 

Qt installed (kW) x 18 l/ kW = 30 kW x 18 l/ kW = 540 l 

The sec ondar y circuit water cont ent must be at least 540 l. O verlooking 

the water c ont ent in t he pipes, t he c ase i n questi on requires a t ank SI 

(see figure) wit h a capacit y of at least 540 l. I n pr actice, we recommend 

never exceeding dtu=6K and always considering the maximum 

foreseeable power. 

48


water connections 

Maximum water circuit content 

All units are equi pped with an expansion tank that li mits the maxi mum 

amount of wat er contained in t he s ys tem. I f the water contents exceed 

the values indicated in the table, an additional expansion tank will be 

required. 

Model 

Blend with ethylene glycol 

0 % 10 % 20 % 30 % 

115 l 190 170 160 140 

117 l 190 170 160 140 

122 l 190 170 160 140 

124 l 190 170 160 140 

127 l 190 170 160 140 

130 l 190 170 160 140 

133 l 370 340 340 290 

233 l 370 340 340 290 

238 l 370 340 340 290 

Water data 

Model 115 117 122 124 127 130 133 233 238 

Safet y val ve barg 3 3 3 3 3 3 3 3 3 

Exc hanger water c ont ents l 1,33 1,33 1,90 2,20 2,40 2,60 3,20 3,20 3,20 

Tank wat er content ASP1 l 35 35 45 45 45 45 80 80 80 

Tank water content ASP2 l - - - - - - 80 80 80 

Expansion tank technical data 

Model 115 117 122 124 127 130 133 233 238 

Capacit y l 7 7 7 7 7 7 14 14 14 

Pre-charging barg 1 1 1 1 1 1 1 1 1 

Maxi mum expansion tank press ure barg 3 3 3 3 3 3 3 3 3 

Use of anti-freeze solutions 

○ The us e of ethylene gl ycol is rec ommended 

if you do not wish t o drai n t he water from the 

hydraulic s yst em during the wi nter st oppage, or 

if the unit has to suppl y c hilled wat er at 

temperatures l ower than 5°C The additi on of 

glycol changes t he physic al properties of the 

wat er and c ons equentl y the perfor mance of t he 

unit. T he proper percent age of glyc ol to be 

added to the s ystem c an be obtained from the 

most demandi ng operating conditi ons fr om 

thos e shown below. 

○ Table "H" shows the multipliers which allow 

the changes in performance of the units to be 

det ermined in proportion t o t he required 

percentage of ethylene glycol. 

• The multipliers refer to the following 

conditi ons: c ondenser inl et wat er temperat ure 

30°C; c hilled water outlet temperat ure 7°C; 

temperature differ ential at evaporator and 

condens er 5°C. 

• For different operating conditi ons, the same 

coefficients c an be used as their variations ar e 

negligible. 

Table “H” 

% glycol in weight 10 % 15 % 20 % 25 % 30 % 

Freezing temp erature °C -5 -7 -10 -13 -16 

fc QF 0,991 0,987 0,982 0,978 0,974 

fc P 0,996 0,995 0,993 0,991 0,989 

fc Δpw 1,053 1,105 1,184 1,237 1,316 

fc G 1,008 1,028 1,051 1,074 1,100 

fc QF = Cooling capacit y c orrection f actor. 

fc P= Correction factor for the absorbed 

electrical current. 

fc Δpw = Correction fact or of the pr essure 

drops in the evaporat or 

fc G = Correction fac tor of t he glyc ol wat er flow 

to t he evaporat or 

49


water circuit 

Water circuits in TCAEY-THAEY models with STANDARD electronic control 

W ater circuit in models 115÷133, Pump in stall ation 

AP1 

ECH 

ST2 

VSM 

M 

VS 

RI 

OUT 

CF 

RE 

VE 

PD 

PU 

RI 

FA 

RI 

IN 

ST1 

W ater circuit in models 115÷133, Tank & Pump in stallation 

AP1 

ECH 

ST2 

VSA 

RAA 

VSM 

PU 

RI 

OUT 

CF 

RE 

ST1 

VSM 

PD 

VSM 

VS 

SA 

RI 

FA 

S 

RI 

IN 

M 

VE 

W ater circuit in model 133, Standard installation 

AP1 

ECH 

ST2 

VSM 

RI 

OUT 

CF 

RE 

PD 

VSM 

M 

RI 

FA 

RI 

IN 

ST1 

CF Refrigerant circuit VE Expansion tank 

ECH Plate evaporator RAA Wat er buffer t ank electric heater (acc essor y) 

RE Evaporator antifr eeze elec tric heater FA Mesh filter (inst alled by t he i nstaller) 

PD Wat er diff erenti al press ure s witch SA Water buffer tank 

VSM Manual bleed valve M Pressure gauge 

VS Safety valve PU Pump 

AP 1 Electronic c ontr ol S Wat er drain 

ST1 Primar y inlet temperat ure gauge (wor king) RI Intercept c oc k 

ST2 Primar y outlet temperat ure gauge ( antifreeze) - - - - Connections to be made by the inst aller 

50


water circuit 

Water circuits in TCAEY-THAEY models with electronic control 


AP1 

ECH 

ST2 

VSM 

M 

VS 

RI 

OUT 

CF 

RE 

VE 

PD 

PU 

RI 

FA 

RI 

IN 

ST1 


AP1 

ECH 

ST2 

VSM 

VSA 

RAA 

VSM 

ST4 

PU 

RI 

OUT 

CF 

RE 

ST1 

VSM 

M 

PD 

VSM 

VS 

VE 

SA 

RI 

FA 

S 

RI 

IN 

W ater circuit in models 133-238, Stand ard in stall ation 

AP1 

ECH 

ST2 

VSM 

RI 

OUT 

CF 

RE 

PD 

VSM 

M 

RI 

FA 

RI 

IN 

ST1 

CF Refrigerant circuit VE Expansion vessel 

ECH Plate evaporator RAA Wat er buffer t ank electric heater (acc essor y) 

RE Evaporator antifr eeze elec tric heater FA Mesh filter (inst alled by t he i nstaller) 


VSM Manual bleed valve M Pressure gauge 

VSA Automatic bleed val ve PU Pump 

VS Safety valve S Wat er drain 

AP 1 Electronic c ontr ol RI Intercept c oc k 

ST1 Primar y inlet temperat ure gauge - - - - Connections to be made by the inst aller 

ST2 Primar y outlet temperat ure gauge 

- wor king and antifreeze for Standard and Pump installations 

- antifreeze f or Tank & Pump i nstallations 

ST4 Wat er buffer t ank outlet temperatur e gauge ( wor king) 

51

TXAEY 117÷133 

water circuit 

Water circuits in TXAEY models 


AP1 

ECH 

ST2 

VSM 

M 

VS 

RI 

OUT 

CF 

RE 

VE 

PD 

PU 

RI 

FA 

RI 

IN 

ECHR 

ST1 

ST5 

RI 

OUT 

CF 

RR 

PD 

ST4 

RI 

FA 

RI 

PU 

IN 


AP1 

ECH 

ST2 

VSM 

RAA 

VSM 

PU 

RI 

OUT 

CF 

RE 

ECHR 

ST1 

ST5 

VSM 

M 

PD 

VSM 

VS 

VE 

SA 

RI 

FA 

S 

RI 

RI 

IN 

OUT 

CF 

RR 

PD 

ST4 

RI 

FA 

RI 

PU 

IN 

W ater circuit in model 133, Standard installation 

AP1 

ECH 

ST2 

VSM 

RI 

OUT 

CF 

RE 

PD 

VSM 

M 

RI 

FA 

RI 

IN 

ECHR 

ST1 

ST5 

RI 

OUT 

CF 

RR 

PD 

ST4 

RI 

FA 

RI 

PU 

IN 

CF Refrigerant circuit VE Expansion vessel 

ECH Plate evaporator VSM Manual bleed valve 

ECHR Plate r ecover y unit VS Safety valve 

RE Evaporator antifr eeze elec tric heater RAA Wat er buffer t ank electric heater (acc essor y) 

RR Recover y unit antifreeze electric heater FA Mesh filter (inst alled by t he i nstaller) 


AP 1 Electronic c ontr ol M Pressure gauge 

ST1 Primar y inlet temperat ure pr obe (working) PU Pump 

ST2 Primar y outlet temperat ure probe (antifr eeze) S Wat er drain 

ST4 Recover y unit inl et t emperature probe RI Intercept c oc k 

ST5 Recover y unit outlet t emperat ure probe - - - - Connections to be made by the inst aller 

52


electrical connections 

TCAEY-THAEY electric connections with STANDARD control 


Electrical po wer supply 400V – 3ph + N – 50Hz 

MIQE = Electrical panel int ernal termi nal board; 

MEU = User external ter minal board; 

IG = Main isolating switch; 

LBG = General lockout light 

( power s uppl y 24 Vac); 

KIS = RS485 s erial interface; 

KCH = RS232 hardware key; 

KTR1 = Remote keypad (accessor y); 

L = Line; 

N = Neutral; 

PC = Personal comput er; 

PE = Earth terminal; 

SCR = Remote control selector 

(c ontrol with clean c ontact); 

SEI – Summer/wint er selec tor 

(control with clean contac t); 

- - -= Connections pr ovided by the inst aller 

PE IG 

3.L1 L 

3.N N 

KIS 

+ 

- 

RS485 

6.06 

6.05 

MIQE 

L1 

L2 

L3 

N 

400V-3ph+N-50Hz 

MEU 

+ 

- 

RS485 

KCH 

RS232 

LBG 

PC 

6.04 

GND 

SCR 

6.02 

GND 

SEI 

3.02 

3.03 

3.04 

25 

24 

26 

KTR1 

○ The el ectrical panel can be acc essed 

through the front panel of the unit. 

○ Connections must be made by skilled 

personnel i n compliance wit h current st andards 

and wit h t he diagrams provided wit h t he 

mac hine. 

○ Always install a general isolator in a 

protect ed area near t he applianc e with a 

delayed c haract eristic cur ve of a suit abl e 

capacit y and breaking c apacit y. Make sure the 

general isolator includes a 3mm mini mum 

opening dist ance bet ween c ont acts. 

○ Earth c onnecti on is c ompuls ory by law and 

safeguar ds the user while the machi ne is in 

use. 

Cable section 115 117 122 124 127 130 

Line s ection mm² 4 4 6 6 10 10 

PE sec tion mm² 4 4 6 6 10 10 

Remote c ontrol s ection mm² 1,5 1,5 1,5 1,5 1,5 1,5 

ATTENTION ! 

The di agrams onl y show t he c onnecti ons t o be made by t he i nstaller. 

53

TCAEY-THAEY 133 


TCAEY-THAEY 133 






( power s uppl y 24 V AC); 

LFC = Compress or operating 

light (230 Vac); 

CP = Pump c ontr ol for Standard 

inst allation (consens us at voltage of 230 

Vac maxi mum charge 2A AC1) 

KIS = RS485 s erial interface; 

KCH = RS232 hardware key; 

KTR1 = Remote keypad (accessor y); 

L = Line; 

N = Neutral; 








PE IG 

3.L1 L 

3.N N 

KIS 

+ 

- 

RS485 

7.06 

7.05 

7.04 

GND 

7.02 

GND 

MIQE 

L1 

L2 

L3 

N 

400V-3ph+N-50Hz 

MEU 

+ 

- 

RS485 

KCH 

RS232 

LBG 

SCR 

SEI 

PC 

3.02 

3.03 

3.04 

25 

24 

26 

KTR1 

7.07 

3 N 

LFC 

8.01 

3 N 

CP 






mac hine. 









use. 

Cable section 133 

Line s ection mm² 10 

PE sec tion mm² 10 

Remote c ontrol s ection mm² 1,5 

ATTENTION ! 


54

GND 

GND 

! 

ALARM 

Prg 

ON 

OFF 

MODE 



TCAEY-THAEY electric connections with compatible 

control 








J13 = 6-way t elephone c onnect or (RJ12); 

J15 = Connector for insertion of 

access ory KSC; 


accessories KRS485, KFTT10, KISI; 

KSC = Clock card (accessor y); 

KRS485 = Serial int erfac e RS485 

(access ory); 

KRS232 = C onverter RS485/R S232 

(access ory); 

KUSB = converter RS485/USB (access ory); 

KTR = Remote keyboard (accessor y); 

L = Line; 

N = Neutral; 








= 6- wire t elephone c able 

(maximum distance 50 m., for 

distanc es which are greater than this 

pl ease contact cust omer ser vice at 

RHOSS S.p.A.); 

PE IG 

+ 

- 

KSC 

J15 

CLOCK CARD 

KRS485 

J16 

SERIAL 

CARD 

J10 ID7 ID8 

J13 

INTERFACE 

PLAN 

C10 NO10 NC10 

MIQE 

L1 

L2 

L3 

N 

400V-3ph-50Hz 

MEU 

+ 

- 

KTR 

KRS232 

/ KUSB 

SCR 

SEI 

LBG 

PC 






mac hine. 









use. 

Cable section 115 117 122 124 127 130 

Line s ection mm² 4 4 6 6 10 10 

PE sec tion mm² 4 4 6 6 10 10 

Remote c ontrol s ection mm² 1,5 1,5 1,5 1,5 1,5 1,5 

ATTENTION ! 


N.B.: 

Specific t erminals are provided for t he CS and 

DSP acc essories. 

55

GND 

GND 

! 

ALARM 

Prg 

ON 

OFF 

MODE 



TCAEY-THAEY 133 – 238 





LBG = General loc kout light (power suppl y 230 

Vac); 

LFC1 = Compressor operating 

light 1 ( 230 Vac); 

LFC2 = Compressor operating 

light 2 ( 230 Vac) ( model 233); 

CP = Pump c ontr ol for Standard 

inst allation (consens us at voltage of 230 

Vac maxi mum charge 2A AC1) 








(access ory); 


(access ory); 



L = Line; 

N = Neutral; 








= 6- wire t elephone c able 



pleas e contac t cus tomer s ervice at 

RHOSS S.p.A.); 

PE IG 

+ 

- 

KSC 

J15 

CLOCK CARD 

KRS485 

J16 

SERIAL 

CARD 

ID7 ID8 

J6 

J13 

INTERFACE 

PLAN 

7.05 

N 

7.06 

N 

MIQE 

L1 

L2 

L3 

N 

400V-3ph+N-50Hz 

MEU 

+ 

- 

KTR 

KRS232 

/ KUSB 

SCR 

SEI 

CP 

LBG 

LFC1 

PC 

7.07 

N 

LFC2 






mac hine. 









use. 

Cable section 133 233 238 

Line s ection mm² 10 10 10 

PE sec tion mm² 10 10 10 

Remote c ontrol s ection mm² 1,5 1,5 1,5 

ATTENTION ! 


N.B.: 

Specific t erminals are provided for t he CS and 

DSP acc essories. 

56

GND 

GND 

! 

ALARM 

Prg 

ON 

OFF 

MODE 

TXAEY 117÷133 


Electric connections in TXAEY models 

TXAEY 117÷133 






LFC = Compress or operating 

light (230 Vac); 

CP = Pump c ontr ol for model 133 

(Standard i nstallati on) 

(consens us at volt age of 230 Vac 

maxi mum charge 2A AC1); 

CPR = Recover y pump c ontrol 

(c onsensus at voltage of 230 Vac 

maximum c harge 2A AC 1); 








(access ory); 


(access ory); 



L1 = Line 1; 

L2 = Line 2; 

L3 = Line 3; 

N = Neutral; 





SEI = Selector AUTOMATIC / SELECT 

(control with cl ean contact); 

CR = Recovery consens us 

(control with cl ean contact); 

- - -= Connecti ons provided by t he ins taller 

= 6-wire telephone c abl e 



pl ease contact cust omer ser vice at 

RHOSS S.p.A. 

PE 

+ 

- 

KSC 

J19 

CLOCK CARD 

KRS485 

7.05 

N 

7.06 

N 

7.06 

7.07 

7.08 

7.09 

Mod. 133 

J20 

SERIAL 

CARD 

ID7 ID8 

J8 

J16 

INTERFACE 

PLAN 

7.05 

N 

7.06 

N 

7.07 

7.08 

7.09 

7.10 

Mod. 117130 

MIQE 

L1 

L2 

L3 

N 

400V-3ph+N-50Hz 

MEU 

+ 

- 

KTR 

KRS232 

/ KUSB 

SCR 

SEI 

CP 

LBG 

LFC 

CR 

CPR 

PC 






mac hine. 









use. 

Cable section 117 124 130 133 

Line s ection mm² 4 6 10 10 

PE sec tion mm² 4 6 10 10 

Remote c ontrol s ection mm² 1,5 1,5 1,5 1,5 

ATTENTION ! 


57

notes 

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58


TXAEY 117 ÷133 

Compact-Y range 

RHOSS S.P.A. 

Via Oltre Ferrovia, 32 - 33033 Codroipo (UD) - Italy 

tel. +39 0432 911611 - fax +39 0432 911600 

rhoss@rhoss.it - www.rhoss.it - www.rhoss.com 

IR GROUP S.A.S. 

7 rue du Pont à Lunettes - 69390 Vourles - France 

tél. +33 (0)4 72318631 - fax +33 (0)4 72318630 

exportsales@rhoss.it 

RHOSS Deutschland GmbH 

Hölzlestraße 23, D-72336 Balingen, OT Engstlatt - Germany 

tel. +49 (0)7433 260270 - fax +49 (0)7433 2602720 

info@rhoss.de - www.rhoss.de 

RHOSS MERCOSUR 

Benjamin Constant 576 - 1er Piso C.P. 1214 - Asuncion Paraguay 

tel/fax +595 21 493 897 - www.rhossmercosur.com 

Sedi commerciali Italia: / Italy branch offices: 

Area Nord-Est: 33033 Codroipo (UD) - Via Oltre Ferrovia, 32 

tel. +39 0432 911611 - fax +39 0432 911600 

Area Nord-Ovest: 20041 Agrate Brianza (MI) 

Centro Colleoni - Palazzo Taurus, 1 

tel. +39 039 6898394 - fax +39 039 6898395 

Area Centro-Sud: 00199 Roma - Viale Somalia, 109 

tel. +39 06 8600699-707 - fax +39 06 8600747 

Area Sud: 80143 Napoli - Via G. Porzio - Centro Direzionale - Isola G8 

tel. +39 081 7879121 - fax +39 081 7879135 

La empresa RHOSS S.P.A. no se asume ninguna 

responsabilidad por eventuales errores en el presente 

manual y se reserva el derecho de modificar las 

características de sus productos sin previo aviso. 

K20100ES ed.5 

10.08 - 0.000 - Stampa:

TCAEY-THAEY 115Ã·238 - Rhoss

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