06 rhoss tcaiy-thaiy 124 y-mich en nt

8/18/2019 06 Rhoss Tcaiy-thaiy 124 Y-mich en Nt

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K20111EN ed. 2

TC A IY -T H A IY 1 2 4

Y-Mich rangeMicrosystem

23,8 kW27,3 kW

P ac kag ed air-coo led reversible w ater chillers and heat pumps with

axial fans.

Rang e with hermetic S croll Inverter compress ors.



Contents

3

Contents General characteristics............................................................................................................................4

Intended conditions of use .........................................................................................................................4 Construction features ..............................................................................................................................5 Accessories ................................................................................................................................................5

Factory fitted accessories ..........................................................................................................................5

Accessories supplied loose........................................................................................................................5 Technic al dat a............................................................................................................................................6

Energy efficienc y at partial loads - ESEER index ..................................................................................8 Electronic controls ....................................................................................................................................9

Electronic control .........................................................................................................................................9

KTR – Remote keyboard ............................................................................................................................9 Serial conn ection ....................................................................................................................................10 Serial connection for control ....................................................................................................................10 Supervision.................................................................................................................................................10

KSC – Clock card ......................................................................................................................................10

Performance dat a....................................................................................................................................11 Pressure drops and residual static pressure ..................................................................................13

Pressure drops...........................................................................................................................................13

Residual s tatic pressure ...........................................................................................................................13 Operating limits .......................................................................................................................................14

Power levels and sound pressure ......................................................................................................14 Dimensions and footprints...................................................................................................................15

W ater connections..................................................................................................................................16 Connection to the system.........................................................................................................................16 Pump ins tallation .......................................................................................................................................16

Tank & Pump inst allation..........................................................................................................................16 Maximum water circuit content ................................................................................................................16 Water data ..................................................................................................................................................16 Expansion vessel technical data .............................................................................................................16

Use of anti-f reeze solut ions..................................................................................................................16

W ater circuits ...........................................................................................................................................17

Electrical connections ...........................................................................................................................18



TCAIY-THAIY 124 general characteristics

4

General character ist ics

Intend ed conditions o f use

The TCAIY P1 and TCAIY ASP1 units are

packaged air-cooled water c hillers with axialfans and with pump or with pump and waterbuffer tank.The THAIY P1 and THAIY ASP1 units are

reversible packaged air-cool ed water chillerswith axial fans and with pump or pump andwater buffer tank.

They are intended for use i n conditioning plants

or industrial processes where a suppl y of chilledwater (TCAIY) or c hilled and hot water (THAIY),is required. Not suitable for drinking water.

The units are designed for outdoor

installation.

The units c omply wit h the following Directi ves:

○ Machinery Directive 2006/42/CE (MD);○ Low Voltage Directive 2006/95/CE (LVD);○ Electromagnetic Compatibility Directive2004/108/CE (EMC);○ Pressure Equipment Directive 97/23/CEE

(PED).

Guide to reading the code

"SERIES" code "MODEL" code

T C A I Y 1 24

Cooling only

HWater

produc tion unit

Heat pump

Air-cooled

Hermetic

Scrollcompressoractivated by

inverter

R410Arefrigerant fluid

No. compressors Approximate

cooling capacity

(in kW)

Pump

P1 – Installation with pump.

Tank & Pump ASP1 – Installation with pump and water buffer t ank.

Example: TCAIY 124 ASP1

○ Cold water onl y unit;

○ Air cooled;○ 1 x hermetic Scroll compressor activated by inverter;○ R410A refrigerant fluid;○ Nominal cooling capacity of approxi mately 24 kW.○ With pump and water buffer tank.



TCAIY-THAIY 12 4 construction features

5

Construct ion features

○ Load-bearing structure and panels ingalvanised and painted (RAL 9018) sheet s teel;base in galvanised sheet steel; so undproofedcompressor compart ment. Scroll-type rotaryhermetic compr essor with inverter activation for

variable capacit y control from 29% to 100% ofthe nominal power with reducti on of the s tartingcurrent during the start-up phase (there are nocurrent peaks at start-up and the starting

current never exceeds the maximum current)and re-phasing of automatic use to the mains,complete with in ternal thermal protection andcrankcase heating element ac tivatedautomaticall y when the unit stops (as l ong asthe unit is connected to the po wer supply).

○ Water side, braz e welded plate heatexchanger in stainless steel, compl ete wit hantifreeze electric heater and suitably insulated.○ Air side heat exchanger comprised of a coilof copper pipes and aluminium fi ns.

○ Double axial motor-driven fan with externalrotor, equipped with inter nal t hermal pro tection,with modulating speed control on the basis ofthe condensation pressure and the thermal l oadin the unit (up to an external air temperature of -

10°C when operating as a water chiller and upto an external air temperature of 40°C whenoperating as a heat pump) and complete withan external protection gril le.○ Male threaded water connections.

○ Water circuit in annealed copper pi ping (EN12735-1-2) complete with: ci rculating pump,pressure gauge, expansion vessel, bleed a nddrain valves, and safety valve. The version wit hthe water buffer tank on the delivery pipe also

has a manual/automatic air bleed valve.○ Differential pressur e switch that protects theunit from any interruptions to the water flow.○ Refrigerant circuit in annealed copper piping(EN 12735-1-2) complete with: drier filter,

charge connec tions , liq uid/humi dity indic ators,

safety pressure switch on the high pressureside, pressure switch on the low pressure side,transducers on the deli very pipe and aspirationpipe to monitor the r espec tive pressures

(continuous fan speed control and pressuriseddefrost management), temperature probe onthe compressor drain to monitor itstemperature, safety valves on the high pressureside, electronic thermostatic expansion valve,

cycle inversion valve (for THAIY), liquid receiver(for THAIY) and check valves (1 for TCAIY and5 for THAIY), aspiration pipe gas separator anddelivery pipe oil separator.○ Unit wit h IP24 level of protec tion.

○ The unit is complete with the R410Arefrigerant charge.

○ Ductable condensation drain (for THAIY).

Poten tial in stal l ation s

Pump P1 – Installation with pump, pressuregauge, expansion vessel, manual bl eed val ve,drain valve and safety valve.Tank & Pump ASP1 – Installation with pump,

water buffer tank, pr essure gauge, expansionvessel, manual and automatic bleed valve,drain valves, preparation for water buf fer tankantifreeze electric h eater and safety valve.The inertial water buffer tank is installed on the

water circuit delivery pipe.

Elect r ical bo ard

○ The electrical board can be acc essed byopening the front panel, in keeping with currentIEC norms, and can be opened and closed with

a suitable tool.○ Compl ete with:• electrical wiring arranged for power suppl y

400-3ph+N-50Hz;• auxiliary power supply 230V-1ph-50Hzdrawn from the main power s upply;• general isolator, complete with door

interloc king isolator;• automatic compressor pro tection switch;• protection fuse for auxiliar y circuit;

• compressor power contactor;

• remote unit control.

○ Programmable electronic board withmicroprocessor, c ontrolled by the keyboardinserted in the machine.○ This electronic board performs the following

functi ons:• Regulation and manage ment of the outl etwater temperature set points; of c ycle reversal

(THAIY); of the safety timer delays; of thecirculating pump; of the compressor and systempump hour-run meter; of the electronic anti-freeze protection which cuts i n automaticall ywhen the machine is s witched off; and of the

functi ons which control the operation of theindivi dual parts making up the machine;• complete protection of the unit, automatic

emergency shutdown and dis play of the alarmswhich have been acti vated;• compressor protection phase sequence

monitor;• unit protection against low or high phase

power suppl y voltage;• visual indication of the pr ogrammed set

points on the dis play; of the inlet /outlet watertempera ture on the displ ay; of the alarms on thedisplay; and of the cooling/heat-pump operatingmode on the displ ay (for THAIY models);

• self-diagnosis with continuous monit oring ofthe functioning of the unit ;

• user interface menu;• alarm code and description;

• alarm histor y management (menu protected

by manufac turer pass word).○ The followi ng is memorised for each alarm:• date and time of intervention (if the KSC

accessory is present);• alarm code and description;

• inlet/outlet water temperatures when the

alarm inter vened;• alarm delay time from the switch-on of the

connected device;• compressor status at moment of alarm;○ Advanced functions:

• configured for serial connec tion (KR S485,KFTT10, KRS232 and KUSB accessor y);

• possibili ty to have a digital input for remotemanagement of the double set point (contactRHOSS S.p.A. pre-sales ).

• possibili ty to have an analogue input for the

scrolling set-point via a 4-20mA remote signal(contactRHOSS S .p.A. pre-sales );

• configured for management of ti me bands

and operation parameters with the possibility ofdaily/weekly operating programs (KSCaccessory);• check-up and monitoring of scheduled

maintenance st atus;• testing of the units assisted by computer;

• self-diagnosis with continuous monitoring of

the functioning of the unit.

Accessor ies

Facto ry f i t ted accesso r ies

RAA – Water buffer tank antifreeze electricheater (90 W), available for installation ASP1.RPB – Coil pro tection networ ks.DSP – D ouble set-point by means of digital

consensus (incompatible with the CSaccessory).CS – Scrolling set-point by means of the 4- 20mA analogue signal (incompatible with the DSPaccessory). Needs to be handl ed as a speci al

accessory by our pre-sales of fice.

A ccesso r ies su ppl ied loo se

KSA – Anti-vibration supports.

KRPB – Coil protection networks.KTR - Remote keypad for control at a distancewith r ear illumi nated LCD display (samefuncti ons as the one built into the machine).KSC - Clock card to dis play date/time and to

regulate the machine with dail y/weeklystart/stop time bands, wit h the possi bility tochange the set-points .KVDEV – 3-way diverter valve for managing theproduc tion of domestic hot water.

KRS485 – RS485 serial interface card to createdialogue networks between cards (maximum of

200 units at a maximum distance of 1,000 m)and the building automation, externalsupervision s ystems or RHOSS S.p.A.supervision systems (protocols

supported: pr oprietary protocol;Modbus® RTU).

KFTT10 – FTT10 serial interface card forconnection to super vision s ystems (LonWorks

®

system compliant with Lonmark® 8090-10

protocol with chill er profile).KISI – CAN bus serial interface (Controller

Area Network compatible with evol ved hydronicsystem for integrated comfortmanagement (protocol supported C anOpen

®).

KRS232 – RS485/RS232 serial converter forinterconnection between RS485 serial networ kand super vision systems with serial connection

to PC via RS232 serial port (RS232 cableprovided).

KUSB – RS485/USB serial converter forinterconnection between RS485 serial networ kand super vision systems with serial connectionto PC via USB port (USB cable provided).KMDM – GSM 900-1800 modem kit to be

connected to the unit or the management of theparameters and any alarm signals on a remotebasis. The kit consists of a GSM modem withrelative RS232 card. It is necessar y to purchasea SIM data card, not supplied byRHOSS S.p.A.

KRS –RHOSS S.p.A. supervisio n software forthe monitoring and r emote management of theunits. The kit consists of a CD-Rom and

hardware key.



TCAIY 124 technical data

6

Tech nical data

Table “A”: Technical data

TCAIY mod el 124 P1 ASP1

Nominal cooling capacity (*) kW 23,8

E.E.R. 2,53

E.S.E.E.R. 3,96

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

Sound power l evel (****) dB(A) 75

Scroll compressor controlled by inverter No. 1

Fans No. x kW 2 x 0.24

Exchanger water contents l 2,09

Water side exchanger nominal water flow (*) l/h 4094Nominal pressure drops, water side exchanger (*) kPa 35,45

Residual s tatic pressure (P1 installation) (*) kPa 129

Residual s tatic pressure (ASP1 installation) (*) kPa 91

Tank water content (ASP1 installation) l 45

R410A refrigerant charge See serial No. platePol yester oil charge See compressor plate

Electrical data

Absorbed power (*) (●) kW 9,42

Pump absor bed power kW 0,57

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

Auxiliary power suppl y V-ph-Hz 230-1-50

Nominal current (■) A 22,8Maxi mum current (■) A 30,2

Start-up current (■) A 30,2Pump absor bed current A 2,8

Dimensions

Width (W) installation P1 and ASP1 mm 1522

Height (H) mm 1280

Depth (P) mm 600Water connec tions Ø 1 ½” GM

(*) In the followi ng conditions : with compressorat max r. p.m., condenser air inlet temperature35°C; chilled output water temperatur e 7°C;tempera ture differ ential at evaporator 5°C.

(***) Sound pressure level in dB(A), measuredat a distance of 5 m from the unit, with adirectionality fac tor o f 2.

(****) Sound power level in dB(A) on the basis

of measure ments made in compliance with theUNI EN-ISO 3744 standard and Eurovent 8/1.

(■) Total current value, including t he currentabsorbed b y the pump.

(●) Power absorbed by the unit without motor-driven pump.

N.B.:The values for available static pressure of thepumps and the pressure drops of theexchangers can be found on page 13.

The calculation of the E.E.R. and C.O.P. doesnot take the pump absorption into account.

LP

H



THAIY 124 technical data

7

Table “A”: Technical data

THAIY mod el 124 P1 ASP1

Nominal cooling capacity (*) kW 23,8

E.E.R. 2,53

E.S.E.E.R. 3,96

Nominal heating capacity (**) kW 27,3

C.O.P. 2,95

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

Sound power l evel (****) dB(A) 75

Scroll compressor controlled by inverter No. 1

Fans No. x kW 2 x 0.24Exchanger water contents l 2,09

Water side exchanger nominal water fl ow (*) l/h 4094

Nominal pressure drops, water side exchanger (*) kPa 35,45

Residual s tatic pressure (P1 installati on) (*) kPa 129

Residual s tatic pressure (ASP1 installation) (*) kPa 91

Tank water content (ASP1 installation) l 45

R410A refrigerant charge See serial No. plate

Pol yester oil charge See compressor plate

Electrical data

Absorbed power in summer oper ation (*) (●) kW 9,42

Absorbed power in winter operation (**) (●) kW 9,28

Pump absor bed power kW 0,57

Electrical power supply V-ph-Hz 400-3+N-50

Auxiliary power suppl y V-ph-Hz 230-1-50

Nominal current in summer operation (*) (■) A 22,8Nominal current in winter operation (**) (■) A 21,1

Maxi mum curre nt (■) A 30,2

Start-up current (■) A 30,2Pump absor bed current A 2,8

Dimensions

Width (L) (ASP1 installation) mm 1522

Height (H) mm 1280Depth (P) mm 600

Water connec tions Ø 1 ½” GM

(*) In the followi ng conditions : with compressor

at max r. p.m., condenser air inlet temperature35°C; chilled output water temperatur e 7°C;tempera ture differ ential at evaporator 5°C.

(**) In the followi ng conditions : with compressor

at max r.p.m., evaporator inlet air temperature7°C D.B., 6°C W.B.; temperature of hot waterproduced 45°C; at the same flow rate as insummer oper ation.

(***) Sound pressure level in dB(A), measuredat a distance of 5 m from the unit, with a

directionality fac tor o f 2.

(****) Sound power l evel in dB(A) on the basis

of measurements made in compliance with theUNI EN-ISO 3744 standard and Eurovent 8/1.

(■) Total current value, including t he currentabsorbed b y the pump.

(●) Power absorbed by the unit without motor-driven pump.

N.B.:

The values for available static pressure of thepumps and the pressure drops of the

exchangers can be found on page 13.The calculation of the E.E.R. and C.O.P. doesnot take the pump absorption into account. L

P

H



TCAIY-THAIY 124 technical data

8

Energ y efficien cy at p artial lo ads - ESEER index

○ The E.E.R. i ndex represents a n estimate of the energy efficienc y ofthe cooling unit in nominal design conditions. In realit y, the opera tingtime of a chiller in nominal conditions is usually less than the operatingtime in partial load conditions.○ The E.S.E.E.R. (European Seasonal E.E.R.) is an index that

estimates the average seasonal energy efficiency of the cooling unit i nfour load and water temperature conditi ons. Generall y, two waterchillers with the same E.E.R. may have dif ferent E.S.E.E.R. values. Infact, for an air-cooled chiller, the average energy efficiency depends on

design choices and on the inlet air temper ature at the condensing heatexchanger.○ The E.S.E.E.R. energy index, introduced by the Europeancommunit y (Project E.E.C.C.A.C. - Energy Efficiency and Certificationof Central Air Co nditioners), is characterised by the water temperatures(see table “B”) and by the energy weights that are assigned to the four

load conditions considered in the calculation: 100%, 75%, 50% and25%.

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

100

where EER100% EER75% EER50% EER25% represent the

efficiencies of the cooling unit in the four load conditions and at thetemperatures indicated in table “B”.The data is calculated using Eurovent methodology. The pump

absorption ( if present) is not taken into consideration.

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 energy efficiency values at partial loads have been obtainedthanks to the opti misation of t he heat exchangers and b y the variable

capacity compressor.

Table “C”: E.E.R. - E.S.E.E.R. for TCAIY THAIY

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

124 2.53 3,96



TCAIY-THAIY 124 electronic controls

9

Elec t ron ic cont ro ls

Electroni c cont ro l

The keyboard with display makes it possible to view the wor kingtemperature and all t he unit process variables, as well as providingaccess to setting parameters for operating set points and theirmodification. For purposes of technical assistance, it allo ws password-

protected access to the unit's management par ameters (access forauthorised pers onnel only).

ALARM

!

Prg MODE

ON

OFF

DISPLAY: displays the numbers and the values of all theparameters (i.e. outl et water temperature etc.), any

alarm codes and res ource status by means ofstrings.

ALA RM

!

ALARM key: makes it possible to display the code and reset anyalarms.

Prg

PRG key: makes it possible to programme the machine'soperating parameters.

ON

OFF

ON/OFF key: makes it possible to switch the unit on and off.

UP key:used to scr oll through the list of parameters, statuses

and alar ms; makes it possible to modif y set points.

MODE - ENTER key: makes it possible to switch from chiller to heat pump

operation and vice versa.

MODE

DOWN key:

used to scr oll through the list of parameters, statusesand alar ms; makes it possible to modif y set points.

KTR – Remo te keybo ard

The remote keyboard with displ ay (KTR) allows the remote control anddisplay of all t he unit's digital and anal ogue process variables. Ittherefore possible to control all the machine functions directly in theroom. It allows setting and management of ti me periods (i f KSC

accessory is included).

ALARM

!

Prg MODE

ON

OFF

DISPLAY: displays the numbers and the values of all theparameters (i.e. outl et water temperature etc.),

any alarm codes and r esource status by means ofstrings.

ALA RM

!

ALARM key: makes it possible to display of the code and resetany alarms.

Prg

PRG key: makes it possible to programme the machine'sopera ting parameters.

ON

OFF

ON/OFF key: makes it possible to switch the unit on and off.

UP key:used to scr oll through the list of parameters,

statuses and any alarms; makes it possible tomodif y set points.

MODE - ENTER key: makes it possible to switch from chiller to heat

pump operation and vic e versa.

MODE

DOWN key:used to scr oll through the list of parameters,

statuses and any alarms; makes it possible tomodif y set points.

Note:The temporary presence of two devices, on-board machi ne keyboardand remote keyboar d, will cause the on-board machine terminal to bedisabled.



TCAIY-THAIY 124 serial connection

10

Ser ia l connect ion

Ser ial conn ection for control Sup ervis ion

All units are equipped with electronic c ontrol that is set up interfacewith an external BMS via a serial c ommunication line by means ofthe KRS485 serial interface accessory (proprietar y protocol orModBus

® RTU) and the following converters.

○ KRS232 – RS485/RS232 converter for connection to supervisionsystems;○ KUSB – RS485/U SB converter for connecti on to super visionsystems.○ The FTT10 LonWorks

® compatible interface is also available.

In general, a super vision system allows access to all unit functions,such as:○ making all s ettings which are accessible through the keyboard;○ reading all process variables of the inputs and outputs, whether

digital or analogue;○ reading the various alarm codes whic h are present, and resettingthem as necessar y.

KRS485 KRS485

KRS232

KUSB

KRS485

KSC – Clo ck card Example of display

Insertion of the clock card (K SC) favours flexible and efficient useof the unit, showing the date/time and allowing management ofthe machine in dail y or weekl y start/stop time periods, with thepossibilit y to change set-points. The time periods can be set and

managed from the keyboard.

ALARM

!

Prg MODE

ONOFF

Maxi mum 200 units.

Maxi mum distance 1,000 m.



TCAIY-THAIY 124 performances

11

Performance data

Table “E”: TC AIY THAIY 90Hz cooling capacit y

Ta (°C)

25 30 35 40 45

QF P QF P QF P QF P QF P M o d e l

T u e ( ° C )

kW kW kW kW kW kW kW kW kW kW

-5 15,5 7,45 14,9 7,95 14,2 8,52 13,4 9,19 - -

-3 16,7 7,51 16,0 8,01 15,3 8,60 14,4 9,29 - -0 18,5 7,59 17,8 8,12 16,9 8,74 16,0 9,45 15,0 10,283 20,4 7,69 19,5 8,24 18,6 8,88 17,6 9,62 16,5 10,49

5 24,6 8,04 23,6 8,62 22,5 9,30 21,3 10,10 20,0 11,01

6 25,3 8,07 24,3 8,67 23,2 9,36 21,9 10,16 20,6 11,097 26,0 8,11 25,0 8,71 23,8 9,42 22,5 10,23 21,2 11,18

8 26,7 8,15 25,6 8,76 24,4 9,47 23,2 10,30 21,8 11,26

9 27,4 8,19 26,3 8,81 25,1 9,53 23,8 10,37 22,4 11,3410 28,1 8,24 27,0 8,87 25,7 9,60 24,4 10,45 22,9 11,43

12 29,6 8,33 28,4 8,97 27,1 9,72 25,7 10,60 24,1 11,61

15 31,7 8,47 30,4 9,14 29,0 9,93 27,5 10,84 - -

1 2 4

18 33,8 8,62 32,5 9,33 31,0 10,15 - - - -

Tue Evaporator outl et water temperature( ∆T inlet/outlet = 5 °C).

Ta Dry bulb external air temperature.

QF Cooling capacit y (evaporator fouling factor of 0.35 X 10-4

m²C/W).

P Power absorbed without motor-driven pump.

% variation of cooling capacit y referred to nominal conditions:

condenser inlet air temperature 35°C, chil led water outlet temperature7°C, with temperature differential of 5°C due to vario us regulationfrequency values ca used by the variation of the condenser inle t airtemperature (25÷45°C). As a first approxi mation, these curves alsoapply to outlet water temperatures other than 7°C.

0

20

40

60

80

100

30 Hz

50 Hz

70 Hz

90 Hz120

25 30 35 40 45

% variation of absorption referred to nominal conditions:

condenser inlet air temperature 35°C, chilled water outlet temperature7°C, with temperature differential of 5°C due to various regulationfrequency values caused by the variati on of the condenser inlet airtemperature (25÷45°C). As a first approxi mation, these curves alsoappl y to outl et water temperatures other than 7°C.

0

20

40

60

80

100

120

140

25 30 35 40 45

30 Hz

50 Hz

70 Hz

90 Hz

VR % capacit y variati on

Va % absorption variati on.


N.B.:To obtain the total absorbed power, add up the values of the electricity absorbed by the pump (see electrical connec tion).

With water outlet temperature between -5°C and 3°C the calculation was made considering a 30% glycol and water solution.




12

Table “G”: TH AI 90Hz heating capacit y

Tuc (°C)

35 40 45 50 53

QT P QT P QT P QT P QT P M o d e l

T a ( ° C )

R H ( % )

kW kW kW kW kW kW kW kW kW kW

-10 85 17,2 7,74 17,3 8,26 - - - - - -

-7 85 18,8 7,77 18,8 8,30 - - - - - -

-5 85 19,9 7,79 19,9 8,33 - - - - - -0 85 22,9 7,87 22,8 8,42 22,7 9,05 - - - -

5 85 26,3 7,96 26,1 8,54 25,9 9,21 25,7 9,97 25,6 10,497 85 27,8 8,01 27,5 8,60 27,3 9,28 27,1 10,06 26,9 10,59

10 85 30,1 8,08 29,8 8,69 29,5 9,39 29,2 10,20 29,0 10,74

15 85 34,1 8,23 33,7 8,87 33,3 9,61 32,9 10,46 32,7 11,04

1 2 4

20 85 38,5 8,41 38,0 9,09 37,5 9,87 37,0 10,77 36,8 11,39

Tuc Condenser outl et water temperature( ∆T inlet/outlet = 5 °C).


QT Heating capacity (evaporator fouling factor of 0.35 X 10-4

m²C/W).

P Power absorb ed without motor-driven pump.

% variation of heating capacity referred to nominal conditions:

Evaporator i nlet air temperatur e 7°C (D.B.) 6°C (W.B.), hot water outlettemperature 45°C at the flow equivalent to summer opera tion, due todifferent regulation frequenc y values c aused by the variation inevaporator inlet air temperature (-10÷20°C). As a fir st approxi mation,these curves also apply to outlet water temperatures other t han 45°C.

30 Hz

50 Hz

70 Hz

90 Hz

0

20

40

60

80

100

120

140

160

-10 - 5 0 5 10 15 20 25

% variation of absorption referred to nominal conditions:

Evaporator i nlet air temperatur e 7°C (D.B.) 6°C (W.B.), hot water outlettemperature 45°C at the flow equivalent to summer operation, due todifferent regulation frequency values caused by the variation inevaporator inlet air temperature (-10÷20°C). As a first approximati on,these cur ves also apply to outlet water temperatures other than 45°C.

30 Hz

50 Hz

70 Hz

90 Hz

0

20

40

60

80

100

120

-10 0 10 20 30

VR % capacit y variati on

Va % absorption variati on.


N.B.:To obtain the total absorbed power, add up the values of the electricity absorbed by the pump (see electrical connec tion).




13

Pressure drops and residual stat ic pressure

Pressu re drops

Graph “1”: heat exchang er pressure drops

TCAIY-THAIY 124 P1 ASP1

1

10

100

1000

100 50000 10000

∆pw ( kPa) = nominal pressure drop at the exchanger in question (tableonTechnical data):

G (l/h) = water fl ow rate at the exchanger in question;

Calculation of pressure drops○ The water flow ra te at the exchanger is calculated accordi ng to thefollowing formula:○ G = (Q x 860) : ∆T• Wher e:G (l/h) = water fl ow rate at the exchanger;

Q (kW) = exchanged power, which may be QF (for the evaporator) orQT (for the condenser), depending on the e xchanger in question;∆T (°C) = temperature differential;○ The pressure drops can be read on the graph to the si de, or can becalculated using the followi ng approximate formula:

∆pw = ∆pwnom x (G : Gnom)²

∆pwnom (kPa) = nomi nal pressure drop at the heat e xchanger inquestion (technical data):Gnom (l/h) = nominal water fl ow at the heat exchanger in question.

(technical data).

N.B.:For all machines, refer in any case to admissible operating l imits andthermal differences ( ∆T).

Residu al static pressure

Table “E”: R esidual static pressure, TC AIY – TH AIY models, installation P1

G l/h 2558 2966 3255 3620 4094 4460 4695 4800 4900124

∆pr kPa 179 168 159 146 129 115 105 101 97

Table “E”: R esidual static pressure, TC AIY – TH AIY models, installation ASP1

G l/h 2558 2966 3255 3620 4094 4460 4695 4800 4900124 ∆pr kPa 163 146 133 115 91 72 61 56 51

G = Water flow∆pr = Residual static pressure

Graph “2”: r esidual st atic pressure TCAIY-THAIY 124P1 in stallation

0

50

100

150

200

250

0 1000 2000 3000 4000 5000 6000

∆pr (l/h) = Residual static pressure

G (l/h) = Water flow

Graph “2”: r esidual st atic pressure TC AIY-THAIY 124ASP1 installation

0

50

100

150

200

250

0 1000 2000 3000 4000 5000 6000

∆pr (l/h) = Residual static pressure

G (l/h) = Water flow

Calculation of residual st atic pressureThe residual static pressure values can be obtained from graph “2” based on measured flow rates.



TCAIY-THAIY 124 operating limits

14

Operat ing l imi ts

TCAIY 124 – TH AIY 124

-10

-15

-15 -5 0 5 10 1512 20

-5

0

5

10

15

2025

30

35

40

45

T (°C) = Air temperature (D.B.).

t (°C) = Water t emperature

In summer operation:Maxi mum inlet water temperature 25°C

Temperature differentials permitted through the exchangers○ Temperature dif ferential at the evaporator ∆T = 4 ÷ 8°C

○ Minimum water pressure 0.5 Barg○ Maxi mum water pressure 3 Barg .

N.B.:The maxi mum and minimum temperature differential for t he P1 and

ASP1 machines is lin ked to the pump performances, which must alwaysbe checked with the help of the graphs on page 13.

THAIY 124

4035302520151050-5-10-1525

30

35

40

45

5053

55

T (°C) = Air temperature (B.S.).t (°C) = Water t emperature

In winter operation:Maxi mum inlet water temperature 48°C

Temperature differentials p ermitted through the exchangers

○ Temperature dif ferential at the condenser: ∆T = 4 ÷ 8°C

○ Minimum water pressur e 0.5 Barg○ Maxi mum water pressure 3 Barg .

Pow er levels and soun d pressure

Level of Level of

sound pressure b y octave bands Sound power levelModel

125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz Lp Lw124 dB(A) 60,1 53,2 63,8 73,5 66,9 55,8 50,2 75 52

Lw Sound power l evel in dB(A) on the basis of measurements made in compliance with the UNI EN-ISO 3744standard and Eurovent 8/1.

Lp Sound pressure level in dB(A), measured at a distance of 5 m from the unit, with a directio nali ty factor of 2.



TCAIY-THAIY 124 dimensions and footprints

15

Dimens ions and footpr ints

TCAIY – THAIY 124 P1 ASP1 d im en sion s and fo o tp rin ts

ION

0

O F F

a

1

2 3

4

8

910

111214

1316 15

1718

6

7 7

5

b

c

d

o p

e

f g g

n

m

i il h

Model a b c d e f g h i l m n o p

124 mm 1493 1522 504 593 1280 75 21 1448 81 340 150 195 121 56

1. Control panel;2. Isolator;3. Electrical board;

4. Compress or;5. Pump;6. Fans;7. Anti-vibration support (KSA accessory);8. Coil;

9. Protection mesh (KRP access ory);10. Expansion vessel;11. Power supply inl et;12. Water outlet;13. Water inlet;

14. Pressure gauge;

15. Condensation drain (THAIY models).16. Water s ystem drain (ASP1 i nstalla tion);17. Water buffer tank (ASP1 installation);18. Inverter acti vation.

Ins ta l la t ion

○ The unit is designed for outdoor installation.○ The unit is equipped wit h male threaded water connections.

○ Segregate the unit if installed i n areas accessible to pers ons under14 years of age.○ The unit must be positioned to comply with the mi nimumrecommended cl earances, bearing in mind the access to water andelectrical connections .

○ The unit can be equipped with anti- vibration mountings on request(KSA).○ We recommend install ing intercept valves that isolate the unit from

the rest of the system.○ It is essential to fit a metal mesh filter (square mesh of no greater

than 0.8 mm) on the unit return piping. The mesh must be of a suitablesize, wit h suitabl e pressure drops.○ However it is installed, the coil inlet air temperature (ambient air)must remain within the set limits.○ The unit may not be installed on brackets or shel ves.

○ Correct installation and positioning include levelling the unit o n asurface capable of bearing its weight.○ The THAIY unit comes co mplete with a condensation collection tray,with ductabl e drai ns.

Weights

Model 124 P1 124 ASP1

TCAIY kg 305 330

THAIY kg 313 338

The weights refer to pac kaged units without water The weight of thefully loaded unit can be obtained by adding the water contents gi ven inthe Water Co nnections chapter.

Clearanc es an d po si t ioning

L1

L2

L3

L4

Model 124 P1 124 ASP1

L1 mm 300 300

L2 mm 600 600

L3 mm with open outletL4 mm 300 300

Handl ing

○ The unit should be handled with care to avoid damage to theexternal structure and to the internal mechanical and electricalcomponents.○ To ensure correct handling, please note the position of the centre ofgravit y indicated on the packaging.

○ Do not stack the units.

○ The tempera ture limits for s torage are -9°÷45°C.



TCAIY-THAIY 124 water connections

16

Water conn ect ions

Con nect ion to the system

○ The unit is equipped with threaded male water connections and amanual air bleed valve positioned both insid e and outside the shell.○ It is necessar y to install intercept val ves that is olate the unit from the

rest of the system. It is also advisable to install elastic connec tion joints.○ A metal mesh filt er (with a square mesh measure no more than 0.8mm), of a suitabl e size and with suitable pressure drops, must be fittedon unit return pipes.

○ The water flow through the heat exchanger should not fall below thevalue correspondi ng to a temperature differential of 8°C with thecompressor at the maximum number of r.p.m.○ During long periods of inacti vit y, it is advisable to drai n the waterfrom the s ystem.○ It is possible to avoid draining the water by adding ethylene glycol tothe water circuit (see “Use of antifreeze solutions”).

○ The expansion tank is sized on the basis of the water content of theindividual machine. Any additional expansion tank should be sized bythe i nstaller on the basis of the system.

Pump ins ta l la tion

Installation wit h pump, pressur e gauge, expansion vessel, manualbleed val ve, drain valve and safety valve.

Tank & Pum p ins ta lla t ion

Installation wit h pump, water buffer tank, pressure gauge, expansionvessel, manual and automatic bleed val ve, drain valves, preparation forwater buffer tank antifreeze electric heater and safet y valve.

The inertial water buffer t ank is installed on the water circuit deli verypipe.

Maxim um water circui t con tent

All units are equipped with an expansion tank that limits the maxi mumamount of water contained in the system. If the water contents exceedthe values indic ated in the table, an additional expansion tank will be

required.

Blend with eth ylene glycol Model

0 % 10 % 20 % 30 %

124 P1 ASP1 l 190 170 160 140

Water data

Model 124 P1 - ASP1

Safet y valve barg 3

Exchanger water contents l 2.09

Tank water content ASP1 l 45

Expan sion vessel technical data

Model 124 P1 - ASP1

Capacit y l 7

Pre-charg ing barg 1

Maxi mum expansion tank pressure barg 3

Use of ant i -f reeze s olut ions

○ The use of ethylene gl ycol is recommendedif you do not wish to drain the water from thehydraulic system during the winter stoppage, orif the unit has to suppl y chilled water attempera tures l ower than 5°C The additi on of

glycol changes the physic al properties of thewater and consequentl y the perfor mance of theunit. The proper percentage of glycol to beadded to the s ystem can be obtained from themost demanding operating conditions fr om

those shown below.

○ Table "H" shows the multipli ers which allow

the changes in performance of the units to bedetermined in proportion to the requiredpercentage of ethylene glycol.• The multipliers re fer to the following

conditions: condenser inlet water temperature35°C; chilled water outlet temperature 7°C;tempera ture differ ential at evapora tor andcondenser 5°C.

• For different operating conditions, the same

coefficients can be used as their variations arenegligible.

T able “H”

% glycol in weight 10 % 15 % 20 % 25 % 30 %

Freezing temperature °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 ∆pw 1,053 1,105 1,184 1,237 1,316fc G 1,008 1,028 1,051 1,074 1,100

fc QF = Cooling capacity correction factor.fc P= Correction factor f or the absorbed

electrical current.fc∆pw = Correction factor of the pr essuredrops in the evaporatorfc G = Correction factor of the glycol water flowto the evaporator



TCAIY-THAIY 124 water circuit

17

Water ci rcui ts

Model 124 P1, Pump installation water circuit

AP1

ST2

ST1

VE

PUECH

RECF

VSM

PD

M

VS

OUT

INFAGI

GI

RI RI

RI

C

Model 124 ASP1, Tank & Pump installation water circuit

ST1

ST2

PU

ECH

RECF PD

VE

VS

SA

VSAMRAA

AP1

S

OUT

INFAGI

GI

RI RI

RI

C

C

MVSM

CF Refrigerant circuitECH Plate evaporator

RE Evaporator antifr eeze electric heaterPD Water differenti al pressure s witch

VSM Manual bleed valveVSAM Automatic/manual air bleed valve

VS Safet y valve

AP1 Electronic contr olST1 Primar y inlet temperature gauge

ST2 Primar y outlet temperature gauge- wor king and antifreeze for S tandard and Pump installa tions- antifreeze for Tan k & Pump i nstalla tions

VE Expansion vesselRAA Water buffer tank electric heater (accessor y)

FA Mesh filter (installed by the i nstaller)SA Water buffer tankM Pressure gauge

PU PumpS Water drain

C Charge/drain valveRI Interce pt valveGI Anti-vibration connection

- - - - Connections to be made by the installer



TCAIY-THAIY 124 electrical connections

18

MIQE Electrical board i nternal ter minal board;IG General isolator;L1 Line 1;L2 Line 2;

L3 Line 3;

N Neutral;PE Earth terminal;

KSC Clock card (accessor y);KRS485 RS485 serial interface (accessor y);

J13 6-way telephone connector (RJ12);

J15 Connector for KSC accessory installation;J16 Connector for KRS485, KFTT10 and

KISI accessory installa tion;MEU External user termi nal board;KTR Remote keyboard (accessor y);

KRS232 RS485/RS232 converter (accessor y);KUSB RS485/USB converter (accessor y);

PC Personal computer;SCR Remote control selector (contr ol wit h

clean contact);

SEI Summer/Winter selector (control withclean contact);

CP Pump control for Standard installation(consensus at volt age 230 Vac,maxi mum load 2A AC1);

LBG General lock light (230 Vac, maximumload 0,5 A AC1);

CS Scrolling set-point by means of the 4-20mA analogue signal (incompatible withthe DSP acc essor y). Needs to be

handled as a special access ory by ourpre-sales office;

DSP Double set-point by means of digitalconsensus (incompatible with the CSaccessory);

CACS Consent VACS (co ntrol with clean

contact);VACS 3-way di verter val ve for managing the

produc tion of domestic hot water(KVDEV) (230 Vac, maxi mum load 0,5 A

AC1);- - - - Connection to be made by the installer;

6 wire telephone cable (maximumdistance 50 m, for greater distancescontact RHOSS S.p.A. customer

service).

○ The electrical panel can be accessed through thefront panel of the unit.

○ Connections must be made by skilled personnel incompliance with current standards and with thediagrams provided with the machine.○ Always install a general isolator in a protected areanear the appliance with a delayed characteristic curve

of a suitable capacity and breaking capacity. Make surethe general isolator includes a 3mm mini mum openingdistance between contacts.○

Earth connection is compulsory by law andsafeguar ds the user while the machi ne is in use.

Electr ical con nect ions

L1

L2

L3

N400V-3ph+N-50Hz

MEUMIQE

SCR

KTR

SEI

P E

I G

I D 7

I D 8

J 8

KRS232

/ KUSB+

-

G N D

KRS485

KSC

+

-

G N D

J 1 6

S E R I A L

C A R D

J 1 3

I N T E R F A C E

P L A N

J 1 5

C L O C K C A R D

ALARM

!

Prg MODE

ON

OFF

PC

LBG

CS

DSP

CACS

VACS

CP

P

E

KMDM

AC

+

~

~

-

M o d e m

DC

ATTENTION!

The diagrams onl y show the connections to be made by the i nstaller.For electrical connections to the unit and the accessories, follow the wiring diagrams which

are supplied with them.

Cable section 124

Line section mm² 6

PE sec tion mm² 6

Remote control section mm² 1,5



RHOS S S .P.A. declines all respons abilities for

possible mistakes in the catalogue and reserves the

right to alter the features of their products without

notice in the interests of continuous improvement.

TC A IY -T H A IY 1 2 4

Y-Mich range

RHOSS S.P.A.Via O ltre Fe rrovia, 32 - 33033 C odro ipo (UD) - Italytel. + 39 0432 911611 - fax + 39 0432 [email protected] - www.rhoss.it - www.rhoss.com

IR GROUP S.A.S.7 rue du Pont à Lunettes - 69390 Vourles - Francetél. + 33 (0)4 72318631 - fax + 33 (0)4 [email protected]

RHOS S Deutschland GmbHHölzlestraße 23, D-72336 Ba lingen, O TEng stlatt - G ermany

tel. + 49 (0)7433 260270 - fax + 49 (0)7433 [email protected] - www.rhoss.de

R H OS S ME R C OS U RBe njamin C onsta nt 576 - 1er Piso C .P. 1214 - Asuncion Pa ragua ytel/fax + 595 21 493 897 - ww w.rhoss mercosur.c om

Sedi comm erciali Italia: / Italy branch offices:

Area Nord-Est: 33033 C odro ipo (UD) - Via Oltre Ferrovia , 32tel. + 39 0432 911611 - fax + 39 0432 911600

Area N ord-Ovest: 20041 Agrate Brianza (MI)C entro C olleoni - P a lazzo Taurus, 1tel. + 39 039 6898394 - fax + 39 039 6898395

Area Centro-Sud: 00199 Roma - Viale So malia , 109tel. + 39 06 8600699-707 - fax + 39 06 8600747

Area Sud: 80143 Napoli - Via G . P orzio - C entro Direzionale - Isola G 8tel. + 39 081 7879121 - fax + 39 081 7879135

06 rhoss tcaiy-thaiy 124 y-mich en nt

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