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5

in accordance with the national usage regulations:
• 

These relief valves and fuses are not safety accessories 
but damage limitation accessories in case of a fire,

• 

The high pressure switches are the safety accessories.

The relief valve must only be removed if the fire risk is 
fully controlled and after checking that this is allowed by 
local regulations and authorities. This is the responsibility 
of the operator.

When the unit is subjected to fire, safety devices prevent 
rupture due to over-pressure by releasing refrigerant. The 
fluid may then be decomposed into toxic residues when 
subjected to the flame:

• 

Stay away from the unit

• 

Set up warnings and recommendations for personnel 
in charge to stop the fire.

• 

Fire extinguishers appropriate to the system and the 
refrigerant type must be easily accessible.

The external relief valves must in principle be connected 
to discharge pipes for units installed in a room. Refer to 
the installation regulations, for example those of European 

standards EN 378 and EN 13136.

They include a sizing method and examples for configura-
tion and calculation. Under certain conditions these stan-
dards permit connection of several valves to the same 
discharge pipe. Note: Like all other standards these EN 
standards are available from national standards organi-

sations. 

These pipes must be installed in a way that ensures that 
people and property are not exposed to refrigerant leaks. 
These fluids may be diffused in the air, but far away from 
any building air intake, or they must be discharged in a 
quantity that is appropriate for a suitably absorbing 

environment.

It is recommended to install an indicating device to show 

if part of the refrigerant has leaked from the valve. The 
presence of oil at the outlet orifice is a useful indicator 
that refrigerant has leaked. Keep this orifice clean to 
ensure that any leaks are obvious.

The calibration of a valve that has leaked is generally 
lower than its original calibration. The new calibration 
may affect the operating range. To avoid a nuisance 
tripping or leaks, replace or re-calibrate the valve.

Periodic check of the relief valves: See paragraph 1.3 
“Maintenance safety considerations”.

Provide a drain in the discharge circuit, close to each 
relief valve, to avoid an accumulation of condensate or 

rain water. 

Ensure good ventilation, as accumulation of refrigerant 
in an enclosed space can displace oxygen and cause 
asphyxiation or explosions.

Inhalation of high concentrations of vapour is harmful 
and may cause heart irregularities, unconsciousness, or 

death. Vapour is heavier than air and reduces the amount 

of oxygen available for breathing. These products cause 

eye and skin irritation. Decomposition products are 

hazardous.

1.2 - Equipment and components under pressure

The units are intended to be stored and operate in an 
environment where the ambient temperature must not be 
less than the lowest allowable temperature indicated on 
the nameplate. See section “11.2 - Pressure vessels”.

1.3 - Maintenance safety considerations

Carrier recommends the following drafting for a logbook 
(the table below should not be considered as reference 
and does not involve Carrier responsibility):

Intervention

Name of the 

commissioning 

engineer

Applicable 

national 

regulations

Verification 

Organism

Date

Nature

 (1)

(1)   Maintenance, repairs, regular verifications (EN 378), leakage, etc.

Engineers working on the electric or refrigeration compo-

nents must be authorized, trained and fully qualified to do so.

All refrigerant circuit repairs must be carried out by a trained 

person, fully qualified to work on these units. He must have 

been trained and be familiar with the equipment and the 
installation. All welding operations must be carried out by 

qualified specialists.

The insulation must be removed and heat generation must 
be limited by using a wet cloth.

Any manipulation (opening or closing) of a shut-off 
valve must be carried out by a qualified and authorised 
engineer. These procedures must be carried out with the 
unit shut-down.

NOTE: The unit must never be left shut down with the 
liquid line valve closed, as liquid refrigerant can be trapped 
between this valve and the expansion device. (This valve 
is situated on the liquid line before the filter drier box.)

Equip the engineers that work on the unit as follows:

Personal protection 

equipment (PPE) 

(1)

Operations

Handling Maintenance, 

service

Welding or brazing

(2)

Protective gloves,

eye protection,

safety shoe,

protective clothing.

Fuse plug

x

x

x

Ear protection.

x

x

Filtering respirator.

x

(1)  We recommend to follow the instructions in EN 378-3.

(2)  Performed in the presence of A1 refrigerant according to EN 378-1.

Never work on a unit that is still energized. 

Never work on any of the electrical components, until the 
general power supply to the unit has been cut using the 
disconnect switch(es) in the control box(es). 

Summary of Contents for 30XW

Page 1: ...A N D M A I N T E N A N C E I N S T R U C T I O N S Water Cooled Screw Chillers Water sourced screw heat pumps 30XW 30XW P A 30XWH 30XWHP A Original instructions Nominal cooling capacity 273 1756 kW Nominal heating capacity 317 1989 kW 50 Hz ...

Page 2: ...nect switch 16 5 4 Recommended wire sections 16 5 5 Power cable entry 17 5 6 Field control wiring 17 5 7 24 and 230 V power reserve for the user 18 6 APPLICATION DATA 18 6 1 Operating limits for 30XW units 18 6 2 Minimum chilled water flow 18 6 3 Maximum chilled water flow 18 6 4 Condenser water flow rate 18 6 5 Standard and optional number of water passes 19 6 6 Evaporator and condenser water flo...

Page 3: ... 5 and 6 26 10 2 Electrical data units with options 5 and 6 27 10 3 Dimensions clearances units with option 5 and 6 27 10 4 Operating range units with options 5 and 6 27 10 5 Minimum recommended evaporator flow rate with options 5 and 6 27 10 6 Nominal evaporator pressure drop with options 5 and 6 27 11 MAJOR SYSTEM COMPONENTS AND OPERATION DATA 28 11 1 Direct drive twin screw compressor with vari...

Page 4: ... in the right place and direction on the unit The units can also be lifted with slings using only the designated lifting points marked on the unit Use slings or lifting beams with the correct capacity and always follow the lifting instructions on the certified drawings supplied with the unit Do not tilt the unit more than 15 Safety is only guaranteed if these instructions are carefully followed If...

Page 5: ...ation as accumulation of refrigerant in an enclosed space can displace oxygen and cause asphyxiation or explosions Inhalation of high concentrations of vapour is harmful and may cause heart irregularities unconsciousness or death Vapour is heavier than air and reduces the amount of oxygen available for breathing These products cause eye and skin irritation Decomposition products are hazardous 1 2 ...

Page 6: ...lock the power supply circuit in the open position ahead of the machine If the work is interrupted always ensure that all circuits are still deenergized before resuming the work ATTENTION Even if the unit has been switched off the power circuit remains energized unless the unit or circuit disconnect switch is open Refer to the wiring diagram for further details Attach appropriate safety labels Ope...

Page 7: ...nders to a place designated for their recovery Do not incinerate ATTENTION Only use refrigerant R134a in accordance with 700 AHRI Air conditioning Heating and Refrige ration Institute The use of any other refrigerant may expose users and operators to unexpected risks If the refrigerant circuit remains open for longer than a day after an intervention such as a component replacement the openings mus...

Page 8: ...tion any safety devices when corrosion or build up of foreign material rust dirt scale etc is found within the valve body or mechanism If necessary replace the device Do not install relief valves in series or backwards ATTENTION No part of the unit must be used as a walk way rack or support Periodically check and repair or if necessary replace any component or piping that shows signs of damage The...

Page 9: ...agrams During the installation test national regulations must be followed If no national regulation exists standard EN 378 can be used as a guide External visual installation checks Ensure that the machine is charged with refrigerant Verify on the unit nameplate that the fluid being transported is R 134a and is not nitrogen Compare the complete installation with the refrigeration system and power ...

Page 10: ...44 3059 168 3 168 3 2800 702 1848 968 1044 3059 168 3 168 3 2800 802 1848 968 1044 3059 168 3 168 3 2800 852 1898 828 1044 2780 219 1 168 3 2600 High efficiency units 30XW P 30XWHP 512 1743 968 936 3059 168 3 168 3 2800 562 1743 968 936 3059 168 3 168 3 2800 712 1950 1083 1065 3290 219 1 219 1 3100 812 1950 1083 1070 3290 219 1 219 1 3100 862 1950 1083 1070 3290 219 1 219 1 3100 Standard efficienc...

Page 11: ...1252 2051 1512 1162 4730 219 1 219 1 4500 1352 2051 1512 1162 4730 219 1 219 1 4500 1452 2051 1512 1162 4730 219 1 219 1 4500 1552 2051 1512 1162 4730 219 1 219 1 4500 High efficiency units 30XW P 30XWHP 1012 1997 1512 1039 4730 219 1 219 1 4500 1162 1997 1512 1039 4730 219 1 219 1 4500 1314 2051 1512 1162 4730 219 1 219 1 4500 1464 2051 1512 1162 4730 219 1 219 1 4500 Standard efficiency units 30...

Page 12: ...for maintenance Recommended space for tube removal Water inlet Water outlet Power supply connection Dimensions in mm A B C D E F G Standard efficiency units 30XW 30XWH 1652 1515 1568 1902 4790 219 1 219 1 4500 1702 1515 1568 1902 4790 219 1 219 1 4500 High efficiency units 30XW P 30XWHP 1612 1562 1591 2129 4832 273 1 273 1 4600 1762 1562 1591 2129 4832 273 1 273 1 4600 Standard efficiency units 30...

Page 13: ...3 8 3 8 3 8 3 8 3 8 3 8 3 8 3 8 3 8 3 8 3 8 3 8 3 8 Max water side operating pressure kPa 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 High efficiency units 30XW P 30XWHP 512 562 712 812 862 1012 1162 1314 1464 1612 1762 Sound levels standard unit Sound power level 1 dB A 99 99 99 99 99 102 102 102 102 102 102 Sound pressure level at 1 m 2 dB ...

Page 14: ...4 490 556 580 650 615 650 High efficiency units 30XW P 30XWHP 512 562 712 812 862 1012 1162 1314 1464 1612 1762 Power circuit Nominal power supply V ph Hz 400 3 50 Voltage range V 360 440 Control circuit 24 V via the built in transformer Nominal start up current Circuit A A 414 414 587 587 587 414 414 587 587 587 587 Circuit B A 414 414 414 587 587 587 Option 81 A 556 574 747 780 801 819 Maximum s...

Page 15: ...56 224 388 1210 0 81 0 88 06TUA483 162 275 215 300 587 1828 0 85 0 91 06TUA554 171 300 234 330 587 1828 0 85 0 91 06TVA680 210 400 312 419 629 1919 0 85 0 90 06TVA753 230 430 335 455 629 1919 0 86 0 90 06TVA819 250 460 359 476 629 1919 0 87 0 90 Value at standard Eurovent conditions evaporator entering leaving water temperature 12 C 7 C condenser entering leaving water temperature 30 C 35 C Value ...

Page 16: ...switches The control box includes the following standard features One main disconnect switch per circuit Starter and motor protection devices for each compressor Anti short cycle protection devices Control devices Field connections All connections to the system and the electrical installations must be in full accordance with all applicable codes The Carrier 30XW units are designed and built to ens...

Page 17: ...5 200 200 XLPE Cu 1 x 240 1 x 240 400 400 PVC Cu 1012 2 x 240 2 x 240 1 x 120 1 x 95 230 200 XLPE Cu 1 x 240 1 x 240 400 401 PVC Cu 1052 1154 1162 2 x 240 2 x 240 1 x 120 1 x 120 220 220 XLPE Cu 2 x 120 2 x 120 375 375 PVC Cu 1252 1314 2 x 240 2 x 240 1 x 150 1 x 120 220 220 XLPE Cu 2 x 185 2 x 120 410 375 PVC Cu 1352 1464 2 x 240 2 x 240 1 x 150 1 x 150 220 220 XLPE Cu 2 x 185 2 x 185 410 410 PVC...

Page 18: ...ld control wiring Unit without option 084 2 A 24 V a c or 48 VA Unit with option 084 1 3 A 24 V a c or 30 VA 084 or 084R or 084D As an option a the 230 V 50 Hz circuit allows the supply of a battery charger for a portable computer at 1 A maximum at 230 V The connection is via a CEE7 7 type socket 2 poles with earth located under the control box and accessible from outside 6 APPLICATION DATA 6 1 Op...

Page 19: ...1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Condenser Standard 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Option 102C 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 High efficiency units 30XW P Size 512 562 712 812 862 1012 1162 1314 1464 1612 1762 Evaporator Standard 2 2 2 2 2 2 2 2 2 2 2 Option 100C 1 1 1 1 1 1 1 1 1 1 1 Condenser Standard 2 2 2 2 2 2 2 2 2 2 2 Option 102C 1 1 1 1 1 1 1 1 1 1 1 6 6 Evaporator and c...

Page 20: ...1 12 10 20 30 40 50 60 70 80 90 100 110 120 0 10 20 30 40 50 60 70 80 90 100 110 120 1 2 3 4 9 12 11 10 7 8 5 6 3 6 9 12 15 18 21 24 27 30 33 36 0 10 20 30 40 50 60 70 80 90 100 110 1 2 3 4 5 6 7 8 9 12 11 10 Legend 1 254 2 304 3 354 4 402 452 552 602 5 512 562 6 652 702 802 7 852 8 1002 1052 9 1154 10 712 812 862 11 1012 1162 12 1252 1352 1452 1552 13 1314 1464 14 1652 1702 15 1612 1762 Legend 1 ...

Page 21: ...regard to the design operating pressures Before any start up verify that the heat exchange fluid is compatible with the materials and the water circuit coating The use of different metals on hydraulic piping could generate eletrolytic pairs and consequently corrosion Verify then the need to install sacrificial anodes In case additives or other fluids than those recommend ed by Carrier are used ens...

Page 22: ...6 6 6 6 8 8 8 8 8 8 8 Actual outside diameter mm 141 3 141 3 141 3 141 3 141 3 141 3 141 3 168 3 168 3 168 3 168 3 168 3 168 3 219 1 219 1 219 1 219 1 219 1 219 1 219 1 Option 100C Nominal diameter in 5 5 5 6 6 6 6 6 6 6 6 6 6 8 8 8 8 8 8 8 Actual outside diameter mm 141 3 141 3 141 3 168 3 168 3 168 3 168 3 168 3 168 3 168 3 168 3 168 3 168 3 219 1 219 1 219 1 219 1 219 1 219 1 219 1 Condenser Un...

Page 23: ...pening and closing by the control of each unit in this case the valves are controlled using the dedicated water pump outputs See the 30XA 30XW Pro Dialog Control IOM for a more detailed explanation 30XW with configuration leaving water control 8 HEAT MACHINE UNITS 30XWH AND 30XWHP 8 1 Physical data for Heat Machine units The physical data for the Heat Machine units 30XWH 30XWHP are the same as for...

Page 24: ...8 3 8 3 8 3 8 3 8 3 8 3 8 3 8 3 8 Max water side operating pressure kPa 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 High efficiency units option 150 30XW P 30XWHP 512 562 712 812 862 1012 1162 1314 1464 1612 1762 Sound levels unit with option 150 Sound power level 1 dB A 99 99 102 102 102 102 102 105 105 105 105 Sound pressure level at 1 m 2 ...

Page 25: ...HP 512 562 712 812 862 1012 1162 1314 1464 1612 1762 Power circuit Nominal power supply V ph Hz 400 3 50 Voltage range V 360 440 Control circuit 24 V via the built in transformer Nominal start up current Circuit A A 587 587 772 772 772 587 587 772 772 772 772 Circuit B A 587 587 587 772 772 772 Option 81 A 749 757 943 965 986 1004 Maximum start up current Circuit A A 587 587 772 772 772 587 587 77...

Page 26: ...start up 35 0 C Leaving temperature during operation 3 3 C 1 15 0 C Entering leaving temperature difference at full load 2 8 K 11 1 K Condenser Entering temperature at start up 13 0 C 2 Leaving temperature during operation 23 0 C 2 63 0 C Entering leaving temperature difference at full load 2 8 K 11 1 K 1 For low temperature applications where the leaving water temperature is below 3 3 C a frost p...

Page 27: ...d but performances are not optimised Full load with option 5 6 and ethylene or propylene glycol Part load limit approx 80 Part load limit approx 50 Part load limit approx 30 EG 5 PG 5 EG 6 PG 6 10 5 Minimum recommended evaporator flow rate with options 5 and 6 Option 5 medium temperature Option 6 low temperature Reference number P0512 P0562 P1012 1154 P0512 P0562 P1012 1154 Minimum evaporator flow...

Page 28: ...water connection of the heat exchanger is a Victaulic connection The products that may be added for thermal insulation of the containers during the water piping connection procedure must be chemically neutral in relation to the materials and coatings to which they are applied This is also the case for the products originally supplied by Carrier 11 MAJOR SYSTEM COMPONENTS AND OPERATION DATA 11 1 Di...

Page 29: ...vaporator via the principal EXV This permits increasing the cooling capacity of the system as well as its efficiency 11 3 High pressure safety switch 30XW units are equipped with high pressure safety switches In accordance with the applicable code the high pressure switches with manual reset called PZH former DBK may be backed up by high pressure switches that require resetting with a tool The hig...

Page 30: ...nser with reversed water inlet outlet Easy installation on sites with specific requirements 254 1762 J Bus gateway 148B Bi directional communication board complying with JBus protocol Connects the unit by communication bus to a building management system 254 1762 Lon gateway 148D Bi directional communication board complying with Lon Talk protocol Connects the unit by communication bus to a buildin...

Page 31: ...C 25 Tunnel terminal screw water pump disconnect Disconnect switch 3RV101 QM90 2 5 Disconnect switch 3RV102 QM90 2 5 Disconnect switch 3RV103 QM90 4 Tunnel terminal screw water pump contactor Contactor 3RT102 KM90 2 5 Contactor 3RT103 KM90 4 13 STANDARD MAINTENANCE Air conditioning equipment must be maintained by profes sional technicians whilst routine checks can be carried out locally by special...

Page 32: ... bar The pressure drop across the filter can be determined by measuring the pressure at the discharge port at the oil separator and the oil pressure port at the compressor The difference in these two pressures will be the pressure drop across the filter check valve and solenoid valve The pressure drop across the check valve and solenoid valve is approximately 0 4 bar which should be subtracted fro...

Page 33: ...the compressor a low pressure switch is included with the compressor This low pressure switch should be temporarily installed as a hard safety on the high pressure part of the compressor The purpose of this switch is to protect the compressor against any wiring errors at the compressor terminal pin The electrical contact of the switch would be wired in series with the high pressure switch The swit...

Page 34: ... Electrical circuit wiring has been sized and installed properly Unit ground wire has been connected Electrical circuit protection has been sized and installed properly All terminals are tight All chilled water valves are open All chilled water piping is connected properly All air has been vented from the chilled water circuit The unit is switched off again after the pump test has been completed C...

Page 35: ...s nominal kW capacity for air conditioning 6 5 litres nominal kW capacity for process cooling Proper loop volume established Proper loop corrosion inhibitor included litres of Proper loop freeze protection included if required litres of Piping includes electric heater tape if exposed to temperatures below 0 C Inlet piping to cooler includes a 20 mesh strainer with a mesh size of 1 2 mm Check press...

Page 36: ...des order No 13458 03 2017 Manufacturer Carrier SCS Montluel France Manufacturer reserves the right to change any product specifications without notice Printed in the European Union www eurovent certification com www certiflash com ...

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