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Installation
Co
Operation
Maintenance
RAUS/RAUX condensing units
Air cooled chillers and heat pumps condensing units with scroll
compressors
RAUS 040 – 150 Cooling capacity 16.5-52.2 kW
RAUX 040 – 140 Cooling capacity 15.2-48.2 kW
July 2021
Heating capacity 17.1-53.7 kW
CG-SVX052A-GB
Original instructions
Page 1
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Summary of Contents for Trane RAUS 040
- Page 1 Operation Maintenance RAUS/RAUX condensing units Air cooled chillers and heat pumps condensing units with scroll compressors RAUS 040 – 150 Cooling capacity 16.5-52.2 kW RAUX 040 – 140 Cooling capacity 15.2-48.2 kW Heating capacity 17.1-53.7 kW July 2021 CG-SVX052A-GB Original instructions...
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Page 2: Table Of Contents
INDEX OVERVIEW ................................. 3 SAFETY REGULATIONS ............................3 OPERATING LIMITS..............................6 INSTALLATION ................................8 ACOUSTIC PROTECTION ............................10 ELECTRICAL POWER SUPPLY ..........................10 HOW TO SIZE REFRIGERANT LINES ........................11 LIQUID RECEIVER ..............................19 REMOTE TERMINALS CONTROL AND EXPANSION VALVE ................22 ELECTRICAL PANEL ............................ -
Page 3: Overview
Photographic evidence must be provided for macroscopic damage. The card must be sent to TRANE within 8 days of receiving the goods: if it is not sent back or delayed, the complaint will not be accepted. - Page 4 2.2 GENERAL PRECAUTIONS The operator must only intervene on the unit commands; he or she must not open any panels except for the one which gives access to the command module. The installer must only intervene on the connections between the plant and the machine; he or she must not open any machine panels nor carry out any commands.
- Page 5 • if the unit is to be moved after a year of being in the site or if it has to be dismantled contact TRANE. IMPORTANT! No refrigerant high pressure safety valve is installed on RAUS / RAUX units.
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Page 6: Operating Limits
In case of doubt, consult the factory. These operating limits apply to unit operating at full load. 3.3 OPERATING RANGE RAUS 040-150 – COOLING MODE OAT = Outdoor Air Temperature [°C] ET = Evaporating Temperature [°C]... - Page 7 RAUX 040-140 – COOLING MODE kit -10 °C OAT = Outdoor Air Temperature [°C] ET = Evaporating Temperature [°C] RAUX 040-140 – HEATING MODE OAT = Outdoor Air Temperature [°C] CT = Condensing Temperature [°C] Page 7...
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Page 8: Installation
INSTALLATION 4.1 MOVING AND POSITIONING THE UNIT The units have been designed to be lifted from above by means of eyebolts and holes in the base members. Use retractor bars to keep the lifting wires or chains away from the unit. Correct lifting procedure Figure 1 Lifting procedures provided with the unit have to be respected. - Page 9 4.2 MINIMUM SPACE REQUIREMENTS Dimensional drawing shall be respected to avoid: • Noise • Incorrect heat exchange and ventilation • Difficult maintenance or inaccessibility to components It is fundamental to respect minimum distances on all units to ensure optimum ventilation for the condenser coils. Limited installation space could reduce the normal air flow, thus significantly reducing the unit performance and considerably increasing consumption of electrical energy.
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Page 10: Acoustic Protection
ACOUSTIC PROTECTION When the sound level must be checked, to pay maximum attention to isolate the unit base frame properly applying the anti-vibration mounts (provided optionally). Also, install flexible joints on water connections. ELECTRICAL POWER SUPPLY The mains power supply characteristics must match the unit’s absorption. The mains power supply tension must correspond to the nominal value ±... -
Page 11: How To Size Refrigerant Lines
HOW TO SIZE REFRIGERANT LINES In the dimensioning of refrigerant lines of air conditioning systems equipped with two sections, the designer has to take into account that, due to the pressure loss of the refrigerant circuits, cooling capacity decrease and compressors power input increase may occur. It is also necessary to consider that the fluid changes its state when circulating within the plant. - Page 12 Additional R410A refrigerant charge for a linear meter of pipe Diameter (mm) Gas (Kg/m) Liquid (Kg/m) 0.0014 0.0133 0.005 0.051 0.008 0.079 0.014 0.139 0.019 0.182 0.029 0.285 0.045 0.445 0.074 0.729 0.111 1.082 0.182 1.779 0.281 2.721 0.289 2.825 0.377 3.689 7.2 LENGTH...
- Page 13 If different pressure drops are needed, the cooling capacity shall be corrected with the following formula: Where: Pf: cooling capacity P : cooling capacity shown into the table 1 Le : equivalent length of the table 1 Leff : actual equivalent length ΔT : required pressure drop ΔTtab: pressure drop shown into the table 1 The equivalent length can be calculated as follows:...
- Page 14 with symbols having the same meaning as in formula [1] In order to verify if the selected diameter could be correct the following maximum pressure drops shall be considered according to ASHRAE: Liquid line: ΔPmax = 0,5÷1 K Suction line: ΔPmax = 1 K Discharge line: ΔPmax = 1 K Example: How to choose the proper tube diameter.
- Page 15 In such cases, very common for unit of big capacity, it is necessary to size the plant according to the minimum compressor capacity, and not in accordance to the full load capacity. In Tables 3 and 4, the allowed capacities at partial load condition are shown, both for the suction and discharge lines. Table 3: Minimum capacity (kW) ensuring the oil flowing in vertical sections of the suction line (R410a refrigerant).
- Page 16 It might be guessed that to guarantee the proper speed ensuring the correct oil flow, if the compressor is working at partial loads, the diameter shall be reduced, therefore a too much high speed is obtained when the compressor is working at full load. This is cause of excessive pressure drops.
- Page 17 If the two evaporators are installed at different levels there are two possible solutions shown in Figure 2. On the discharge line, there is the same problem due to the oil flow on the suction line. The solution to the problem is the same. In this case, the most important issue could be the oil drop towards the compressor.
- Page 18 7.4 PRECAUTIONS FOR REFRIGERANT LINE SIZING • Suction line must always be insulated to avoid condensate formation. • The liquid line must be insulated if the outdoor temperature is higher than the liquid temperature. (approximately 5°C less than the condensing temperature) •...
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Page 19: Liquid Receiver
– V Receiver V1: volume of the unit’s heat exchanger (please contact TRANE to obtain this information) V2: Volume of the remote heat exchanger. If V receiver has positive sign, the receiver shall be placed so as to be filled in heat pump mode and discharged in chiller, otherwise it shall be placed so as to be filled in chiller mode and emptied in the heat pump. - Page 20 8.2 INSTALLATION DIAGRAM AND PLACING OF THE LIQUID RECEIVER RAUS 040-150 REFRIGERANT 410a CONNECTION BY THE CUSTOMER INDEX INDEX CARTER HEATER CONDENSING COIL COMPRESSOR EXPANSION VALVE HP PRESSURE SIGHT GLASS SERVICE VALVE HP TRANSDUCER LP TRANSDUCER FILTER EVAPAPORATING SHUT OFF VALVE (OPTION)
- Page 21 RAUX 040-140 REFRIGERANT 410a Liquid receiver in heat pump mode Liquid receiver in chiller mode CONNECTION BY THE CUSTOMER CONNECTION BY THE CUSTOMER INDEX INDEX CARTER HEATER MECHANICAL EXPANSION VALVE COMPRESSOR SIGHT GLASS HP PRESSURE SWITCH HP TRANSDUCER SERVICE VALVE FILTER PRESSURE SWITCH TO SWITCH OFF ONE FAN IN PFV24...
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Page 22: Remote Terminals Control And Expansion Valve
As mentioned in the previous paragraph, the liquid receiver location for RAUX versions shall be evaluated in accordance to the refrigerant charge delta of the two cycles. If the higher refrigerant charge is required for the chiller mode the liquid receiver shall be placed in a location that ensure the proper filling during the operation in heat pump mode and the proper emptiness during chiller mode. -
Page 23: Electrical Panel
The electrical panel supply is 400V/3ph+n/50Hz suitable for TN-S system and no additional power supply is necessary. If the unit is powered by a TN-C, TT or IT power supply system the TRANE catalogue option “power supply without neutral 400V/3ph/50Hz” must have been ordered and implemented in the unit’s electrical cabinet. -
Page 24: Operator Responsabilities
11 OPERATOR RESPONSABILITIES It is important that the operator is properly trained and familiar with the equipment before working on the unit. In addition to reading this manual, the operator must study the manual operation of the microprocessor and the wiring diagram to understand the sequence of start- up, operation, shutdown sequences, and the criterion of operation of all safety devices. -
Page 25: Check List - Mandatory Operation Control Before Start-Up
SITE: ADDRESS: POSTCODE: COUNTRY: THE INTENDED PURPOSE OF RAUS / RAUX UNITS IS NOT FOR INDUSTRIAL PROCESS APPLICATION. PLEASE CONTACT TRANE TECHNICAL DEPARTMENT IN CASE OF INDUSTRIAL PROCESS APPLICATION. GENERAL COMPLIANCE THE UNIT DISPLAYS DENTS OR DAMAGES ON THE EXTERNAL CASING OCCURRED DURING THE TRANSPORTATION OR POSITIONING. - Page 26 AN ELECTRONIC SUPERVISOR (OR ANY ADDITIONAL CONTROLLER) HAS BEEN INSTALLED. THE CONNECTION WIRES ARE SHIELDED. REMOTE CONTROL DEVICES OR INTERFACES ARE CONNECTED TO THE ELECTRICAL PANEL IN CONFORMITY WITH TRANE WIRING DIAGRAMS ELECTRONIC DEVICES ARE INTACT AND DON’T DISPLAY ANY DAMAGE. THE ELECTRICAL ABSORPTION IS STANDARD.
- Page 27 13.1 REFRIGERANT CHARGE 13.1.1 Refrigerant replacement procedure with unit stopped and in vacuum (refrigerant charge in the liquid phase) Open the shut off valve as far as possible so that it closes the service coupling. Connect the refrigerant cylinder to the service coupling without tightening the coupling.
- Page 28 13.1.2 Refrigerant replacement procedure with unit running (refrigerant charge in the vapour phase) Caution: charge vapour only. Do not charge liquid because it may damage the compressor. Connect the refrigerant cylinder to the service valve without tightening the coupling. Drain the connection piping and tighten the coupling.
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Page 29: Maintenance
14 MAINTENANCE Maintenance operations are fundamental in order to keep the units running properly, from both a purely functional and an energetic points of view. Every unit comes with a logbook, in which the user or the person delegated to machine maintenance can keep all the required notes, in order to keep a historical log. - Page 30 “dirty” or corrosive environment. Cleaning with cleansers or detergents is strongly discouraged due to the all- aluminum construction; straight water should prove sufficient, if not please contact TRANE. Any breach in the tubes can result in refrigerant leaks IMPORTANT: Only in extreme cases should any type of chemical cleaner or detergent be used on microchannel coils.
- Page 31 14.4 ORDINARY MAINTENANCE Activities list week Month (1) Year (2) General: Data collection operation (3) Visually inspect the unit for any damage and / or looseness Verifying the integrity of the thermal insulation Clean and paint where needed Electric: Check the correct operation of the equipment on the unit Check the wear of contactors - Replace if necessary Check tightness of all electrical terminals - Tighten if necessary Clean the inside of the electrical panel...
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Page 32: Recommended Spare Parts
RECOMMENDED SPARE PARTS There follows a list of the recommended parts for several years’ running. TRANE is at your disposal to recommend a personalised list of accessories according to the commissioned order, including the part number of the equipment. 1 YEAR... -
Page 33: Troubleshooting
TROUBLESHOOTING Who can take corrective action U Symptom Cooling Heating = User Probable cause Possible remedy S = specialised personnel Probe faulty service Check and replace if necessary. A The unit does Lack of consent of the high or low See points D-E not start pressure... - Page 34 Who can take corrective action U Symptom Cooling Heating = User Probable cause Possible remedy S = specialised personnel Pressure switch out of order Check and replace. Machine completely void of See point G. refrigerant Finned coil clogged, airflow rate is Remove dirt from the coil.
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Page 35: Improper Uses
Who can take corrective action U = User Symptom Cooling Heating Probable cause Possible remedy S = specialised personnel Expansion device that is not working Verify and replace. properly Water circulation pump blocked Unlock the pump. M Frost in the compressor intake Water circulation pump defective Check the pump and replace if necessary. - Page 36 Trane – by Trane Technologies ( NYSE: TT), a global climate innovator – creates comfortable, energy efficient indoor environments through a b road portfolio of heating, ventilating and air conditioning systems and controls, services, parts and supply. For more information, please visit trane.eu or tranetechnologies.com.
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