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Trane RTRA 107, Installation Operation & Maintenance, Page: 1 / 32

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R

TRA

Screw compressor liquid chillers with centrifugal fans, air cooled

RTRA

Screw compressor liquid chillers
with centrifugal fans, air cooled

Installation
Operation
Maintenance

This manual should be used jointly

with the manual of the UCM-CLD

reference L80 IM 025 E

D

20 

IM 

001 

GB

Sizes :  107 - 108 - 109 - 110

Summary of Contents for RTRA 107

Page 1: ...ugal fans air cooled RTRA Screw compressor liquid chillers with centrifugal fans air cooled Installation Operation Maintenance This manual should be used jointly with the manual of the UCM CLD reference L80 IM 025 E D20 IM 001 GB Sizes 107 108 109 110 ...

Page 2: ... at the same time The unit should be totally inspected within 7 days of delivery If any concealed damage is discovered send a registered letter of protest to the carrier within 7 days of delivery and notify the local sales office Units are shipped with the refrigerant operating or hold ing charge and should be examined with an electronic leak detector to determine the hermetic integrity of the uni...

Page 3: ...recommendations 15 Wiring 16 Remote CLD 18 Installation Operating principles 18 Refrigeration cycle 18 Oil system 21 Pre start procedure 23 Start up procedure 24 Shut down procedure 24 Operation Weekly monthly and annual maintenance 26 Chemically cleaning the evaporator 27 Start log sheet 28 Installation checklist 29 Safety recommendations 32 Maintenance contract 32 Training 32 Maintenance 3 ...

Page 4: ...r packing material Inspect the unit for concealed damage as soon as possi ble after delivery and before it is stored Concealed dam age must be reported within 15 days If concealed damage is discovered stop unpacking the shipment Do not remove damaged materail from the receiving location Take photos of the damage if possi ble The owner must provide reasonable evidence that the damage did not occur ...

Page 5: ...Figure 2 Control panel Figure 3 Starter panel 5 Warning Panel or box signed by enclosed parts under voltage Their opening requires a special key and must be done by qualified engineers ...

Page 6: ... 110 HE Compressor size CHHN60CHHN60 CHHB70 CHHB70 CHHB70 CHHB85 CHHB85 CHHB85 CHHB100 CHHB100 CHHB100 Compressor 400 50 3 A 128 128 154 154 154 177 177 177 207 207 207 max amps Comp start amps 400 50 3 A 379 379 433 433 433 539 539 539 600 600 600 part winding Comp starting 400 50 3 A 186 186 211 211 211 264 264 264 307 307 307 amps star delta Oil sump heater W 150 150 150 150 150 150 150 150 150...

Page 7: ...Panel door figure 4 A compressor nameplate is located on the compressor Unit Nameplate The unit nameplate provides the following information Model number Serial number Month year Compressor quantity Fan quantity Volt Hertz phase Full load amp Max kW Auxiliary Control Starting amps Rated load amp High pressure Low pressure Refrigerant Oil Max working pressure European Community marking CE The RTRA ...

Page 8: ...ircuit to verify that the refriger ant charge is intact If it is not contact a qualified ser vice organization and the appropriate Trane sales office Pre installation Report any damage incurred during handling or installa tion to the Trane sales office immediately An installation check sheet is provided at the end of the manual Location requirements Noise considerations Locate the unit away from s...

Page 9: ...om mended for compressor service and to provide sufficient clearance for the opening of control panel doors Refer to the submittals delivered with the units for minimum clear ances In all cases local codes which require additional clearances will take precedence over these recommenda tions Note If the chiller configuration requires a variance to the clearance dimensions contact your Trane Sales Of...

Page 10: ... 1300 1300 1300 1300 1300 Height mm N A N A 2000 2000 2000 2000 2000 N A Not available Figure 7A Right side Figure 7B Left side Lifting and moving instructions A specific lifting method is recommended as follows 1 Four lifting points are built into the unit 2 Slings and spreader bar to be provided by rigger and attached to the four lifting points 3 Minimum rated lifting capacity vertical of each s...

Page 11: ...rout e Before tightening the mounting bolts level the unit using the unit base rail as a reference Water piping Thoroughly flush all water piping to the unit before mak ing the final piping connections to the unit Caution If using an acidic commercial flushing solution construct a temporary bypass around the unit to prevent damage to internal components of the evaporator Caution To avoid possible ...

Page 12: ...le drain to permit evaporator drainage during unit servicing A shutoff valve must be installed on the drain line If a drain line is not provided install the drain plug that is shipped with the unit Evaporator flow switch Chilled water flow protection is provided by the UCM CLD without the need for a chilled water flow switch A flow switch for chilled water is strictly discretionary but if not inst...

Page 13: ...nd installation procedures General guidelines for flow switch installation are outlined below 1 Mount the switch upright with a minimum of 5 pipe diameters of straight horizontal run on each side Do not install close to elbows orifices or valves Note The arrow on the switch must point in the direc tion of flow 2 To prevent switch fluttering remove all air from the water system Note The UCM CLD pro...

Page 14: ... desired This eliminates errors resulting from differently calibrated gauges installed at unmatched elevations Water pressure relief valves Install a water pressure relief valve in the evaporator inlet shutoff valve as shown in figure 8 Refer to applica ble codes for relief valve installation guidelines Caution To prevent shell damage install pressure relief valves in the evaporator water system F...

Page 15: ... can be individually ducted or each double fan can be ducted with a pants section Caution When attaching supply ductwork to con denser inlet ensure no fasteners pierce the coil Figure10 Recommended ductwork Note To avoid air recirculation through the ductwork we recommend to put backdraft dampers only on the double fan situated on the right side when facing the condensing coil for the RTRA 109 HE ...

Page 16: ... link Remote CLD Mounting All hardware tools screws etc is to be field supplied Fig ure 11 shows the remote CLD panel and the electrical access knockouts at the bottom and top of the panel Remove the knockouts that will be used for wire entry prior to mount ing the panel Note On the back of the panel is a knockout for an electrical outlet box if one is to used Prior to mounting the panel the actua...

Page 17: ...J2 2 in the Remote CLD panel The polarity of the of the power source is not a concern but the power source must be grounded to terminal J2 3 Note A field supplied 24V 40VA separation trans former with electrostatic screen must be used as a power supply for the Remote CLD If the Remote CLD share the 24V power source with other components a 24V 24V transformer will be installed before the Remote CLD...

Page 18: ...he major differ ence is that the Screw compressor unit uses helical rotary compressors an electronic expansion valve on each circuit an external oil cooling and filtration system and Trane s exclusive Adaptive Control system The basic characteristics of the Screw compressor refrig eration cycle provide these units with distinct opera tional and reliability advantages over other types of units in t...

Page 19: ...ler 11 Liquid line 13 Liquid stop valve 14 Drier filter 15 Electronic expansion valve 16 Evaporator 17 EVP refrigerant entering temperature sensor 18 EVP refrigerant leaving temperature sensor 19 Water inlet connection 20 Water outlet connection 21 Water inlet temperature sensor 22 Water outlet temperature sensor 23 Oil cooler 24 Oil line 25 Oil stop valve 26 Oil filter 27 Oil solenoid valve 29 Co...

Page 20: ...ets are provided at each end of both rotors The slide valve is located above and moves along the top of the rotors The helical rotary compressor is a positive displacement device The refrigerant from the evaporator is drawn into the suction opening at the end of the motor barrel through a suction strainer screen across the motor and into the intake of the compressor rotor section The gas is then c...

Page 21: ...es this heater during the compressor Off cycle to keep refrigerant from condensing in the com pressor The heater element is continiuously energized Oil separator The mixture oil refrigerant enters tangentially the oil separator and swirls around Thus the oil which is denser is thrown to the outside wall and flows to the bottom of the separator It then goes to the cooling cir cuit The gas exits out...

Page 22: ...tion so the unit always starts ful ly unloaded Oil filter All RTRA units are equipped with a replaceable element oil filter The filter removes any impurities that could foul the solenoid valve orifices and compressor internal oil supply galleries This also prevents excessive wear of compressor rotor and bearing surfaces Refer to the maintenance portion of this manual for recommended filter element...

Page 23: ...eat tape has been energized 9 Close the fused disconnect switch es that supplies power to the chilled water pump starter 10 Start the chilled water pump to begin circulation of the chilled water Inspect all piping for leakage and make any necessary repairs 11 With chilled water circulating through the system adjust water flow and check water pressure drop through the evaporator are conform to the ...

Page 24: ...is normal a problem other than refrigerant shortage exists Do not add refrigerant as this may result in overcharging the circuit Caution Use only refrigerants specified on the unit nameplate to prevent compressor damage and insure full system capacity If operating conditions indicate a refrigerant overcharge remove refrigerant at the liquid line service valve Allow refrigerant to escape slowly to ...

Page 25: ... to the compressor be sure that all refrigerant valves are open before starting the unit 2 Close the main disconnect and unit mounted discon nect if installed to energize the compressor sump heaters Caution The compressor sump heaters must be ener gized for a minimum of 24 hours prior to unit opera tion to prevent compressor damage caused by liquid refrigerant in the compressor at start up 3 Maint...

Page 26: ...re and record the system superheat Refer to Sys tem superheat Measure and record the system subcooling Refer to System subcooling Check fan belt tensioning Warning Position all electrical disconnects in the OPEN position and lock them to prevent injury or death due to electrical shock Annual maintenance Perform all weekly and monthly maintenance proce dures Have a qualified service technician chec...

Page 27: ...reatment firms will be able to recommend a suitable chemical for use in this system A typical configuration for chemical cleaning is shown in figure 17 The supplier of the cleaning chemicals must pro vide or approve All of the materials used in this configuration The amount of chemicals used The length of time the chemicals are used Any safety precautions and handling instructions Service pumpdown...

Page 28: ... Drop kPa l s kPa l s Fifteen Minute Intervals Unit A B Voltage A C B C Compressor 1 Amperage 2 3 Unit Operator Mode Last Diagnostic Evap water Ent C Evap water Lvg C Cond air inlet t Cond air outlet t Comp Suction C Comp Sat Evap C Comp Evap Pres Comp Sat Cond C Comp Cond Pres Comp Starts Comp Hours Comp Hours Static pressure Pa Condenser Fans On PNL PNL PNL PNL Comments Date SVC Tech Owner Start...

Page 29: ...ioning Check manometer positioning Check chilled water flow rate balancing system Check rinsing and filling of chilled water pipes Check pump operation and water flow Electrical equipment Check direction of rotation of compressors and fan motors Check installation and rating of mains power switch fuse Check that electrical connections comply with specification Check that electrical connections mat...

Page 30: ...30 Notes ...

Page 31: ...31 Notes ...

Page 32: ...ining it in perfect operating condition over a long peri od of time the constructor have at your disposal a refrigeration and air conditioning service school The principal aim of this is to give operators and maintenance technicians a better knowledge of the equipment they are using or that is under their charge Emphasis is particularly given to the importance of peri odic checks on the unit opera...

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