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Stealth™ Model RTAE Chillers 

Field Replacement of GP4 Classic 
Compressor

Installation Instructions

April 2022

PART-SVN237B-EN

SAFETY WARNING

Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of 
heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and training. 
Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury. 
When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are 
attached to the equipment.

Summary of Contents for Stealth RTAE

Page 1: ...stallation starting up and servicing of heating ventilating and air conditioning equipment can be hazardous and requires specific knowledge and training Improperly installed adjusted or altered equipm...

Page 2: ...t that is used in these service procedures In addition some states or municipalities may have additional requirements that must also be adhered to for responsible management of refrigerants Know the a...

Page 3: ...ions Introduction PART SVN237B EN 3 Copyright This document and the information in it are the property of Trane and may not be used or reproduced in whole or in part without written permission Trane r...

Page 4: ...uired 6 GP4 Classic Compressor Parts List 7 Heater Information 8 Compressor Heaters 8 Removal of Output Inductors 1st Gen GP4 Classic Compressor Only 9 Adding Common Mode Chokes 1st Gen GP4 Classic Co...

Page 5: ...eration motor Regal Beloit instead of Phase Motion Removal of external inductors if installed Replacement of a 2nd Gen GP4 Classic Compressor requires replacement of the compressor motor terminal box...

Page 6: ...voltage range s Voltage specific replacement compressor for 360 439V or 440 528V depends on chiller rated voltage Refer to chiller nameplate to identify the rated voltage 360 439V motors are used on...

Page 7: ...red If the unit in the field includes the sound attenuation option then the appropriate kit must be ordered for the new GP4 VarVi frame size Two parts are required for the specific compressor frame si...

Page 8: ...d locally 6 Inline connectors With removal of the output inductor the power conductors will be need to be spliced together Polaris Electrical Connectors are recommended Catalog No IT 250 Six 6 pieces...

Page 9: ...tor See Step 6 Figure 3 Electrical schematic with output inductor circuit1 401A 404A 28A 28A 27A 26A 25A 20A 19A 21A 1R3 U1 U2 1R3 V1 V2 1R3 W1 W2 3M1 M T1 T2 T3 BLK BLK 402A 403A 1X3 10 1B3 1 2 430A...

Page 10: ...24B 411B 411A 424C 4B2 P 1XJ44 1 1XJ44 2 1XP44 1 1XP44 2 1X3 14 424D 1T2 U V W R1 R2 S1 S2 T1 T2 G CON 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 CON 3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 CON 7 1 2 3...

Page 11: ...8 1M5 1R3 1B3 1T1 1F1 1F38 1F33 1F34 1T2 B B 1T11 1T12 1T13 1T10 1T14 1T15 1K15 1K6 1K3 1K2 1K8 1K5 1K4 1K9 1K13 1K12 1X4 1XJ3 1K10 1K17 1K18 1K19 1K22 Output Inductor location Output Inductor locatio...

Page 12: ...ing 3 Way Modulating Valve UC800 Temp Sensor Expansion Tank Active ID BP Bypass Valve BP Brazed Plate Heat Exchanger ID AFD IGBT Diodes Heat Exchanger Figure 7 Insulated in line connectors Installatio...

Page 13: ...conductors Refer to the schematic and image below With removal of the output inductor the power conductors will be need to be spliced together Polaris electrical connectors are recommended Catalog No...

Page 14: ...y Table 8 Programming values for AFD3 drive AFD3 Parameter Name FCAT GP4 Gen Replacing GP4 VarVi Service Model Number a FA EA EB b CA BA EB b FC FB EC FD CB BB Motor Type MTPx Internal Permanent Magne...

Page 15: ...mation is stored in the 6th and 7th digit of the model number For example the digits in bold of this model number correspond to the information in the tables above CHHSRB1A1A0 b Motor model EB is uniq...

Page 16: ...Figure 12 Cartridge heater location Cartridge heater location Band heater can be reused Figure 13 Band heater location Band heater location Installation 16 PART SVN237B EN...

Page 17: ...e switch location Location of high pressure switch Reuse fitting from old compressor Figure 15 Intermediate oil pressure transducer location Location of intermediate oil pressure transducer Installati...

Page 18: ...Figure 16 Solenoid stems Leave solenoid stems capped Figure 17 Piping modifications Installation 18 PART SVN237B EN...

Page 19: ...Figure 18 Fitting installation for suction transducer in the suction line Figure 19 Threadelet installation 1 4 inch pipe thread Installation PART SVN237B EN 19...

Page 20: ...Figure 20 Follow standard welding procedures when welding 1 4 inch pipe thread threadelet in place Figure 21 Pressure teat and paint threadelet Installation 20 PART SVN237B EN...

Page 21: ...Figure 22 Install existing suction transducer Installation PART SVN237B EN 21...

Page 22: ...Notes 22 PART SVN237B EN...

Page 23: ...Notes PART SVN237B EN 23...

Page 24: ...re committed to using environmentally conscious print practices Trane by Trane Technologies NYSE TT a global climate innovator creates comfortable energy efficient indoor environments for commercial a...

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