6 PART-SVN237B-EN
Installation
Compressor Replacement
If either a 1
st
Gen or 2
nd
Gen GP4 Classic Compressor has
failed on an RTAE Chiller, only the Locked VarVi Service
Compressor can be used as a replacement, as the Classic
chassis has been discontinued. Motor information for a
specific compressor can be obtained by checking the
model number on the compressor nameplate. Motor
number (MN) is stored in the 6
th
and 7
th
digit of the
compressor model number.
Example: Compressor model CHHSRB1A1A0 indicates a
B1 motor, which is a 100T Standard Lift 1
st
Gen GP4 Classic
motor. Refer to RTAE Service Guide (RTAE-SVG001*-EN)
for more detailed instructions for compressor
replacement procedure.
Notes:
• Piping and fitting modifications may be required.
• All units will require field installed insulation. Install
insulation before adding refrigerant for proper
adhesion.
Table 2. GP4 compressor cross-list for RTAE chiller
GP4 Screw Compressors
1
st
Gen GP4 Classic
(Phase Motion Motor)
2
nd
Gen GP4 Classic
(Regal Beloit Motor)
VarVi GP4 Service Model
(Regal Beloit Motor)
Capacity Lift Voltage MN Service# MN Service# MN Service#
100T SL
440-528V
B1
(a)
(a) Covers both 360-439V and 440-528V 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 380V/400V chillers. 440-528V motors are used on
200V/230V/460V/575V chillers.
COM11023
BA COM11539 BA COM13092
360-439V BB COM11540 BB COM13093
100T HL
440-528V
C1
(a)
COM11024
CA COM11541 CA COM13094
360-439V CB COM11542 CB COM13095
125T SL
440-528V E3 COM11027 EA COM11543 EA COM13087
125/150T SL
360-439/440-528V E2 COM11026 EB COM11544 EB COM13086
150T SL
360-439V E1 COM11029 EC COM11545 EC COM13085
150T HL
440-528V
F2
(a)
COM11031
FA COM11546 FA COM13088
360-439V FB COM11547 FB COM13089
Additional Parts Required
Note: Must be ordered separately.
Important: On
ly the compressor is delivered as
standard. Additional parts will be required
and must be ordered separately.
Follow steps below to identify
additiona
l parts required:
1. Record the model number, digit 5 (R or S) from the
RTAE n
ameplate located on the unit.
2. Record the model number, digi
t 7 (number or letter)
from the motor nameplate located on the compressor
motor.
3. Determine which circuit needs the replacement
compressor
(circuit #1 or
#2).
4. Determine which additional parts need to be ordered
from
the list below using the above information and
purchase them for the GP4 Classic compressor
replacement.
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