Valve Motor Replacement - Carrier AquaSnap 30RAP011-060 Controls, Start-Up, Operation, Service, And Troubleshooting

Fig. 41 — 30RAP010-060 EXV Cable Connections
to EXV Module
Fig. 42 — 30RAP070-150 EXV Cable Connections
to EXV Module

VALVE MOTOR REPLACEMENT

Sizes 025, 030, and 050-060
IMPORTANT: Obtain replacement gasket before opening EXV.
Do not re-use gaskets.
Perform the following procedure to replace the EXV motor:
1. Be sure the refrigerant has been recovered from the circuit.
2. Remove power from the EXV board.
3. Refer to Fig. 43 and remove the EXV retainer clip, taking
care not to damage the clip as it will be required for installa-
tion later.
4. Using a wrench and back-up wrench, remove the motor
assembly from the EXV body by placing the back-up wrench
on the valve body.
5. To install the motor, be sure to use a new gasket. Connect the
EXV cable to the EXV motor assembly.
6. Use Service Test as described on page 40 to open the EXV to
100%. This will retract the piston fully. Remove power from
the EXV board prior to removing the EXV cable. Remove
the EXV cable from the motor prior to installation. For 025,
030, 050-060 sizes, replacement motors are shipped in the
BLK
WHT
GRN
RED
BLK
WHT
GRN
RED
a30-4972
WHT
BRN
BLK
BLU
WHT
BRN
BLK
BLU
retracted position and may be installed as received; therefore,
this step may be skipped if installing a new motor.
If the existing motor has been removed for inspection or clean-
ing, be sure that the piston is fully retracted into the motor
assembly before installation on the valve. Failure to do so will
permanently damage the drive and motor. Replacement motor
assemblies are shipped in the retracted position and may be
installed as received.
7. Lightly oil the threads and gasket on the new motor. Carefully
seat the motor on the valve body. Using a wrench and back-
up wrench as described above, tighten the motor assembly as
follows: one eighth turn more than hand tight is sufficient to
achieve a leak proof seal.
8. After the motor is tightened, the cable should be replaced on
the valve. Care should be taken to ensure engagement of the
alignment key. Install the EXV cable retainer clip (see
Fig. 43).
9. Pressurize the system and check for leaks.
10. Reapply control power and test the operation using Service
Test.
Sizes 070-150
IMPORTANT: Obtain replacement gasket before opening EXV.
Do not re-use gaskets.
Perform the following procedure to replace the EXV motor:
1. Be sure the refrigerant has been recovered from the circuit.
2. On sizes 070-150, use Service Test as described on page
40 to open the EXV to 100%. This will retract the piston
fully.
3. Remove power from the EXV board and then disconnect
the EXV cable from the EXV.
4. Using a wrench and back-up wrench, remove the motor
assembly from the EXV body. Be sure to place the back-
up wrench on the adapter to remove the motor as shown in
Fig. 44.
5. To install the motor, be sure to use a new gasket.
6. Manually depress the valve piston before installing the
motor assembly. This will allow for the lead screw to
engage the piston as the motor is installed.
7. Lightly oil the threads and gasket on the new motor. Care-
fully seat the motor on the valve body. Using a wrench and
back-up wrench as described above, tighten the motor
assembly as follows: Tighten the motor to 36 ft-lb
(50 N m) and then tighten an additional 30 degrees as

indicated in Fig. 44.
8. After tightening the motor, replace the cable on the valve.
Care should be taken to ensure engagement of the align-
ment key. Pressurize the system and check for leaks.
9. Reapply control power and test the operation using Ser-
vice Test.
56
CAUTION