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Section 5 • Maintenance/Service
Slide Valve Actuator Assembly
Replacement
To replace slide valve actuator assembly, proceed with
the following steps:
Removal
WARNING
At shutdown, open any other valves that may trap
liquids to prevent serious injury and/or damage to
equipment.
WARNING
Follow local lock-out/tag-out procedure. Compressors
must be depressurized before attempting to do any
work on them. Failure to comply may result in serious
injury, death and/or damage to equipment.
This procedure is applicable to both capacity and
volume slide valve actuator assemblies.
1.
Shut down the compressor unit, refer to Stopping/
Restarting procedure in Section 4.
2.
Turn disconnect switches to the OFF position for
the compressor unit and oil pump motor starter, if
equipped.
3.
Allow compressor, motor and surrounding compo-
nents to cool prior to servicing.
4.
Disconnect connectors from actuator.
Note orientation of components to aid in installation.
5.
First remove E-clips, then remove Locking
Retainers, next loosen and remove Grooved Bolts
and Washes that securing actuator assembly to ac-
tuator mount. See Figure 5-48 for parts details.
6.
Remove actuator assembly from actuator mount.
VSS/VSR/VSM/VSH/VSSH Compressor • Installation, Operation and Service Manual • Emerson • 35391S
NOTE
NOTE
Installation
CAUTION
When installing the slide valve actuator assembly,
loosen locking collar down the shaft. Do not use a
screwdriver to pry locking collar into position.
7.
Position actuator assembly on mount as noted in
removal.
8.
Install washers and grooved bolts to secure ac-
tuator assembly to actuator mount, torque them
to 6 lb-ft. Then install locking retainers. Last push
E-clips into grooved bolt heads. Refer to Actuator
Installation Using Anti-Rotation Bolts (see next
page) for details.
9.
Tighten screws, see Appendix A.
CAUTION
If installing new actuator, do not connect connectors
of power cable or position transmitter cable to new
actuator once installed. Connecting connectors to
new actuator will occur during calibration procedure.
Failure to comply may result in damage to equipment.
10. Leave connectors disconnected to actuator
assembly.
11. Calibrate actuator assembly, see Slide Valve
Calibration procedure in Section 4 or Appendix F.
5 – 41
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