Vilter Manufacturing Compressor Unit VSS361

Ensure safety precautions are followed

Shut down the compressor unit, refer to Stopping/Restarting procedure in Section 4

Turn disconnect switches to the OFF position for the compressor unit and oil pump motor starter, if equipped

Allow compressor, motor and surrounding components to cool prior to servicing

Disconnect connectors from actuator

Note orientation of components to aid in installation

Remove E-clips, Locking Retainers, Grooved Bolts and Washes securing actuator assembly to actuator mount

Remove actuator assembly from actuator mount

NOTE: Coupling guards may differ slightly but this replacement procedure can be used to remove and install them. The coupling guard assembly described in this procedure is VPN A27435C.

WARNING: The design, construction, mounting and opening of coupling guards should be performed following proper local codes. Failure to comply may result in serious injury or death.

Shut down compressor unit, see Compressor Unit Isolation for Maintenance/Service procedure.

Remove eight screws and flat washers securing upper guard to lower guard.

Remove three screws and flat washers securing upper guard to ring mounting guard. Remove upper guard.

Remove two screws and flat washers securing lower guard to ring mounting guard. Remove lower guard.

Remove eight fasteners from lower guard.

Check all pressure and temperature readings

Check micronic oil filter inlet and outlet pressures for excessive pressure drop

Is the pressure drop across the micronic oil filter greater than 45 psi?

Clean strainers when filter cartridge is replaced

Check compressor sound for abnormal noises

Check shaft seals for excessive oil leakage

Check entire system thoroughly for leaks

Grease valve stems and threads for the valve caps

Flush out sediment from water circuits

Ensure adequate ventilation and refrigerant vapor detectors are in place as per ASHRAE standards.

Wear rubber gloves and a face shield to avoid skin contact with oil.

Shut down the compressor unit as per the Stopping/Restarting procedure in Section 4.

Isolate the compressor unit as per the Compressor Unit Isolation procedure.

Drain Oil From Isolated Oil Line

Close oil supply valve and oil filter outlet valve.

Remove plug from drain valve on oil pump strainer.