Vilter Manufacturing Compressor Unit VSS401

Ensure all required parts are available

Select the type of heater cartridge

Remove heater cartridge from thermowell

Heater Cartridges with Turck connectors

Compressor Shaft Bearing Clearance Inspections

Check that all necessary tools and equipment are in place

Ensure force applied does not exceed 300 to 500 lbs at point of contact

Determine Maximum Applied Force

Main Rotor Bearing Axial Clearance Inspection

Remove center member as per Drive Coupling Replacement procedure

Install and zero dial indicator on compressor frame

Record measurement after pushing coupling towards motor

Record measurement after pushing input shaft towards compressor

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

Wear rubber gloves and a face shield when working with condensate or oil.

Use appropriate lifting devices and additional personnel for lifting heavy components.

Install lifting eyes on oil separator manhole cover, if required.

Secure appropriate lifting device to oil separator manhole cover.

Remove all bolts except top four bolts securing oil separator manhole cover to oil separator vessel.

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

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 each time filter cartridge is replaced

Check compressor sound for abnormal noises

Check shaft seals for excessive oil leakage

Is the oil leakage within the normal range of 6 to 15 drops per hour?