Vilter Manufacturing Compressor Unit VSS901

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 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.

Check the refrigeration system for leaks with a suitable leak detector

Enter the oil pressure readings

Review the microprocessor log and log sheets

Check refrigerant levels in vessels

Have all valves that may trap liquids been opened?

Has the local lock-out/tag-out procedure been followed?

Is the compressor depressurized?

Shut down the compressor unit as per 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.

Removal of Type C Sure-Flex Coupling

Compressor Shaft Bearing Clearance Inspections

Check that all tools and safety equipment are in place

Ensure force applied does not exceed 300 to 500 lbs

Record maximum applied force calculation

Main Rotor Bearing Axial Clearance Inspection

Install and zero dial indicator on compressor frame

Record measurement when pushing coupling towards motor

Record measurement when pushing input shaft towards compressor

Verify components of the shaft seal

Remove bolts (281) securing shaft seal housing (218) to compressor

Insert two bolts (281) into threaded jacking holes to assist in removing shaft seal housing (218)

Remove mating ring (219C) from compressor shaft

Remove oil seal (230) from shaft seal housing (218)

Tap out cup assembly (219B) from the back side of shaft seal housing (218) using a brass drift and hammer