Vilter Manufacturing Compressor Unit VSS128

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 (6 to 15 drops per hour)?

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

Review the microprocessor log and log sheets

Check refrigerant levels in vessels

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.

Shut down and isolate compressor unit

Remove components securing the command shaft assembly

Remove the command shaft and mounting plate from the compressor

Install a new o-ring (446) into the groove on the compressor discharge manifold

Use clean compressor lubricating oil on the o-ring

Install the command shaft onto the compressor discharge manifold