Emerson VSR, VSM, VSS service manual Service, Installation Of The Compressor

Service

INSTALLATION OF THE COMPRESSOR

A)After the work has been completed, reinstall the compressor on the base or C-flange adapter (dependent upon compressor model).

B)On the units, replace the shims under the com- pressor feet. Check for a soft foot. This is ac- complished by tightening down three of the hold down bolts and checking the clearance under the fourth compressor foot. If there is clearance, add the appropriate amount of shims. Tighten down the fourth bolt and loosen either adjacent bolt and check again for clearance, adding shims ac- cordingly. Align the compressor and motor.

On compressors the discharge elbow should be tightened on the separator first, before the compressor manifold flange is tightened. This should be done to prevent compressor to motor misalignment.

Replace all electrical, gas and oil connections removed when servicing the compressor.

LEAK CHECKING UNIT

Note: Unit can be leak checked before evacuation.

CAUTION

Slowly pressurize the unit from the discharge side of the compressor. Pressurizing the compressor from the suc- tion side may cause rotation of the compressor without oil supply, which could lead to internal damage.

A)Use a vacuum pump to evacuate the unit.

B)Break the vacuum on the unit using dry nitrogen and check for leaks. Concentrate on areas where work was done.

C)If no leaks are found, the unit can be returned to service.

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