Reciprocating compressor.

It is important to know when not to turn on the reciprocating compressor.

If your system has been shut down for a long period of time .

You are going to start it up again.

Do not energize the reciprocating compressor .

Until the condenser water temperature reaches 45°F or warmer.

This will help prevent damage that can result from liquid refrigerant contacting a cold surface.

Directly by varying the speed or by methods designed to allow direct discharge of vapor from a cylinder.

To the low pressure or suction side during the so-called compression stroke.

The capacity control method are:

• This control method uses an external bypass around the compressor to recycle gas from the compressor discharge to the inlet.
• Or to the atmosphere in the case of an air compressor.

The take-off point for the bypass must be downstream of a heat exchanger .

If there is no exchanger in the discharge, the bypass must branch into the suction line upstream of an exchanger.

• A cooler may be placed in the bypass line.