Accumulator

The sealed accumulator connects to the evaporator outlet pipe. The sealed accumulator functions as a liquid/vapor separator that receives the following:
^ The refrigerant vapor
^ Some liquid refrigerant
^ The refrigerant oil from the evaporator

The sealed accumulator only allows the refrigerant vapor and the refrigerant oil to flow to the compressor. At the bottom of the accumulator is a desiccant that acts as a drying agent for moisture that may enter the system. An oil bleed hole, located near the bottom of the accumulator outlet pipe, provides an oil return path to the compressor.

A low-side pressure service fitting is located on the accumulator. A similar service fitting is provided for mounting the cycling pressure switch. Do not discharge the system when replacing the switch. Service the accumulator only as a replacement.