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valve is not energized. For this reason, an electrical power failure does not lead to any problems
with the refrigeration system.
The primary purpose of a solenoid valve in a refrigerant liquid line is to helps prevent refrigerant
migration (i.e., flow into the evaporator) during the OFF cycle.
NOTE:
Charging to a full liquid line sight glass should never be the sole
means of determining the correct refrigerant charge. Other parameters
such as superheat, suction pressure, head pressure, sub-cooling and
ambient temperature are also important. A system charged to a clear sight
glass is often overcharged.
7.9.
Low Ambient Receiver Package
Figure 15 Typical Low Ambient Receiver Package
7.9.1. Refrigerant Receiver
The function of a Liquid Refrigerant Receiver is to store liquid refrigerant to provide continuous
flow of liquid refrigerant to the expansion device and to provide storage for the refrigerant charge
during system service or maintenance.
A receiver is required to store refrigerant during warmer weather. The receiver should be sized
so it is at 80-82% of capacity while containing the entire system charge. Another aspect of