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Discussion Starter · #1 ·
Liquid Line Solenoid - Pump Down

Through out the years , I have come into contact with commercial split systems with a Liquid Line Solenoid .

The controls activated the solenoid , when the thermostat ( or Building Automation System ) was satisfied .

The compressor started to pump down and , best I remember , the compressor shut down on low suction pressure ?

That is the reason this method is used , rather than simply have the ASA turn off the compressor contactor ?

Thanks ,
God bless
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