Liquid Line Subcooling Charge Check
Calculate subcooling to verify TXV refrigerant charge. Prevent vapor bubbles from entering the expansion valve.
Technical Engineering Guide & Field Diagnostic Practices
Subcooling measures how much liquid refrigerant cools below its saturation condensing temperature before reaching the expansion valve. Subcooling ensures pure solid liquid enters the metering device, preventing vapor flash bubbles that cause erratic expansion valve hunting and lost cooling capacity.
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