How to Measure Subcooling

Name: Prime Cool
Address: Wagholi-Shirur Corridor, Pune, Maharashtra, 412207, IN
Telephone: +917507408461
Price range: $$

Subcooling is measured on systems with Thermal Expansion Valves (TXV) to check if the liquid line is packed with solid liquid refrigerant.

Formula & Method

Subcooling = Saturated Liquid Temp (PT Conversion) - Liquid Line Temp

Connect manifold gauge to liquid line service port to read discharge pressure.
Convert the pressure reading to saturated temperature using a PT chart.
Attach a pipe clamp thermocouple to the liquid line near the service port to read liquid line temperature.
Subtract the line temperature from the saturated temperature. Target is typically 10°F to 14°F.

Need professional assistance?

Saurav Temgire (Lead Engineer at Prime Cool) coordinates rapid-response HVAC, Chiller, and Cold Storage maintenance along the Wagholi–Shirur corridor. Call +917507408461 to schedule a visit.