High Pressure Safety Valve HVAC: Description and Operation
High-Pressure Relief Valve
The compressor has a pressure relief valve that opens and allows refrigerant to vent off to the atmosphere when high side pressure exceeds 3,620 + 571 kPa (525 + 75 psi.). This is done to prevent system damage. Any condition that causes this valve to open should be corrected and the refrigerant oil and refrigerant should be replaced as necessary. Refer to Refrigerant Oil Distribution.