High Pressure Safety Valve HVAC: Description and Operation

The Compressor is equipped with a pressure relief valve which is placed in the system as a mechanical safety device. Under certain conditions, refrigerant pressure on the compressor discharge side may exceed the designed operating level. To prevent system damage, the valve is designed to open automatically at approximately 3654 ± 483 kPa (530 ± 69 psi) and vent refrigerant to the atmosphere. Any condition that causes this valve to open should be corrected, and the refrigerant oil and refrigerant should be replaced as necessary.