High Pressure Safety Valve HVAC: Testing and Inspection

The high-pressure relief valve is a safety feature which releases part of the refrigerant inside the system into the atmosphere when the high, pressure level exceeds 3,740 kPa (532 psi) during air conditioning operation.
Once the pressure inside the system has been reduced to 2,940 kPa (41 8 psi) or lower, the high-pressure relief valve closes, thus allowing continued operation.
1. If a leak is detected at section A, replace the high-pressure relief valve.
The valve can be used unless there is a leak from that section.
2. If a leak is detected at section B, retighten the valve. If the leak persists after retightening the valve, replace the packing.