QX4 2WD V6-3.5L (VQ35DE) (2003)
High Pressure Safety Valve HVAC: Description and Operation
Refrigerant Flow
Pressure Relief Valve
The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compressor. When the pressure of refrigerant in the
system increases to an abnormal level [more than 3,727 kPa (38 kg/sq.cm, 540 psi)], the release port on the pressure relief valve automatically opens
and releases refrigerant into the atmosphere.