RAM 2500 Truck 4WD V10-8.0L VIN W (1997)
High Pressure Safety Valve HVAC: Description and Operation
HIGH PRESSURE RELIEF VALVE
The high pressure relief valve is located on the compressor manifold. The valve is used to prevent excessive system pressure. The valve vents the
system when a pressure of 3445 to 4135 kPa (500 to 600 psi) and above, is reached. This prevents damage to the compressor and other system
components due to condenser air flow being restricted or an overcharge of refrigerant. The valve closes with a minimum pressure of 2756 kPa
(400 psi).
The high pressure relief valve vents only enough refrigerant to reduce system pressure, then re-seats itself' The majority of the refrigerant is
conserved in the system. If the valve vents refrigerant, it does not mean the valve is faulty The valve is only serviced as part of the compressor
assembly, and must not be removed or otherwise disturbed.
