Patent ID: 6996998

Claim:
A refrigerant system comprising: a compressor in fluid communication with a condenser that is in fluid communication with an expansion device that is in fluid communication with an evaporator that is in fluid communication with the compressor, the condenser, expansion device, evaporator and compressor cooperating to selectively alter a temperature of a fluid external to the system, one side of the compressor being a low pressure side of the system; a refrigerant receptacle; and a pressure relief device that couples the receptacle to the system to automatically allow refrigerant from the system to flow into the refrigerant receptacle if pressure in the system exceeds a selected threshold for the low pressure side, the pressure relief device including an access valve coupled with the refrigerant receptacle for at least one of selectively reclaiming refrigerant from the receptacle, adding refrigerant to the receptacle, or pulling vacuum on the receptacle, the pressure relief device also including a directional valve between the access valve and the system that allows refrigerant flow only from the system toward the receptacle.