Refrigerant Piping; Pressure Relief Valves - McQuay SWP 018 Installation And Maintenance Manual

Refrigerant Piping

Pressure Relief Valves

All units have individual condensers per refrigerant circuit
and each condenser is provided with a spring loaded relief
valve. The valve is set to open when refrigerant pressure
reaches 400 psig. The relief valve will accommodate a 1/2"
IM708
flare connection for applications where it is necessary to
connect vent piping and run it outside the building.
CAUTION
When refrigerant is vented to the outside of the building,
the vent piping should be installed as recommended in
ASHRAE Standard 15-1994.
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