Product data

LOW-PRESSURE SWITCH
This switch, mounted on the vapor return line, has fixed non-adjustable settings. To check pressure switch, attach pressure
gage to vapor return line service valve gage port. Slowly close liquid shutoff valve and allow compressor to pump down.
Do not allow compressor to pump down below 2 psig. Compressor should shut down when suction pressure drops to about
7 psig, and should restart when pressure builds up to about 22 psig after CLO has been reset and time-delay device has
completed its timing cycle.
NOTE: If pressure switch needs to be replaced, there is a Schrader valve located under the switch so that system will not
need to be evacuated.
SERVICE VALVES
The service valves in the outdoor unit are front seated at the factory. This means the refrigerant charge is isolated from the
line-set connection ports. To prevent damage to the valve, use a wet cloth or other accepted heat sink material on the valve
before brazing. The service valves must be back seated (turned counter-clockwise until seated) before the service port caps
are removed and the hoses of gage manifold connected. In this position, refrigerant has access from and through outdoor
and indoor unit. The service valve cannot be field repaired; only a complete valve or valve stem seal and service port caps
are available for replacement.
NOTE: Do not open service valves, which are not connected to a tubing set. Be sure any inactive circuits are capped off. (MORE)