Installing Manifold Gauge Set

If an A/C system problem still exists after you have completed the preliminary checks, more diagnostic tests must follow. These include manifold gauge set readings. Follow the steps listed below for installing a manifold gauge set.

CAUTION:
^ ALWAYS WEAR GOGGLES AND WRAP A CLEAN CLOTH AROUND FITTINGS, VALVES, AND CONNECTIONS WHEN PERFORMING WORK THAT INVOLVES OPENING THE REFRIGERANT SYSTEM.
^ ALSO, BEWARE OF THE DANGER OF CARBON MONOXIDE FUMES BY RUNNING THE ENGINE IN CLOSED OR IMPROPERLY VENTILATED GARAGES.




IMPORTANT: Check to make sure gauges read zero before installing manifold gauge set.




1. Close both hand valves of manifold gauge set.
(1) Low side gauge
(2) High side gauge
2. Connect the low pressure (blue) gauge hose to the suction service port located on the suction pipe. Pull valve assembly collar up, place valve assembly over service port and release collar.
3. Open service valve.




4. Connect the high pressure (red) gauge hose to the discharge service port located on the discharge pipe. Pull valve assembly collar up, place valve assembly over service port and release collar.
5. Open service valve.