Gauge Installation and Removal Procedures By: Inmer Amaya

Tools Needed Gauge Manifold Reversible Ratcheting Refrigeration Wrench

Step #1 Preparing Gauge Manifold for Installation  Disconnect hoses from blank ports of gauge manifold. They are located on back side of the gauges.  Inspect gauges to ensure calibration and calibrate if needed.

Step #2 Preparing High side of Gauge manifold  Remove service valve cap from liquid line service valve  By using ratchet wrench make sure valve is back seated  Remove service port cap from liquid line service valve  Once service port cap is removed place on blank port of gauge manifold  Connect high side hose from gauge manifold to the service port on the liquid line service valve

Step #3 Preparing Low side of Gauge Manifold  Remove service valve cap from suction line service valve  By using ratchet wrench make sure valve is back seated  Remove service port cap from suction line service valve  Once service port cap is removed place on blank port of gauge manifold  Connect low side hose from gauge manifold to the service port on the suction line service valve

Step # 4 Releasing high side pressure  Crack the liquid line service valve off the backseat  Replace the service valve cap on the liquid line service valve  Open the high side valve on the gauge manifold  Open the low side valve on the gauge manifold

Step # 5 Purging air from hoses and combining pressures  Loosen the hose connection on the suction service valve (1-2 seconds) to purge air from hoses and manifold then tighten the hose connection back  Loosen the center hose connection on the blank port of the manifold to purge air  Close the high side and low side valves on the gauge manifold  Crack the suction service valve off the back seat  Replace service valve cap on the suction service valve

Step # 6 Uninstalling the Gauge Manifold  Remove service valve cap from liquid line service valve  Backseat the liquid line service valve  Open high and low side valves on the gauge manifold. Allow pressures to equalize.  Close the high and low side valves on gauge manifold.  Remove service valve cap from suction line service valve.  Backseat the suction line service valve

Step # 7 Removing hoses from system  Remove high side hose from the liquid line service valve  Remove the service port cap from the high side blank port of the gauge manifold and place it on the liquid line service valve  Connect the high side hose to blank port of gauge manifold  Remove the low side hose from the suction line service valve  Remove the service port cap from the low side blank port of the gauge manifold and place it on the suction line service valve  Connect the low side hose to blank port of gauge manifold

Step # 7 Continued  Replace the service valve cap on the liquid line service valve  Replace the service valve cap on the suction line service valve

Works Cited  (2010). 3/4" Suction Line Service Valve (Sweat) YORK [Web Drawing]. Retrieved from 2/merchant.mvc?Screen=PROD&Product_Code=SRVY347 65&Category_Code=ServiceValves 2/merchant.mvc?Screen=PROD&Product_Code=SRVY347 65&Category_Code=ServiceValves  Whitman, B., Johnson, B., Tomczyk, J., & Silberstein, E. (2012). Refrigeration and air conditioning technology. (7th ed.). New York: Cengage Learning