Haier 4HP16 Installation Instructions Manual

507919-01Page 8 of 21Issue 1946WHEN BRAZING LINE SET TOSERVICE VALVES, POINT FLAMEAWAY FROM SERVICE VALVE.LIQUID LINE SERVICE VALVELIQUID LINEBRAZE LINE SETWrap both service valves with water-saturated cloths as illustrated here and as mentioned in step 4, before brazing to line set.Cloths must remain water-saturated throughout the brazing and cool-down process.WATER-SATURATEDCLOTHIMPORTANT — Allow braze joint to cool. Applyadditional water-saturated cloths to help cool brazedjoint. Do not remove water-saturated cloths untilpiping has cooled. Temperatures above 250ºF willdamage valve seals.6VAPOR LINEWATER-SATURATEDCLOTHVAPOR LINESERVICE VALVEAfter all connections have been brazed, disconnect manifold gauge set from service ports. Apply additional water-saturated cloths to bothservices valves to cool piping. Once piping is cool, remove all water-saturated cloths.WHEN BRAZING LINE SET TOSERVICE VALVES, POINT FLAMEAWAY FROM SERVICE VALVE.PREPARATION FOR NEXT STEP7WRAP SERVICE VALVESTo help protect service valve seals during brazing, wrap water-saturated cloths around service valve bodies and copper tube stubs. Useadditional water-saturated cloths underneath the valve body to protect the base paint.4 FLOW NITROGENFlow regulated nitrogen (at 1 to 2 psig) through the refrigeration gauge set into the valve stem port connection on the liquid service valve andout of the vapor valve stem port. See steps 3A, 3B and 3C on manifold gauge set connections.5WARNINGFIRE, PERSONAL INJURY, OR PROPERTY DAMAGEmay result if you do not wrap a water-saturated cloth aroundboth liquid and suction line service valve bodies and coppertube stub while brazing the line set! The braze, whencomplete, must be quenched with water to absorb anyresidual heat.Do not open service valves until refrigerant lines andindoor coil have been leak-tested and evacuated. Referto Leak Test and Evacuation section of this manual.WARNINGWhile protecting theservice valve seals withwater-saturated cloths,ensure that water doesNOT enter the system.