Panasonic CU-5E36QBU-5 Service Manual

Also see for CU-5E36QBU-5: Operating instructions

36CUTTING AND FLARING THE PIPING1. Please cut using pipe cutter and then remove the burrs.2. Remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused.Turn the piping end down to avoid the metal powder entering the pipe.3. Please make flare after inserting the flare nut onto the copper pipes.10.4 Evacuation Of The EquipmentWHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT ANDPIPES in the following procedure.1. Connect a charging hose with a push pin tothe Low side of a charging set and the serviceport of the gas side 3-way valve.2. Connect the micron gauge between vacuumpump and service port of outdoor units.3. Turn on the power switch of the vacuum pumpand make sure that connect digital microngauge and to pull down to a value of 500microns.4. To make sure micron gauge a value 500microns and close the low side valve of thecharging set and turn off the vacuum pump.5. Disconnect the vacuum pump house from theservice port of the 3-way valve.6. Tighten the service port caps of gas side3-way valve at a torque of 13.3 Ibf.ft (18 N•m)with a torque wrench.7. Remove the valve caps of both of the 2-wayvalve and 3-way valve. Position both of thevalves to “Open” using a hexagonal wrench(5/32" (4 mm)).8. Mount valve caps onto the 2-way valve and3-way valve.o Be sure to check for gas leakage.CAUTION If micron gauge value does not descend 500 microns, take the following measures:- If the leak stops when the piping connections are tightened further, continue working from step .- If the leak does not stop when the connections are retightened, repair location of leak.- Do not release refrigerant during piping work for installation and reinstallation.- Take care of the liquid refrigerant, it may cause frostbite.