Haier AU84NXTBAA Installation Manual

Also see for AU84NXTBAA: Service manual

Contents

TightlyclosedInstallation of the outdoor unitTo the unit To the unit(Gas side)three-way valve(Gas side )access holeDetailed diagram of thethree-way valveTo the gaugedistributor(Liquid side)access holeThree-way valve fully closedliquid side6.4 Copper pipeVacuum pumpGauge distributorHigh-pressuregaugeLow-pressuregaugeThree-way valve fullyclosed(gas side)Welding jointTightlyclosedIndoor unitIndoor OutdoorAccess holeWelding joint TightlyclosedTightlyclosed Access holeOutdoor unit(Liquid side)three-way valveField tubeinstallationField tubeinstallationPStep 1:Charge for more than 3 minutes under 0.3MPa(3.0kgf/cm2)Step 2:Charge for more than 3 minutes under 1.5MPa(15kgf/cm2)-----------Serious leakage may be found.Step 3:Charge for more than 24 hours under 3.0MPa(3.0kgf/cm2)----------Small leakage may be found.Check for pressure decreaseWithout pressure decrease-PassWith pressure decrease-Check for leaage.There will be a 0.01MPa(0.1kgf/cm2) pressure change for every 1 C ambient temperaturechange during the 24-hour pressure charge.It should be corrected during the test.In the case of pressure decrease during steps 1 to 3 ,check the joints with the ear,hand orsoapsuds for leakage.Repair it by welding or tighten the connecting nut up.Use vacuum pump to evacuate the air. Never use the refrigerant for the evacuation.Drain off the nitrogen gas after the leak test and then connect the vacuum pump as shown inthe figure below.The vacuum pumping must be done from both the liquid and gas inlets.Check for leakageVacuum Pumping