Haier AD88NAHAAA Operation And Instruction Manual

To the unitTo 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)Solder jointSolder jointTightlyclosedIndoor unitIndoor OutdoorAccess holeSolder joint TightlyclosedTightlyclosed Access holeOutdoor unit(Liquid side)three-way valveField tubeinstallationField tubeinstallationPINSTALLATION MANUAL FOR OUTDOOR UNIT36Step 1:Charge for more than 3 minutes under 0.3MPa(3.0kg/cm2g)Step 2:Charge for more than 3 minutes under 1.5MPa(15kg/cm2g)-----------Serious leakage may be found.Step 3:Charge for more than 24 hours under 3.0MPa(3.0kg/cm2g)----------Small leakage may be found.Check for pressure decreaseWithout pressure decrease-PassWith pressure decrease-Check for leaage.There will be a 0.01MPa(0.1kg/cm2g) pressure change for every 1 C ambient temperature changeduring 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 or soapsudsfor 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 in the figurebelow.The vacuum pumping must be done from both the liquid and gas inlets.Check for leakageVacuum Pumping

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