Haier AD88NAHAAA Operation And Instruction Manual

INSTALLATION MANUAL FOR OUTDOOR UNITUse a vacuum pump with high degree of vacuum(below-755mmHg) and large volumedisplacement (above 40L/min)The pumping time depends on the length of the connecting pipe.Generally,it takes about 2-3hours.Make sure that the Y-shaped valves on both the gas and liquid sides are closed beforepumping.If the vacuum can no reach-755mmHg within 2 hours,continue pumping for another 1 hour.If the vacuum can no reach-755mmHg after more than 2 hour's pumping,close the valves VLand VH on the gauge distributor and stop pumping.One hour later,check the vacuum again.Ifthe vacuum has changed,it means there is a leakage.Repair it.After the above steps,replace the vacuum pump with the refrigerant pump and refill refrigerant.37After finished vacuum the system ,change the vacuum to the refrigerant pump.,charging therefrigerant .Calculation of the the refrigerant chargeNote:when the unit shipping out of the factory ,charge the refrigerant not including theconstruction procedure charged parts.The calculation of the refrigerant charging:When the connection pipe (L) <=5 meters ,not need to add refrigerant ;If the connection pipe(L)>5 meters,we need recharge the 115g refrigerant per add 1 meter.That is :the quantity of refrigerant charging=(L-5)*115(g)Refrigerant chargeRefill refrigerantWhen the outdoor valve is shut,fill the refrigerant from the access hole at the gas and liquidsides.If the required filling is impossible,open all the gas and liquid valves,then slightly shut the gasvalve, run the compressor and fill the refrigerant from the access hole at the gas side.Now adjust the gas valve to control the refrigerant flow,which will be gasified during absorptionby the system.If there is insufficient refrigerant in the system caused by leaks,refill it after the remainingrefrigerant is recollected.Open all valvesOpen all the valves of the outdoor unit.Heat isolation of the pipesSeparate isolation should be made for the liquid and gas pipes.Materials used for the pipe isolation at the gas side must withstand above 120 C temperature.

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