Haier AU252CHAAA [11/19] Installihjonjirocedure connection of pipes

Connection of pipes InstalliHjonjirocedure 4 Pipe connection of tlK outdoor unit Referring io the installation diagram in page 4 connect the indoor unit outdoor unit manifold pipe and electronic expansion valve together by using the pipe coiiwction method and welding nielliod Ill Text of airtight quality Aller connection of die refrigerant pipes cam out airtight quality lest In this test pressurize to tire pipes as sliown in Ilie below figure by using nitrogen tank Close Ilie valves of the gas side and liquid side totally The nitrogen may enter lie cy cle sy stem of the ou tdoor unit so that before pressurizing the valve rods must be fastened i Both the gas side and liquid side For each of the refrigerant sy stem pressurize from the discharge v alvc of gas side in procedure When doing airtight quality test it is absolutely forbidden to use oxygen flammable gas and poisonous gas If the lu ptcssurc valve ol the outdoor unit is way valve Low pressure High pressure When lie hi pressure valve of the outdoor unit is 2 way valve Low pressure High pressure III

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