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Haier AP242ACAAA Technical Manual page 56

Cabinet air conditioner
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3. Piping connection of outdoor unit.
Connect the connecting pipe and inlet and outlet liquid pipe according to the piping
method.
Purging method
Purge air out of indoor unit and piping as shown in the Fig.
(1) Remove the valve cap on 2-way valve in outdoor unit.
(2) Loosen by 1-1.5 turn the flare nut of gas pipe, which is connected to 3-way valve.
(3) Loosen the valve rod of 2-way valve by 90 degrees (use a hexagon wrench) for
about 15 seconds, air will be pushed out from flare nut on gas pipe.
(4)Open 2-way and 3-way valves using specified torque.
(5) Tighten the caps on the valves with specified torque.
(6) Conduct gas leakage using gas leakage detector or soap water.
Note: When additional refrigerant piping is necessary, first purge air out of
connecting pipe by external gas, then drive out the excessive refrigerant
by purging method.
Brand new unit is charged 80g more refrigerant than spec. This is only for
first installation to purge air in the indoor unit and connecting pipe.
When piping is longer than 5 m, charge additional refrigerant specified in this list.
Pipe length
Refrigerant charge(g)
Gas pipe
15.88mm(5/8")
Liquid pipe
9.52mm(3/8")
90
5m
10m
250
46
Flare nut
15m
20m
500
750

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