Haier HSU-1218CR03 Purging Method To use vacuum pump, Outdoor unit, HSU-12CR03-Y HSU-18CR03-Y

Outdoor unit

6.Purging Method:To use vacuum pump

Push the air out of the indoor unit and piping as followes:

(1)Remove the valve cap on 2-way valve in outdoor unit.

(2)Loosen by 1/2 turn the flare nut of gas pipe, which is conneted to 3-way valve.

(3)Loosen 2-way valve by 90o using hexagon wrench, and after approx. 10 sec tighten it up. Gas comes out through flare nut on wide pipe. If no gas is discharged, tighten flare nut with specified torque.

(4)Open 2-way and 3-way valves using specified torque.

(5)Tighten the caps on the valves with specified torque.

	Tighten torque N.m
Valve rod	7-9
Valve cap	20-25

2-way valve	3-way valve
6.35mm(1/4")	12.7mm(1/2")

HSU-12CR03-Y

HSU-18CR03-Y

When connecting pipe exceeds 5 meters, 20g refrigerant shall be added per exceeding meter. Charge according to the following list.

Piping length	5m	7m	10m
Additional amount	No need	40g	100g

Note: When extending piping, air inside piping shall be removed by using external refrigerant gas, charge according to the following list.

Brand new outdoor unit is charged 50g more refrigerant than regulated weight. Only for first installation, this extra 50g can be used to purge air in pipes.

During this procedure, 50g refrigerant will be discharged in piping. (This must be strictly controlled within 90o and 10 sec.)

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