Installation instruction

4.Air discharging method

According to the method of the Figure shown, discharge the air in the indoor unit and pipe out.

(1)Remove the valve cap of little stop valve of the outdoor unit.

(2)Loosen the thick flare screw nut connected to big stop valve for about 1~1.5 circle.

(3)Use spanner (hexagon spanner) open (turn anti-clockwise) the valve core of little stop valve for 90*, after the gas will discharge from the thick flare for about 15 seconds, then fasten the flare screw nut according to the specified torque.

(4)Open the little and big stop valve. (5)Fasten the valve caps of the two valves.

(6)Use leakage detector or soap water to

Liquid pipe Gas pipe

check if there is leakage.

Notice

When the length of the connection pipe of the single system exceeds 5m, it must use external system Freon R407C to discharge the air in the connection pipe out, then discharge the excessive refrigerant by the above method.

The air conditioner newly left factory has been charged additional 80g R407C on the basis of the previous specified refrigerant amount.

This method is only used in the installation for the first time to discharge the air in the connection pipe and indoor unit out.

5. Refrigerant charging amount

When the connection pipe (L) is less than or equal to 5m, it is not necessary to charge additional refrigerant. If the connection pipe (L) exceeds 5m, it needs to be added with 60g refrigerant every meter.

That is: refrigerant charging amount = (L-5)x60(g)

Only in COOLING operation mode can charge the additional refrigerant.

When charging, the refrigerant should be charged through the charging nozzle of the low pressure valve.

When charging the refrigerant, please be careful not to let air mix into the system.

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Haier AU422BIBAA, 0010571564 operation manual Air discharging method, Refrigerant charging amount

0010571564, AU422BIBAA specifications

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