Haier HSU-09HSA03/R2(DB), HSU-12HSA03/R2(DB) manual Purging MethodTo use vacuum pump

Haier air conditioner Edition: 20070116

Outdoor unit

5.Purging Method:To use vacuum pump

3-way valve Gas Side 12.7mm(1/2")

2-way valve Liquid Side 6.35mm(1/4")

Detach the service port's cap of 3-way valve, the valve rod's cap for 2-way valve and 3-way's, connect the service port into the projection of charge hose (Iow) for gaugemanifold. Then connect the projection of charge hose (center) for gaugemanifold into vacuum pump.

Gaugemanifold(for R410A)

Anti countercurrent joint

Tube(for R410A) Vacuum pump(for R410A)

Open the handle at Iow in gaugemanifold, operate vacuum pump. If the scale-moves of gause (Iow)

reach vacuum condition in a moment, check again.

Vacuumize for over 15min. And check the level gauge which should read -0.1 MPa (-76 cm Hg) at Iow pressure side. After the completion of vacuumizing, close the handle 'Lo' in gaugemanifold and stop the operation of the vacuum pump.

Check the condition of the scale and hold it for 1-2min. If the scale-moves back in spite of tightening, make flaring work again, the return to the beginning of .

Open the valve rod for the 2-way valve to an angle of anticlockwise 90 degrees.

After 6 seconds, close the 2-way valve and make the inspection of gas leakage.

In case of gas leakage, tighten

No gas leakage? parts of pipe connection. If leakage stops, then proceed steps.

Detach the charge hose from the service port, open

2-way valve and 3-way. Turn the valve rod anticlockwise until hitting lightly.

Open

Close

Open

90O

If it does not stop gas leakage, discharge whole refrigerants from the service port. After flaring work again and vacuumize, fill up prescribed refrigerant from the gas cylinder

3-way valve

2-way valve

2-way valve	3-way valve
6.35mm(1/4")	9.52mm(3/8")
	12.7mm(1/2")

HSU-09HSA03/R2(DB)

HSU-12HSA03/R2(DB)

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

3-way valve 9.52mm(3/8") 12.7mm(1/2")

HSU-18HSA03/R2(DB)

HSU-22HSA03/R2(DB)

To prevent the gas leakage, turn the service port's cap, the valve rod's cap for 2-way valve and 3-way's a little more than the point where the torque increases suddenly.

After attaching the each caps, check the gas leakage around the caps.

CAUTION:

1.If the refrigerant of the air conditioner leaks, it is necessary to discharge all the refrigerant. Vacuumize first, then charge the liquid refrigerant into air conditioner according to the amount marked on the name plate.

2-way valve

Valve rod cap

Valve rod cap

Service port cap

2.Please do not let other cooling medium, except specified one (R410A),

or air enter into the cooling circulation system. Otherwise, there will be

abnormal high pressure in the system to make it crack and lead to

personal injuries.

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