Haier 001051, HSU-0912RF03 Outdoor unit, Purging Method To use vacuum pump, Open

Outdoor unit

5.Purging Method:To use vacuum pump	Liquid Side	Gas Side
	6.35mm(1/4")	9.52mm(3/8")
		12.7mm(1/2")

	2-way valve	3-way valve
Detach the service port's cap of 3-way valve, the
valve rod's cap for 2-way valve and 3-way's, connect		Gaugemanifold(for R410A)
the service port into the projection of charge hose		Anti countercurrent joint
(low) for gaugemanifold. Then connect the projection
of charge hose (center) for gaugemanifold into
vacuum pump.	Tube(for R410A)	Vacuum pump(for R410A)

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

reach vacuum condition in a moment, check again.

Open

Vacuumize for over 15min. And check the level gauge which should read -0.1 MPa (-76 cm Hg) at low pressure side. After the completion of vacuumizing,

close the handle 'Lo' in gaugemanifold and stop the

operation of the vacuum pump. Close 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.

2-way valve 3-way valve

Open	Service port
	90ofor 6 sec.
90o

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.

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:

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

2-way valve 3-way valve

2-way valve 3-way valve

Valve rod cap Service port cap Valve rod cap

Liquid Side 6.35mm(1/4")

2-way valve

Gas Side

9.52mm(3/8")

3-way valve

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.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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