Haier HSU-12HS03/R2DB, HSU-09HS03/R2DB service manual Outdoor Unit

Domestic Air Conditioner	HSU-12HS03/R2(DB)
	Model: HSU-09HS03/R2(DB)

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")

Detach the service port's cap of 3-way ,the

2-way valve

3-way valve

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

Gaugemanifold(for R410A)

Anti countercurrent joint

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 -0.1MPa (-76cmHg) at low
pressure side. After the completion of vacuumizing.
close the handle 'Lo' in gaugemanifold and stop the	Close
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
anti-clockwise 90 degrees.			3-way valve
After 6 seconds, close the 2-way valve and make the		2-way valve
				Service port
inspection of gas leakage.
		Open		for 6 sec.
		If it does not stop gas leakage, discharge
	In case of gas leakage, tighten	whole refrigerants from the service port.
No gas leakage?	parts of pipe connection. If	After flaring work again and vacuumize,
		fill up prescribed refrigerant from the gas
	leakage stops, then proceed
		cylinder.
	steps.
Detach the charge hose from the service port, open
2-way valve and 3-way. Turn the valve rod anti-clockwise				3-way valve
until hitting lightly.		2-way valve
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		2-way valve		3-way valve
suddenly.
				Valve rod cap
After attaching the each caps, check the gas leakage		Service port cap		Valve rod cap

around the caps.

CAUTION:

1.If the refrigerant of the air conditioner leaks, it is necessary to discharge the refrigerant out. 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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