Haier AC142ACNAC Service Manual page 25

2
Open the handle at low in gaugemanifold, operate
vacuum pump. If the scale-moves of gause (low)
reach vacuum condition in a moment, check 1 again.
3
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.
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 3 .
4
Open the valve rod for the 2-way valve to and angle of
anticlockwise 90 degree.
After 6 seconds later, close the 2-way valve and male
the inspection of gas leakage.
5
In case of gas leakage, tighten
parts of pipe connection. If
No gas leakage?
leakage stops, then proceed
steps.
6
Detach the charge hose from the service port, open
2-way valve and 3-way. Turn the valve rod
anticlockwise until hitting lightly.
7
To prevent the gas leakage, turn the service port's
cap, the valve rod'd cap for 2-way valve and 3-way's
a lottle more than the point where the torque increases
suddenly.
8
After attaching the each caps, check the gas leakage
around the caps.
CAUTION:
If the refrigerant of the air conditioner leaks, it is necessary to make
all the refrigerant out, then charge the liquid refrigerant into air
conditioner according to the amount marked on the name plate.
2-way valve
3-way valve
90•
If it does not stop gas leakage, discharge whole refrigerants from the serice port.
After flaring work again and vacuumize, fill up prescribed refrigerant from the gas
6
cylinder.
2-way valve
3-way valve
6
For series 14,18
2-way valve
3-way valve
Service port cap
7
For series 14,18
INSTALLATION INSTRUCTIONS
2 Open
3 Close
Open
Service port
90•
4 90• for 6 sec.
For series 14,18
Open
90•
90•
For series 36,42
6
For series 24,28
6
6
6
For series 36,42
7 Valve rod cap
7 Valve rod cap
2-way valve
3-way valve
7 Valve rod cap
Service port cap
7
7 Valve rod cap
For series 36,42
2-way valve
3-way valve
For series 24,28
Open
Service port
90•
90•
4 90• for 6 sec.
2-way valve
3-way valve
Service port
4 90• for 6 sec.
2-way valve
3-way valve
6
2-way valve
Liquid pipe 9.52mm
3-way valve
Gas pipe 19.05mm
2-way valve
3-way valve
For series 24,28
7 Valve rod cap
7 Valve rod cap
Service port cap
7