Haier AD242AMNAA, Instruction Manual, Page: 33 / 35

AIR PURGING METHOD (TO USE VACUUM PUMP)
32
3-way valve
3-way valve
2-way valve
2-way valve
7 Valve rod cap
Valve rod cap 7
Service port cap
7
7 Valve rod cap
Valve rod cap 7
Service port cap
7
For series 24,28
For series 36,42
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
cylinder.
Detach the charge hose from the service port, open
2-way valve and 3-way. Turn the valve rod
anticlockwise until hitting lightly.
6
In case of gas leakage, tighten
parts of pipe connection. If
leakage stops, then proceed
steps.
6
No gas leakage?
5
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.
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 .
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.
1
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
(low) for gaugemanifold. Then connect the projection
of charge hose (center) for gaugemanifold into
vacuum pump.
To use vacuum pump
3 Close
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.
7
8
After attaching the each caps, check the gas leakage
around the caps.
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.
2 Open
AD28NAMBAA AU28NANBAA (HDU-28HA03/M(R1)), AD42NAMBAA AU42NAPBAA (HDU-42HA03/M(R1))
AD28NAMNAA AU28NANNAA (HDU-28CA03/M(R1)), AD42NAMNAA AU42NAPNAA (HDU-42CA03/M(R1))
AD36NAMNAA AU36NAPNAA (HDU-36CA03/M(R1)), AD36NAMBAA AU42NAPBAA (HDU-36HA03/M(R1))
AD242AMNAA AU242ANNAA (HDU-24CA03/M(R1)) the refrigerant is R407C.
For
3-way valve
2-way valve
2-way valve
3-way valve
Open
90
Service port
90
4 90 for 6 sec.
90
Service port
90
4 90 for 6 sec.
Open
3-way valve
2-way valve
Liquid pipe 9.52mm
Gas pipe 19.05mm
2-way valve
3-way valve
6
6
6
6
For series 24,28
For series 36,42
For series 24,28
For series 36,42
Vacuum pump
Gaugemanifold
Vacuum pump
For series 24,28
3-way valve
2-way valve
Gaugemanifold
2-way valve
3-way valve
For series 36,42