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Installation Procedures
(4) Purging method ( the refrigerant is R407C)
To use vacuum pump
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.
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.
If needing to recycle the refrigerant gas when installation or repair , please refer to the following procedures:
1. Cut off the power
2. (After confirming the power is cut off) pull the power cable plug terminals of the low-pressure pressure-switch out.
3. (After confirming the power cable terminals of the low-pressure pressure-switch is cut off) After powering on the unit again
and switch to COOLING mode,perform refrigerant gas recycling according to the normal refrigerant gas recycling procedure.
4. After finishing refrigerant gas recycling , cut off the power , then insert the power cable terminals of the low-pressure
pressure-switch properly.
2
Open
3
Close
If it does not stop gas leakage, discharge
whole refrigerants from the serice port.
After flaring work again and vacuumize,
6
fill up prescribed refrigerant from the gas
cylinder.
30
Liquid pipe
6.35mm(1/4'')
Gas pipe
2-way valve
15.88mm(5/8'')
3-way valve
Gaugemanifold
Vacuum pump
2-way valve
90
90
2-way valve
3-way valve
2-way valve
3-way valve
Service port cap
7
3-way valve
Service port
4
90 for 6 sec.
6
6
Valve rod cap
7
Valve rod cap
7
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