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using a vacuum cleaner as purging method
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 pro-
jection of charge hose (low) for gauge manifold. Then connect
the projection of charge hose (center) for gauge manifold into
vacuum pump.
2. Open the handle at low in gauge manifold, operate vacuum
pump. If the scale moves of gauge (low) reach vacuum condition
in a moment, check 1 again.
3. Vacuum for over 15 minutes and check the level gauge which
should read -0,1 MPa (76 cm Hg) at low pressure side. After the
completion of vacuum, close the handle "LO" in gauge manifold
and stop the operation of the vacuum pump. Check condition of
the scale and hold it for 1-2 min. If the scale moves back in spite
of tightening, make flaring work again, the return to the begin-
ning of 3.
4. 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.
5. No gas leakage?
In case-of gas leakage, tighten parts of pipe. If leakage stops,
then proceed to step 6.
If it does not stop, discharge whole refrigerants from the service
port. After flaring work again and vacuum, fill up prescribed re-
frigerant from the gas cylinder.
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 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.
8. After attaching each cap, check for gas leakage around the caps.
2-way valve. Liquid side
3-way valve. Gas side
Step 1
Tubes (for R410A)
Gauge manifold
(for R410A)
Anti countercurrent
joint
Vacuum pump
(for R410A)
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