Manual Inventor V4MFO-66B (page 11 of 30) (English)

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5. Air Purging(Using the Vacuum Pump)

(For method of using a manifold valve, refer to its operation manual.)

1. Completely tighten the flare nuts, A, B, C, D, connect the manifold valve charge hose to a charge

port of the low-pressure valve on the gas pipe side.

2. Connect the charge hose connection to the vacuum pump.

3. Fully open the handle Lo of the manifold valve.

4. Operate the vacuum pump to evacuate. After starting evacuation, slightly loose the flare nut of the

Lo valve on the gas pipe side and check that the air is entering.(Operation noise of the vacuum

pump changes and a compound meter indicates 0 instead of minus).

5. After the evacuation is complete, fully close the

handle Lo of the manifold valve and stop the

operation of the vacuum pump. Make evacuation

for 15 minutes or more and check that the

compound meter indicates -76cmHg(-1x10 Pa).

6. Turn the stem of the packed valve B about 45

counterclockwise for 6~7 seconds after the gas

coming out, then tighten the flare nut again. Make sure

the pressure display in the pressure indicator is a little

higher than the atmosphere pressure.

7. Remove the charge hose from the Low pressure charge hose.

8. Fully open the packed valve stems B and A.

9. Securely tighten the cap of the packed valve.

Manifold valve

Compound meter

-76cmHg

Handle Lo Handle Hi

Charge hose Charge hose

Vacuum pump

Pressure gauge

Low pressure valve

Drain Pipe of The Indoor Unit

Make sure the drain pipe is connected to the outdoor side downward;

The hard polyvinyl chloride(PVC)plastic pipe (external diameter 26 mm) sold in the market is

suitable for attached with the soft drain pipe;

Please connect the Soft Drain Pipe with the Drain Pipe , then fix it with band; if you have to connect

the Drain Pipe indoors, to avoid condensing caused by air intake, you must protect the pipe with

heat-insulation material (polyethylene with Specific Gravity of 0.03, at least 9 mm in thickness),

and wrap it with band.

After the Drain Pipe has been connected, please check if the water drains out through the pipe

efficiently without leakage.

Refrigerant Pipe and Drain Pipe should be heat-insulated to avoid condensing and water -dropping

later on.

Drain Pipe

Drain pipe

Wrapping Band

Drain Pipe Connection

PIPE CONNECTION

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Inventor V4MFO-66B Manual

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