When using the vacuum pump
For method of using a manifold valve, refer to its operation manual.
I. 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 I5 minutes or
more and oheck that the compound
meter indicates -76cmHg (-Ix10
Pa),
6, Turn the stem of the packed valve
B about 45o 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,
Indoor unit
Outdoor unit
Charge hose
Har_dieLo
Handle Hi
_. Charge hose
'vacuum pump
@
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