Copyright 2013 HotSpot Energy
Using the Vacuum Pump
FOLLOW THE INSTRUCTIONS INCLUDED WITH THE VACUUM PUMP. MAKE SURE YOU HAVE PROPER
R410A FITTINGS
1.Completely tighten the flare nuts, A, B, C, D,
connect the manifold valve charge hose to a
charge port of the packed valve on the gas pipe
side.
2.Connect the charge hose to the vacuum pump.
3. Fully open the Lo handle of the manifold valve.
4.Operate the vacuum pump to evacuate. After
starting evacuation, slightly loose the flare nut of
the packed 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 Lo handle 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(-1.0x10 Pa).
See figure 21
6. Turn the stem of the packed valve B about 45
counterclockwise for 6~7 seconds after noticing
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.
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