Evacuation - Heat Controller VMC09SB-1 Service Manual

3. Evacuation

Vacuum pump
• Procedure
(1) Connect the vacuum pump to the center hose
of charge set center hose
(2) Evacuation for approximately one hour.
– Confirm that the gauge needle has moved
toward 0.8 Torr (2PSF).
Only for training and service purposes
Indoor unit
Lo
OPEN
OPEN
Liquid side
3-Way
valve
Gas side
3-Way
valve
Vacuum
Gage
(3) Close the valve (Lo side) on the charge set,
turn off the vacuum pump, and confirm that
the gauge needle does not move (approxima-
tely 5 minutes after turning off the vacuum
pump).
(4) Disconnect the charge hose from the vacuum
pump.
– Vacuum pump oil.
If the vacuum pump oil becomes dirty or
depleted, replenish as needed.
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Part 4 Trouble Shooting
Outdoor unit
Open
Open