Expelling the Air
Outdoor Unit Refrigerant Discharging Method:
• After the pipe side connection is complete, proceed as follows.
Vacuum Pumping Method:
(R410A refrigerant evacuation must use the Vacuum Pumping Method)
• Before working on the air conditioner, remove the cover of the stop valve (gas
and liquid valves) and be sure to retighten afterward. This is done to prevent
potential air leakage.
1. To prevent air leakage, tighten all
the flare tube connecting nuts.
2. Connect the stop valve, charge
hose, manifold valve, and vacuum
pump.
3. Fully open the “Handle Lo” of the
manifold valve and apply the
vacuum for at least 15 minutes.
Check that the compound vacuum
gauge reads -0.1 Mpa (-76cmHg).
4. After applying the vacuum, fully
open the stop valve with a hex
wrench.
5. Check that both indoor and
outdoor connections are free of air
leakage.
INSTALLATION: OUTDOOR UNIT
16
Loosen the temporarily
fastened nut by half a
turn.
Loosen the Hex wrench
by half a turn.
Wait for 8 seconds.
Quickly tighten and
connect the nut.
Fully open the spindles of
the liquid end and of the
other two ends.
Check that all indoor and
outdoor connections are
free of air leakage.
The installing torque
is the same as that of
the gas end of the
indoor unit.
Gas Part
Liquid Part
Compound meter
~76cmHg
Handle Lo
Handle Hi
Manifold Valve
Pressure Gauge
Charge Hoses
Stop Valve
(Liquid Valve)
Stop Valve
(Gas Valve)
Vacuum Pump
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