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10.5. Evacuation (Installation)
(No refrigerant in the refrigeration cycle)
(Indoor unit)
(Liquid side)
(Outdoor unit)
2-way
valve
(Gas side)
Open
3-way
valve
Open
Low
High
Open
Closed
Vacuum Pump
Procedure
1.
2.
Confirm that the gauge needle has moved toward -76cmHg
(-0.1MPa) [vacuum of 4 mmHg or less].
3.
4.
Vacuum oil
If the vacuum pump oil becomes dirty or depleted, replenish
as needed.
Connect the vacuum pump to the charge set’s centre hose.
Evacuation for approximately 1 hour.
Close the valve ( Low side ) on the charge set, turn off the
vacuum pump, and confirm that the gauge needle does not
move (approximately 5 minutes after turning off the vacuum
pump).
Disconnect the charge hose from the vacuum.
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