
155
Air purging
The air which contains moisture remaining in the refrigeration cycle may cause a malfunction on the compressor. After
connecting the indoor and outdoor units, evacuate air and moisture from refrigerant cycle using a vacuum pump, as
shown below.
Note:
Because the system pressure is high and also to protect the environment, be sure not to discharge the
refrigerant to the air directly.
Vacuum pump
Indoor
unit
Refrigerant flow direction
3-way valve
Service
port
(2) Turn
(8) Tighten
Valve cap
(1) Turn
(8) Tighten
(7) Turn to fully open
the valve
2-way valve
(6) Open 1/4 turn
(7) Turn to fully open the valve
Valve cap
(1) Turn
(8) Tighten
3-way valve diagram
Connect to indoor unit
Open
position
Spindle
Needl
Service
port cap
Valve core
Connect to outdoor unit
33933051GB.fm Page 155 Tuesday, January 18, 2005 3:31 PM
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