92
purge the air from the system
1. Unscrew and remove caps from the 2 and 3-way valves.
2. Unscrew and remove cap from the service valve.
3. Connect vacuum pump flexible hose to the service valve.
4. Run vacuum pump for 10 to 15 minutes until reaching a vacuum
of 10 mm Hg absolute.
5. With vacuum pump still running, close the low pressure knob on
vacuum pump manifold, then stop the vacuum pump.
6. Open 2-way valve 1/4 turn, then close it after 10 seconds. Check
tightness of all joints using liquid soap or an electronic leak detec-
tor
.
7. Turn 2 and 3-way valves stems to fully close both valves. Discon-
nect the flexible vacuum pump hose.
8. Replace and tighten all valve caps.
Note: To protect the environment, be sure not to discharge the re-
frigerant directly into the air.
The air that contains moisture and remains in the refrigeration cycle
may cause a malfunction on the compressor. After connecting the
indoor and outdoor units, release air and moisture from the refrig-
erant using a vacuum pump, as described below.
Service
port
(2) Turn
(8) Tighten
Valve cap
(1) Turn
(8) Tighten
(7) Turn to fully
open the valve
3-Way valve
Refrigerant
flow direction
Indoor
Unit
2-Way valve
(6) Open 1/4 turn
(7) Turn to fully open the valve
Valve cap
(1) Turn
(8) Tighten
Connect to
outdoor unit
Valve core
Service port
cap
Needle
Spindle
Open
position
Connect to indoor unit
Vacuum Pump
3-Way Valve Diagram
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