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10.3 Air Purging - (Continued)
5. With the vacuum pump still running, close
the "Low" knob of the manifold valve. Then
stop the vacuum pump.
6. With the accessory hex wrench, turn the
valve stem on the narrow tube service valve
counter-clockwise by 90 degrees (1/4 turn)
for 10 seconds, and then turn the stem
clockwise to close it again. (Fig.36)
Be sure completely insert the hex
wrench before attempting to turn
the valve.
7. Leak test all joints at tubing (both indoor and
outdoor) with liquid soap. Bubbles indicate a
leak. Be sure to wipe off the soap with a
clean cloth.
8. WIth the hex wrench, turn the wide tube
service valve stem counter-clockwise to fully
open the valve.
9. Turn the narrow tube service valve stem
counter- clockwise to fully open the valve.
10. Loosen the vacuum hose connected to the
wide tube service port slightly to release the
pressure. Then, remove the hose.
This may cause the refrigerant gas
to leak. In order to avoid this, take
off the hose quickly.
11. Fasten the valve cap on the wide tube
service port securely with an adjustable
wrench or box wrench. Next, mount the
valve cap on the service valve and
tightened it to 200 kg-cm with a torque
wrench. This process is very important to
prevent gas leaking from the system.
12. Test run the air conditioner. (See page 33)
13. While the air conditioner is running, apply
liquid soap to check for any gas leaks
around the service valves or caps.
14. If there is no leakage, stop the air
conditioner.
15. Wipe off the soap on the tubing.
This completes air purging with a
vacuum pump and the air conditioner is
ready for actual operation.
Fig. 36
90 (1/4 turn)
Narrow tube
Hex wrench
Wide tube
Valve Cap
Vacuum hose to manifold valve
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CAUTION
CAUTION
10. INSTALL OUTDOOR UNIT
Installation Service