Filter
Top Products
S4359128
25
(5) With the vacuum pump still running, close the “Lo”
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 degress (1/4 turn) for 10 seconds, and then turn
the stem clockwise to close it again. (Fig. 8-2)
Be sure to completely insert
the hex wrench before
attempting to turn the valve.
(7) Leak test all joints at the tubing (both indoor and
outdoors) 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.
(11) Replace the bonnet and flare nut on the wide tube
service port and fasten the flare nut securely with an
adjustable wrench or box wrench or box wrench.
Next, mount the valve cap and tighten it with a torque
wrench (the cap needs to be tightened with the torque
of 170 ibs.·in. (200 kg·cm)). This process is very
important to prevent gas from leaking from the
system.
(12) Test run the air conditioner. (See next page.)
(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.
CAUTION
Fig. 8-2
90° (1/4 turn)
Narrow tube
Hex wrench
Wide tube
Valve cap
Vacuum hose to manifold valve
1825
_
M
_
I