77
S4179544
77
S4179544
1
1
1
1
1
AS
3
3
3
3
3
X
0
0
0
0
0
C
2
2
2
2
2
S
●
If the additional refrigerant charge amount cannot
be charged at once, charge the remaining
refrigerant in gas form by using the wide tube
service valve with the system in cooling operation
mode.
Finishing the job
(1)
With a hex wrench, turn the narrow tube service
valve stem counter-clockwise to fully open the
valve.
(2)
Turn the wide tube service valve stem counter-
clockwise to fully open the valve.
To avoid gas from leaking
when removing the charge
hose, make sure the stem
of the wide tube is turned
all the way out (“BACK
SEAT” position).
(3)
Loosen the charge hose connected to the wide
tube service port (1/4 in.) slightly to release the
pressure, then remove the hose.
(4)
Replace the 1/4 in. flare nut and its bonnet on the
wide tube service port and fasten the flare nut
securely with an adjustable wrench or box
wrench. This process is very important to prevent
gas from leaking from the system.
(5)
Replace the valve caps at both wide and narrow
service valves and fasten them securely.
This completes air purging with a vacuum pump. The
air conditioner is now ready for a test run.
CAUTION