b) Leak test
(1) After confirming the power is off, disconnect the
connector (GRN) (between timer and terminal 5)
to separate A and B parts. (Fig. 8-4 ) Then
connect part A of this connector (GRN) with the
connector C (BLU) and turn on the power
source. (Fig. 8-5 )
(2) With the hexagonal wrench, turn the valve stem
on the narrow tube service valve
counterclockwise by 90 degrees (1/4 turn) for
10 seconds, and then turn the stem clockwise
to close it again. (Fig. 8-6)
(3) 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.
c) Finishing job
(1) With the hexagonal wrench, turn the wide tube
service valve stem counterclockwise to fully
open the valve.
(2) Turn the narrow tube service valve stem
counterclockwise to fully open the valve.
(3) Loosen the vacuum hose connected to the
wide tube service port. Then, remove the hose.
(4) 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. Next, mount the valve cap and tighten
it with a torque wrench (the cap needs to be
tightened with the torque of 200 kg-cm).
This process is very important to prevent
gas from leaking from the system.
(5) Turn off the power source.
(6) Connect parts A and B of the connector
(GRN) as original state. (Fig. 8-4)
To air purge unit C, perform steps (2) and (3) of
b) Leak test and then steps (1) to (4) of c) Finishing
job in order.
This completes air purge with a vacuum pump. The
air conditioner is now ready to test run.
(To be continued to page 15)
14
English
Be sure to completely insert
the hex wrench before
attempting to turn the valve.
CAUTION
!
NOTE
4
2
1
3
8
6
5
7
1
BLU
B
A
GRN
C
TERMINAL 8P
OUTDOOR UNIT
2
3
4
5
TERMINAL 5P
Fig. 8-4
Fig. 8-5
Fig. 8-6
Hex wrench
Narrow tube
Wide tube
Vacuum
hose to
manifold
value
Valve cap
90°(1/4 turn)
GRN (A)
BLU (C)
