Bending Pipes; Connection Pipes - Fujitsu SPLIT TYPE AIR CONDITIONER Installation Manual

2. BENDING PIPES

The pipes are shaped by your hands. Be careful not to
collapse them.
Fig. 22
Extend the pipe
OK
by unwinding it.
Do not bend the pipes in an angle less than 90°.
When the pipes are bent and stretched repeatedly, the
material will be hardened, causing the pipes no longer
be sent or stretched. Be sure to limit number of bend-
ing and stretchings to three times.
When bending the pipe,
do not bend it as is. The
pipe will be collapsed.
In this case, cut the heat
insulating pipe with a
sharp cutter as shown in
Fig. 23, and bend it after
exposing the pipe. After bending the pipe as you
want, be sure to put the heat insulating pipe back on
the pipe, and secure it with tape.

3. CONNECTION PIPES

[Indoor unit side]
(1) Remove the filter guide. (Fig. 24)
Fig. 24
Indoor unit
(2) Attach the connection pipe. (Fig. 25)
Fig. 25
Indoor unit
• For Top piping and
use the Auxiliary pipe (large pipe) provided.
(See Fig. 26)
Fig. 26
Top piping
Large pipe
Auxiliary pipe (large pipe)
Right piping
NO
Pipe
Fig. 23
Heat insulating
pipe
Cutter
Cut line
Filter guide
Large pipe
Small pipe
Right piping connections,
Large pipe
Indoor unit (rear)
Be sure to apply the pipe against the port on
the indoor unit correctly. If the centering is
improper, the flare nut cannot be tightened
smoothly. If the flare nut is forced to turn, the
threads will be damaged.
When the flare nut is tightened properly by your hand,
hold the body side coupling with a separate spanner,
then tighten with a torque wrench. (Fig. 27)
Fig. 27
Body side
Hold the torque wrench at its grip, keeping
it in the right angle with the pipe as shown
in Fig. 27, in order to tighten the flare nut
correctly.
Table 4 : Flare nut tightening torque
Pipe
Small pipe
Large pipe
[Outdoor unit side]
(1) Tighten the flare nut of the connection pipe at the
outdoor unit valve connector. The tightening
method is the same as that as at the indoor side.
(2) Seal with the accessory putty so that water does not
enter at the top of the pipe insulation installed to the
connection pipe (large pipe and small pipe).
Fig. 28
Valve A
(small)
Flare nut
Putty
7
yy yy
Holding wrench
90°
Torque wrench
Tightening torque
22.42 to 25.32 ft. lbs
(310 to 350 kgf cm)
•
57.86 to 72.37 ft. lbs
(800 to 1,000 kgf cm)
•
Valve B (large)
Connection pipe
(Small pipe)
(Large pipe)