Connecting The Piping; Connection Pipes; Bending Pipes - Fujitsu SPLIT TYPE AIR CONDITIONER User Manual

4. CONNECTING THE PIPING

1. FLARE PROCESSING
(1) Cut the connection pipe with pipe cutters so that the
pipe is not deformed.
(2) Holding the pipe downward so that cuttings cannot
enter the pipe and remove the burrs.
(3) Remove the flare nut from the indoor unit pipe and
outdoor unit and assemble as shown in (Table 3)
and insert the flare nut onto the pipe, and flare with
a flaring tool.
(4) Check if the flared part "L"(Fig. 24) is spread uni-
formly and that there are no cracks.
Table 3
Pipe
Small pipe Small (width across flats 7/8" (22mm))
Large pipe Large (width across flats 31/32" (24mm))
Fig. 24
Width across flats

2. BENDING PIPES

The pipes are shaped by your hands. Be careful not to
collapse them.
Fig. 25
OK Extend the pipe
by unwinding it.
Flare nut
L dimension
Small pipe 3/8"(9.53 mm) dia.
5/64" (1.8 to 2.0 mm)
Large pipe 5/8" (15.88 mm) dia.
3/32" (2.2 to 2.4 mm)
NO
Do not bend the pipes in an angle more than 90°.
When pipes are repeatedly bent or stretched, the
material will harden, making it difficult to bend or
stretch them any more. Do not bend or stretch the
pipes more than 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. 26, 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.
Fig. 26
Heat insulating
pipe
Cutter
Cut line

3. CONNECTION PIPES

(1) Indoor unit side
Centering the pipe against port on the indoor unit,
turn the flare nut with your hand. (Fig. 27)
Be sure that the small pipe is completely installed
before connecting the large the pipe.
Fig. 27
Optional parts
Be sure to apply the pipe against the
port on the indoor unit correctly. If the
centering is improper, the flare nut can-
not be tightened smoothly. If the flare
nut is forced to turn, the threads will be
damaged.
8
Pipe
Indoor unit side