Connecting The Piping - Fujitsu AOU18RL Installation Manual

●
For left piping and left rear piping, align the marks on the wall
hook bracket and shape the connection pipe.
●
Bend the connection piping at a bend radius of 2 - 3/4''(70 mm) or
more and install no more than 1- 3/8''(35 mm) from the wall.
●
After passing the indoor piping and drain hose through the wall
hole, hang the indoor unit on the hooks at the top and bottom of
the wall hook bracket.
[Installing the indoor unit]
●
Hang the indoor unit from the hooks at the top of the wall hook
bracket.
●
Insert the spacer, etc. between the indoor unit and the wall hook
bracket and separate the bottom of the indoor unit from the wall.
Indoor unit
Wall hook bracket
4.

CONNECTING THE PIPING

CONNECTION
(1) Install the outdoor unit wall cap (supplied with the optional in-
stallation set or procured at the site) to the wall pipe.
(2) Connect the outdoor unit and indoor unit piping.
(3) After matching the center of the flare surface and tightening the
nut hand tight, tighten the nut to the specified tightening torque
with a torque wrench. (Tighten the flare nut of the outdoor unit
3-way valve after air purging.)
FLARING
(1) Cut the connection pipe to the necessary length with a pipe cutter.
(2) Hold the pipe downward so that cuttings will not enter the pipe
and remove the burrs.
(3) Insert the flare nut onto the pipe and flare the pipe with a flaring
tool.
Check if [L] is flared uniformly
and is not cracked or scratched.
L dimension
Thin pipe 1/4" (6.35 mm)dia. ...... 1/16" (1.4 to 1.7 mm)
Thick pipe 1/2" (12.7 mm)dia. ...... 5/64" (1.9 to 2.2 mm)
BENDING PIPES
The pipes are shaped by your hands. Be careful not to collapse them.
Extend the pipe
OK
by unwinding it.
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.
Fig. 4
Bend 2-3/4''(R70)
with a pipe bender
(Spacer)
Indoor unit
After hooking the indoor unit to the top hook, hook the fittings of the
indoor unit to the two bottom hooks while lowering the unit and
pushing it against the wall.
Fig. 5
Torque wrench
Indoor unit pipe
Table 2
1/4" (6.35 mm)dia.
1/2" (12.7 mm)dia.
(1) Fasten a flare nut with a torque wrench as instructed in this manual. If
fastened too tight, the flare nut may be broken after a long period of time
and cause a leakage of refrigerant.
(2) During installation, make sure that the refrigerant pipe is attached firmly
before you run the compressor. Do not operate the compressor under the
condition of refrigerant piping not attached properly with 2-way or 3-way
valve open. This may cause abnormal pressure in the refrigeration cycle
that leads to breakage and even injury.
NO
Align the marks.
Connection pipe
(1/2''(12.7 mm) dia.)
(Fitting)
Tighten with two wrenches.
Wrench (fixed)
Flare nut
Connection pipe
Flare nut tightening torque
Flare nut Tightening torque
11.57 to 13.02 ft•lbs
(160 to 180 kgf•cm)
36.17 to 39.78 ft•lbs
(500 to 550 kgf•cm)
CAUTION
Connection pipe
(1/4" (6.35 mm) dia.)
Top hooks
Wall hook
bracket
Bottom hooks
To prevent gas leakage,
coat the flare surface
with refrigerator oil.