Connecting The Piping; Bending Pipes; Installing The Indoor Unit - Fujitsu ASU24CL 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 the bend radius of 4"(100 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

CONNECTING THE PIPING

CONNECTION
(1) Install the outdoor unit wall cap (supplied with the optional
installation 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.
FLARING
(1) Cut the connection pipe to the
necessary length with a pipe cut-
ter.
(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.
Insert the flare nut (always use the
flare nut attached to the indoor and
outdoor units respectively) onto the
pipe and perform the flare process-
ing with a flare tool.
Use the special R410A flare tool,
or the conv-entional (for R22) flare
tool.
When using the conventional flare
tool, always use an allowance ad-
justment gauge and secure the A di-
mension shown in the table.

BENDING PIPES

(1) When bending the pipe, be careful not to crush it.
(2) To prevent breaking of the pipe, avoid sharp bends.
Bend the pipe with a radius of curvature of 6" (150 mm) or
over.
(3) If the copper pipe is bend the pipe or pulled to often, it will
become stiff.
Do not bend the pipes more than three times at one place.
(Spacer)
Check if [L] is flared uniformly
and is not cracked or scratched.
Die
A
Pipe
Alignment marks
Wall hook
bracket
Connection piping
Indoor unit
(Fitting)
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.
Tighten with two wrenches.
Wrench (fixed)
Flare nut
Torque
wrench
Connection pipe
Indoor unit pipe
Flare nut tightening torque and L dimension
Flare nut Tightening torque
11.8 to 13.3 ft•lbs
1/4" (6.35 mm) dia.
(160 to 180 kgf•cm)
46.5 to 55.3 ft•lbs
5/8" (15.88 mm) dia.
(630 to 750 kgf•cm)
Pipe outside diameter
Pipe outside
Flash tool for
diameter
R410A, clutch type
ø 6.35 mm (1/4") 0 to 0.5
ø 15.88 mm (5/8") 0 to 0.5
CAUTION
(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.
Small piping
Large piping
Top hooks
Wall hook
bracket
Bottom hooks
To prevent gas leakage, coat the flare
surface with refrigerator oil.
L dimension
1.4 to 1.7mm
2.2 to 2.4mm
A (mm)
Conventional (R22) flare tool
Clutch type Wing nut type
1.0 to 1.5 1.5 to 2.0
1.0 to 1.5 1.5 to 2.0