Fujitsu ARXB07L, Руководство по установке

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En-9
B
Die
A
Pipe
Check if [L] is flared uniformly
and is not cracked or scratched.
L
Pipe outside
diameter
[mm (in.)]
Dimension A [mm]
Dimension B
-
0
0.4
[mm]
Flare tool for R410A,
clutch type
6.35 (1/4)
0 to 0.5
9.1
9.52 (3/8) 13.2
12.70 (1/2) 16.6
15.88 (5/8) 19.7
19.05 (3/4) 24.0
When using conventional fl are tools to fl are R410A pipes,
the dimension A should be approximately 0.5 mm more
than indicated in the table (for
fl aring with R410A fl are tools)
to achieve the speci fi ed fl aring. Use a thickness gauge to
measure the dimension A.
Width across
Pipe outside
diameter [mm (in.)]
Width across flats
of Flare nut [mm]
6.35 (1/4) 17
9.52 (3/8) 22
12.70 (1/2) 26
15.88 (5/8) 29
19.05 (3/4) 36
4.3.2. Bending pipes
• If pipes are shaped by hand, be careful not to collapse
them.
• Do not bend the pipes in an angle more than 90°.
•
When pipes are repeatedly bend or stretched, the material
will harden, making it dif
fi cult to bend or stretch them any
more.
•
Do not bend or stretch the pipes more than three times.
CAUTION
• To prevent breaking of the pipe, avoid sharp bends.
• If the pipe is bent repeatedly at the same place, it will break.
4.3.3. Pipe connection
CAUTION
• Be sure to apply the pipe against the port on the indoor unit
correctly. If the centering is improper, the fl are nut cannot be
tighten smoothly. If the fl are nut is forced to turn, the threads
will be damaged.
• Do not remove the fl are nut from the indoor unit pipe until
immediately before connecting the connection pipe.
• Hold the torque wrench at its grip, keeping it in the right
angle with the pipe, in order to tighten the fl are nut correctly.
• Tighten the flare nuts with a torque wrench using the
speci fi ed tightening method. Otherwise, the fl are nuts could
break after a prolonged period, causing refrigerant to leak
and generate a hazardous gas if the refrigerant comes into
contact with a
fl ame.
When the fl are nut is tightened properly by your hand, hold
the body side coupling with a separate spanner, then tighten
with a torque wrench. (See the table below for the
fl are nut
tightening torques.)
Connection pipe
Torque wrench
Indoor unit pipe
(Body side)
Flare nut
Holding wrench
Tighten with two wrenches.
Flare nut [mm (in.)] Tightening torque [N·m (kgf·cm)]
6.35 (1/4) dia. 16 to 18 (160 to 180)
9.52 (3/8) dia. 32 to 42 (320 to 420)
12.70 (1/2) dia. 49 to 61 (490 to 610)
15.88 (5/8) dia. 63 to 75 (630 to 750)
19.05 (3/4) dia. 90 to 110 (900 to 1,100)
Route the pipe as shown in the illustration below.
• CEILING CONCEALED TYPE
Control box cover
Pipe NO GOOD
OK
• FLOOR STANDING CONCEALED TYPE
OK OK
NO GOOD
CAUTION
• Connect the piping so that the control box cover can easily
be removed for servicing when necessary.
• In order to prevent water from leaking into the control box,
make sure that the piping is well insulated.