Fujitsu Compact Wall Mounted Type Installation Manual page 8

Dimension A
Pipe outside
[mm (in.)]
diameter
Flare tool for R410A,
[mm (in.)]
clutch type
6.35 (1/4)
9.52 (3/8)
12.70 (1/2) 0 to 0.5 (0 to 0.020)
15.88 (5/8)
19.05 (3/4)
When using conventional À are tools to À are R410A pipes, the
dimension A should be approximately 0.5 mm (0.020 in.) more
than indicated in the table (for À aring with R410A À are tools)
to achieve the specified flaring. Use a thickness gauge to
measure the dimension A.
Pipe outside diameter
Width across
[mm (in.)]
flats
6.35 (1/4)
9.52 (3/8)
12.70 (1/2)
15.88 (5/8)
19.05 (3/4)
6.6.2. 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 mate-
rial will harden, making it dif¿ cult to bend or stretch them
any more.
• Do not bend or stretch the pipes more than three times.
• To prevent breaking of the pipe, avoid sharp bends.
• If the pipe is bent repeatedly at the same place, it will
break.
6.6.3. Pipe connection
• Be sure to install the pipe against the port on the indoor
unit correctly. If the centering is improper, the À are nut
cannot tighten smoothly. If the À are nut is forced to turn,
the threads will be damaged.
• Do not remove the À are nut from the indoor unit pipe until
immediately before connecting the connection pipe.
• Hold the torque wrench at its grip, keeping it at a right
angle with the pipe, in order to tighten the À are nut cor-
rectly.
• Tighten the flare nuts with a torque wrench using the
specified tightening method. Otherwise, the flare nuts
could break after a prolonged period, causing refriger-
ant to leak and generate hazardous gas if the refrigerant
comes into contact with a À ame.
• Connect the piping so that the control box cover can eas-
ily 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.
En-8
9332279030-04_IM.indb 8 9332279030-04_IM.indb 8
Dimension B
[mm (in.)]
9.1 (11/32)
13.2 (17/32)
16.6 (21/32)
19.7 (25/32)
24.0 (15/16)
Width across flats of
Flare nut
[mm (in.)]
17 (21/32)
22 (7/8)
26 (1-1/32)
29 (1-5/32)
36 (1-13/32)
CAUTION
CAUTION
CAUTION
When the flare nut is tightened properly by your hand, hold
the body side coupling with a wrench, then tighten with a
torque wrench. (See the table below for the flare nut tighten-
ing torques.)
Torque wrench
Indoor unit pipe
(Body side)
Flare nut [mm (in.)] Tightening torque [N·m (lb·ft)]
6.35 (1/4) dia.
9.52 (3/8) dia. 32 to 42 (23.6 to 31.0)
12.70 (1/2) dia. 49 to 61 (36.1 to 45.0)
15.88 (5/8) dia. 63 to 75 (46.5 to 55.3)
19.05 (3/4) dia. 90 to 110 (66.4 to 81.1)
Tighten with two wrenches.
Holding wrench
Flare nut
Connection pipe
16 to 18 (11.8 to 13.3)
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