Fujitsu 9363005011, Installation Manual

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4. CONNECTING AN INDOOR CAPILLARY TUBE
These instructions refer to the 30,000 and 36,000
BTU/h versions.
Installation Procedure
(1) Braze each part (connection pipe, indoor capillary
tube, and branch liquid pipe) as shown in Fig. 22.
(2) Wrap the two BR sheets around the indoor capillary
tube as shown in Fig. 23.
(3) Cover the indoor capillary tube and the branch liq-
uid pipe with insulation (Fig. 24) and affix the insula-
tion with tape.
(4) Secure the insulation using the binders (Fig. 25).
• If the joint pipe must be installed, refer to the instal-
lation installation manual for the outdoor unit for
details.
,, yy ,, yy
Fig. 21
Body side
Holding wrench
90°
Torque wrench
Fig. 22
Connection
pipe
Connection
pipe
Branch liquid pipe
Indoor unit
side
When the flare nut is tightened properly by your hand,
hold the body side coupling with a separate spanner,
then tighten with a torque wrench (Fig. 21).
Hold the torque wrench at its grip, keeping
it in the right angle with the pipe as shown
in Fig. 21, in order to tighten the flare nut
correctly.
Pipe Tightening torque
Small pipe (9.53 mm dia)
310 to 350 kgf • cm
(30.4 to 34.3 N • m)
Large pipe (15.88 mm dia)
750 to 800 kgf • cm
(73.5 to 78.4 N • m)
Large pipe (19.05 mm dia)
800 to 1,000 kgf • cm
(78.4 to 98 N • m)
Table 4 : Flare nut tightening torque
Indoor unit
side
Outdoor unit side
Indoor capillary
tube
Indoor capil-
lary tube
Brazing (all around)
Fig. 23
BR sheet
Connection pipe
Branch liquid pipe
Indoor
capillary tube
Fig. 24
Tape Tape
Fig. 25
Binder
After checking for gas leaks, insulate by wrapping
insulation around the two parts (large and small) of
the indoor unit coupling, using the coupler heat insu-
lation.
After installing the coupler heat insulation, wrap both
ends with vinyl tape so that there is no gap.
Secure both ends of the heat insulation material using
nylon fasteners.
• When using an auxiliary pipe, make sure that the
fastener used is insulated in the same way.
4. INSTALLING THE COUPLER HEAT INSULATION
Fig. 26
No gap
Coupler heat
insulation
Nylon fastener (small)
Nylon fastener (large)
Indoor unit
Coupler heat insulation
(small)
Connection pipe
(small)
Connection pipe
(large)
Coupler heat insulation (large)
Indoor unit