Installing Heat Insulation; Installing Drain Pipes - Fujitsu Airstage AUXS018GLEH Installation Manual

(1) Detach the caps and plugs from the pipes.
(2) Center the pipe against the port on the indoor unit, and then turn the flare nut by
hand.
Connection pipe (Gas)
Connection pipe (Liquid)
(3) When the flare nut is tightened properly
by your hand, hold the indoor unit side
coupling with a separate spanner, then
tighten with a torque wrench. (See the
table below for the flare nut tightening
torques.)
Flare nut Tightening torque
[mm (in)] [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)

4.4. Installing heat insulation

After checking for gas leaks (refer to the Installation Manual of the outdoor unit), perform
this section.
Install heat insulation around both the large (gas) and small (liquid) pipes. Failure to do
so may cause water leaks.
After checking for gas leaks,
insulate by wrapping insula-
tion around the 2 parts (gas
and liquid) of the indoor unit
coupling, using the Coupler
heat insulation.
After installing the Coupler
heat insulation, wrap both ends
with vinyl tape so that there is
no gap.
Must fit tightly against indoor unit without any gap.

5. INSTALLING DRAIN PIPES

Do not insert the drain piping into the sewer where sulfurous gas occurs. (Heat ex-
change erosion may occur)
Insulate the parts properly so that water will not drip from the connection parts.
Check for proper drainage after the construction by using the visible portion of transpar-
ent drain port and the drain piping final outlet on the indoor unit.
Do not apply adhesive agent on the drain port of the indoor unit. (Use the attached drain
hose and connect the drain piping)
• Install the drain pipe with downward gradient (1/100 to 1/50) and so there are no rises or
traps in the pipe. Unsmooth draining caused by accumulated water flow in the pipe may
cause clogged drain.
• Use general hard polyvinyl chloride pipe (VP25) [outside diameter 32 mm].
• When the pipe is long, install supporters.
• Do not perform air bleeding. Drainage may
be blown out.
• If it is impossible to have sufficient gradient
of pipe, perform drain lift-up.
En-5
Torque
wrench
Indoor unit pipe
Connection pipe
(Body side)
CAUTION
Cable tie (large)
(accessories)
Coupler heat
insulation
(accessories)
Indoor
unit
Coupler heat
Be sure to overlap
insulation
the insulation
CAUTION
WARNING
CAUTION
Pipe size
Drain pipe VP25 (O.D. 32 mm)
PROHIBITED:
When lifting up drain:
• Height of inclined pipe should be less than 850 mm from the ceiling. A rise dimension
Tighten with 2 over this range will cause leakage.
wrenches.
• Lift up the pipe vertically at the position of 300 mm or less from the unit.
Holding
wrench
Flare nut
VP25 (O.D. 32 mm) local
arrangement
*1: Install the drain hose horizontally or with a slight upward gradient so air pocket is not
generated in the drain pipe. The air pocket may cause noise occurred due to water
backfl ow when the drain pump is stopped.
850 mm or less
Working procedure
No gap
(1) Be sure to use supplied Drain hose ① and Hose band ②.
Drain hole
Hanging fittings
VP25 (O.D. 32 mm)
Downward gradient 1/100 to 1/50
Rise Trap
300 mm or less
VP30 (O.D. 38 mm) or more Downward gradient
1/100 to 1/50
② Hose band (accessories)
Hose band
4 mm or less
20 mm
① Drain hose
Fasten the Hose band ② at the position where horizon-
tal against earth (ground).
The Hose band ② must be positioned at the right side
of the Drain hose ① as in the figure.
1.5 to 2 m
Air bleeding
Downward gradient 1/100 to 1/50
850 mm or less
Horizontal or upward
gradient (*1)
① Drain hose (accessories)
Hard PVC side
② Hose band