Installing Heat Insulation; Installing Drain Pipes; Arxk***Glgh Model - Fujitsu AIRSTAGE ARXK007GLFH Installation Manual

4.3.1. Flaring
Use special flare tool exclusive for R410A.
(1) Cut the connection pipe to
the necessary length with a
pipe cutter.
(2) Hold the pipe downward so
that cuttings will not enter the
Die
pipe and remove any burrs.
(3) Insert the flare nut (always
use the flare nut attached to
the indoor and outdoor units
(or RB unit) respectively)
onto the pipe and perform
the flare processing with a
flare tool. Use the special
R410A flare tool. Leakage of
refrigerant may result if other
flare nuts are used.
(4) Protect the pipes by pinching
them or with tape to prevent
dust, dirt, or water from
entering the pipes.
When using conventional (R22)
flare tools to flare R410A pipes, the
dimension A should be approxi-
mately 0.5 mm more than indicated
in the table (for flaring with R410A
flare tools) to achieve the speci-
fied flaring. Use a thickness gauge
to measure the dimension A. It is
recommended that a R410A flaring
tool is used.
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 difficult
to bend or stretch them anymore.
• Do not bend or stretch the pipes more than 3 times.
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
Be sure to install the pipe against the port on the indoor unit correctly. If the centering
is improper, the flare nut cannot tighten smoothly. If the flare nut is forced to turn, the
threads will be damaged.
Do not remove the flare nut from the indoor unit pipe until immediately before connect-
ing the connection pipe.
Hold the torque wrench at its grip, keeping it at a right angle with the pipe, in order to
tighten the flare nut correctly.
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.
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. (Refer to the following table 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)
Check if [L] is
flared uniformly
and is not cracked
or scratched.
Pipe
Dimension A
Pipe outside [mm]
Dimension
diameter (Flare tool for
B
[mm (in)] R410A, clutch
type)
6.35 (1/4)
9.52 (3/8)
12.70 (1/2) 0 to 0.5
15.88 (5/8)
19.05 (3/4)
Pipe outside Width across
Width across
diameter flats of flare nut
[mm (in)] [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
CAUTION
CAUTION
Tighten with 2
wrenches.
Flare nut
Torque
wrench
Indoor unit pipe
Connection pipe
(body side)

4.4. Installing heat insulation

Install the heat insulation material after performing a refrigerant leak check (refer to the
installation manual for the outdoor unit for details).
4.4.1. Coupler heat insulation
• Insulate by the coupler heat insulation
(accessories) around the gas pipe and
liquid pipe of indoor side.
• After installing the coupler heat insula-
tion, wrap both end with vinyl tape so
that there is no gap.
• After affixing the coupler heat insulation,
secure it with 2 cable ties (large), one on
each end of the insulation.
• Make sure that the cable ties overlap the
0
[mm]
-0.4
heat insulation pipe.
9.1
13.2
16.6
After checking for gas leaks (refer to the Installation Manual of the outdoor unit), per-
19.7
form this section.
24.0
Install heat insulation around both the large (gas) and small (liquid) pipes. Failure to do
so may cause water leaks.
flats

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 body.
Do not apply adhesive agent on the drain port of the body.
(Use the attached drain hose and connect the drain piping)

5.1. ARXK***GLGH model

• Use general hard polyvinyl chloride pipe (VP25) [outside diameter 32 mm].
• Do not perform a rise, trap and air bleeding.
• Provide a downward gradient (1/100 or more).
• Provide supporters when long pipes are installed.
• Use an insulation material as needed, to prevent the pipes from freezing.
• Install the pipes in a way that allows for the removal of the control box.
5.1.1. When drain pump is used
GOOD
Holding
PROHIBITED
wrench
Observe the following procedures to construct centralized drain pipe fittings.
700 mm
or less
Coupler heat
insulation
(accessories)
Cable tie (large)
(accessories)
CAUTION
WARNING
CAUTION
Gap of 1.5 to 2 m
Locally arranged pipe
VP25 [O.D
Max. 300 mm
32 mm or more]
700 mm or less
Horizontal or
Drain hose (accessories)
upward gradient
Air bleeding
Trap
Drain hose is not used
VP30 or more [O.D 38 mm or more]
Downward gradient 1/100 or more
Cover this portion with
heat insulation.
Heat insulation
Supporter
Rise
En-6