AirStage ARUL14RLAV Instrukcja instalacji - Strona 9
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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
diffi cult to bend or stretch them any more.
•
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 fl are nut cannot tighten smoothly. If the fl are nut is forced to turn, the
threads will be damaged.
Do not remove the flare 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 fl are nut correctly.
Tighten the flare nuts with a torque wrench using the specified tightening method.
Otherwise, the fl are nuts could break after a prolonged period, causing refrigerant to
leak and generate hazardous gas if the refrigerant comes into contact with a fl ame.
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 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.)
Torque wrench
Indoor unit pipe
(Body side)
Flare nut [in. (mm)]
1/4 (6.35) dia.
3/8 (9.52) dia.
1/2 (12.70) dia.
5/8 (15.88) dia.
3/4 (19.05) dia.
4.4. Installing heat insulation
Install the heat insulation material after performing a refrigerant leak check (see the In-
stallation 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 insulation, wrap both end with vinyl tape so that there
is no gap.
• After affi xing the coupler heat insulation, secure it with 2 binders (large), one on each
end of the insulation.
• Make sure that the binders overlap the heat insulation pipe.
Coupler heat
insulation
(Accessories)
Binder (Large)
(Accessories)
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.
CAUTION
CAUTION
Tighten with 2 wrenches.
Holding wrench
Flare nut
Connection pipe
Tightening torque [lbf·ft. (N·m)]
11.8 to 13.3 (16 to 18)
23.6 to 31.0 (32 to 42)
36.1 to 45.0 (49 to 61)
46.5 to 55.3 (63 to 75)
66.4 to 81.1 (90 to 110)
Cover this portion with
heat insulation.
Heat insulation
CAUTION
5. INSTALLING DRAIN PIPES
Do not insert the drain piping into the sewer where sulfurous gas occurs. (Heat
exchange 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
transparent drain port and the drain piping fi nal 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)
5.1A. When drain pump is used
• Use general hard polyvinyl chloride pipe ø 3/4 in. (19 mm) [I.D.], ø 1-1/16 in.(27 mm)
[O.D.] .
• 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.
Locally arranged pipe
Max.11-13/16 in.
(300 mm)
Observe the following procedures to construct centralized drain pipe fi ttings.
[O.D.1-5/16 in.(33 mm)] or more
27-9/16 in.
(700 mm)or less
WARNING
CAUTION
Gap of 5' to 6' 6" (1.5 to 2 m)
Supporter
[O.D.1-1/16 in.
(27 mm)] or more
27-9/16 in.
(700 mm) or less
Horizontal or
upward gradient
Good
Rise
Air bleeding
Trap
Prohibited
Downward gradient 1/100 or more
En-8