En-6
Indoor unit
Indoor unit
Indoor unit
Coupler heat insulation (Large)
(Accessories)
Connection pipe (Gas)
Connection pipe (Small) (Liquid)
Coupler heat insulation (Small)
(Accessories)
Cable tie (Extra large)*
(Accessories)
No gap
Coupler heat insulation
Cable tie (Large)
(Accessories)
Connection pipe (Gas)
Connection pipe (Liquid)
Vinyl tape
* When using an Auxiliary pipe (Accessories), make sure that 2 pieces of fasteners used
is insulated in the same way.
5. INSTALLING DRAIN PIPES
Use general hard polyvinyl chloride pipe and connect it with adhesive (polyvinyl chloride)
so that there is no leakage.
Always heat insulate the indoor side of the drain hose.
Use a drain pipe that matches the size of the drain hose.
• 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.
• Always heat insulate (8 mm or over thick) the indoor side of the drain pipe.
O.D.
Drain pipe
32 mm (VP25)
Drain pipe
Arrange the drain pipe lower
than this portion.
Supporter
1.5 to 2 m
GOOD
GOOD
Wave
End in water
Lifted up
PROHIBITED
CAUTION
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.
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.
Connection pipe
Torque wrench
Indoor unit pipe
(Body side)
Tighten with 2 wrenches.
Holding wrench
Flare nut
Flare nut [mm (in.)]
Tightening torque [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)
CAUTION
Be sure to install the pipe against the port on the indoor unit and the outdoor unit
correctly. If the centering is improper, the
fl
are nut cannot tightened 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.
Do not use mineral oil on
fl
ared part. Prevent mineral oil from getting into the system
as this would reduce the lifetime of the units.
1
1
4.4. Installing heat insulation
Install the heat insulation material after performing a refrigerant leak check (see the Instal-
lation Manual for the outdoor unit for details).
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 af
fi
xing the coupler heat insulation, secure it with 2 cable ties, one on each end of
the insulation.
• Make sure that the Cable ties overlap the heat insulation pipe.
And
fi
nally
fi
x connection pipe (Liquid) to connection pipe (Gas) by rolling vinyl tape over
coupler heat insulation (Gas) and coupler heat insulation (Liquid).
CAUTION
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.
9367702107-02_IM.indb Sec1:6
9367702107-02_IM.indb Sec1:6
1/25/2013 3:51:36 PM
1/25/2013 3:51:36 PM
