En-5
Pipe outside diameter
[in. (mm)]
Dimension A [in. (mm)]
Dimension B
0 (0)
-0.015 (-0.4)
[in. (mm)]
Flare tool for R410A,
clutch type
1/4 (6.35)
0 to 0.020
(0 to 0.5)
3/8 (9.1)
3/8 (9.52)
1/2 (13.2)
1/2 (12.70)
5/8 (16.6)
5/8 (15.88)
3/4 (19.7)
3/4 (19.05)
15/16 (24.0)
When using conventional (R22)
fl
are tools to
fl
are R410A pipes, the dimension A should
be approximately 0.02 in. (0.5 mm) more than indicated in the table (for
fl
aring with R410A
fl
are tools) to achieve the speci
fi
ed
fl
aring. Use a thickness gauge to measure the dimen-
sion A. It is recommended that a R410A
fl
aring tool is used.
Width across
fl
ats
Pipe outside diameter
[in. (mm)]
Width across flats of Flare
nut [in. (mm)]
1/4 (6.35)
11/16 (17)
3/8 (9.52)
7/8 (22)
1/2 (12.70)
1 (26)
5/8 (15.88)
1-1/8 (29)
3/4 (19.05)
1-7/16 (36)
4.3.2. Bending pipes
The pipes are shaped by your hands or pipe bender. 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 dif
fi
cult
•
to bend or stretch them any more. Do not bend or stretch the pipes more than 3 times.
CAUTION
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
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.
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.
Tighten the
fl
are nuts with a torque wrench using the speci
fi
ed 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.
Connection pipe
Torque wrench
Indoor unit pipe
(Body side)
Tighten with 2 wrenches.
Holding wrench
Flare nut
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.
Flare nut [in. (mm)]
Tightening torque [lbf·ft. (N·m)]
1/4 (6.35) dia.
11.8 to 13.3 (16 to 18)
3/8 (9.52) dia.
23.6 to 31.0 (32 to 42)
1/2 (12.70) dia.
36.1 to 45.0 (49 to 61)
5/8 (15.88) dia.
46.5 to 55.3 (63 to 75)
3/4 (19.05) dia.
66.4 to 81.1 (90 to 110)
4.4. Installing heat insulation
Install the coupler heat insulation after completing the refrigerant leak check (for details,
refer to the Installation Manual for the outdoor unit).
Coupler heat
insulation
(Accessories)
Cable tie (Large)
(Accessories)
Heat insulation
Cover this portion with
heat insulation.
CAUTION
There should be no gaps between the insulation and the product.
5. INSTALLING DRAIN PIPES
]
• Use general hard polyvinyl chloride pipe ø 3/4 in. [I.D.], ø 1-1/16 in. [O.D.] and connect
it with adhesive (polyvinyl chloride) so that there is no leakage.
• The position of the installed drain pipe should have a downward gradient of 1/100 or
more.
• To prevent the pipe from freezing, use a heat insulation material as needed.
Position of drain piping
4-1/4 (108)
5-1/2 (139)
Main drain port
Safety drain port
1-5/8 (41)
4-13/16 (123)
8-3/16 (208)
14 (356)
14-5/8 (371)
Unit: in. (mm)
Pipe size
Drain pipe
• For main drain port
• For safety drain port
Φ
3/4 in. (19 mm) [I.D.],
Φ
1-1/16 in. (27 mm) [O.D.]
• This product has drain ports in 2 locations. Follow the procedure in the
fi
gure to connect
drain hose and drain pipes to each of them.
INSTALL THE DRAIN HOSE TO THE MAIN AND SAFETY
DRAIN PORT
Working procedure
(1) Install the attached drain hose to the main and safety drain port of the body. Install
the hose band from the top of the hose within the graphic display area. Secure
fi
rmly
with the hose band.
(2) Use vinyl adhesive agent to glue the drain piping (PVC pipe) [
Φ
3/4 in. (19 mm) I.D.
Φ
1-1/16 in. (27 mm) O.D.] which is prepared on site or piping socket. (Apply color
adhesive agent evenly until the gauge line and seal)
(3) Check the drainage.
(4) Install the heat insulation.
(5) Use the attached heat insulation to insulate the drain port and band parts of the body.
Drain hose
(Accessories)
3/8 to 9/16
(10 to 15)
Hose Band
(Accessories)
Soft PVC side
Ensure there is no space
Drain pan
Unit: in. (mm)
9373870135-03_IM.indb Sec1:5
9373870135-03_IM.indb Sec1:5
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10/24/2013 2:57:12 PM
