En-7
Connection pipe
Torque wre
Indoor unit pipe
(Body side)
nut
ng wrench
ith two wrenches.
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)
4.4. Installing heat insulation
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.
After checking for gas leaks, insulate by wrapping insula-
tion around the two 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.
Body
Be sure to overlap the
insulation
Coupler heat insulation
No gap
Coupler heat
insulation
5. INSTALLING DRAIN PIPES
Note
Install the drain pipe.
Install the drain pipe with downward gradient (1/50 to 1/100)
•
and so there are no rises or traps in the pipe.
Use general hard polyvinyl chloride pipe (VP25) [outside di-
•
ameter 32 mm (1-1/4”)] and connect it with adhesive (polyvi-
nyl chloride) so that there is no leakage.
When the pipe is long, install supporters.
•
Do not perform air bleeding.
•
Always heat insulate the indoor side of the drain pipe.
•
When desiring a high drain pipe height, raise it up to 700 mm
•
or less from the ceiling within a range of 150 mm from the
body. A rise dimension over this range will cause leakage.
Max. 700 mm
Trap
Support
1.5 to 2.0 m
150 mm or less
Rise
Trap
Air bleeding
150 mm or les
[Prohibitions]
NG
NG
NG
WARNING
Do not insert the drain piping into the sewer where sulfur-
•
ous 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.
CAUTION
Do not apply adhesive agent on the drain port of the
•
body. (Use the attached drain hose and connect the
drain piping.)
CAUTION
Must
fi
t tightly against body without any gap.
•
