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5.
INSTALLING DRAIN PIPES
•
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 (Ø 3/4 in. [I.D.]; Ø 1-1/16 in. [O.D.]) and con-
nect it with adhesive (polyvinyl 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 33-15/32 in. (850 mm) or less from
the ceiling within a range of 11-13/16 in. (300 mm) from the body. A rise dimension over
this range will cause leakage.
•
Set up the entire piping lines at the position 3-15/16 in. (100 mm) lower than the main
body drain port, and use the piping lines Ø 1 in. [I.D.]; Ø 1-5/16 in. [O.D.] or more with
the descending inclination to 1/100 or more.
11-13/16 in. (300 mm) or less
Ø 3/4 in. [I.D.];
Ø 1-1/16 in. [O.D.]
Attached drain hose
Attached band
Prohibitions
Prohibited: over mountain
Ø 3/4 in. [I.D.]; Ø 1-1/16 in. [O.D.]
Downward gradient 1/100 to 1/50
Ø 1 in. [I.D.]; Ø 1-5/16 in. [O.D.] or more
Downward gradient 1/100 or more
33-15/32 in. (850 mm) or less
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 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)
En-7
Downward gradient 1/100 or more
33-15/32 in. (850 mm) or less
Horizontal or
upward gradient
Prohibited: air bleeding
Prohibited: trap
4.9 to 6.6 ft. (1.5 to 2.0 m)
Hanging fi tting
WARNING
CAUTION
Working procedure
(1) Install the attached drain hose to the 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) which is prepared on
site.
(Apply color adhesive agent evenly until the gauge line and seal)
(3) Check the drainage. (See separate diagram)
(4) Install the heat insulation.
(5) Use the attached heat insulation to insulate the drain port and band parts of the body.
Install the knob
faces upward (Ac-
cessories)
Attached drain hose
heat insulation (Acces-
sories)
Attached heat
insulation
(a) Top view
Hose Band
3/16 ~ 13/32 in.
(5 ~ 10 mm)
25/32 in.
(20 mm)
(c) Top view
Make sure there are no gaps
Note: Check for drainage
Pour about 1 liter of water from the position shown in the diagram or from the airfl ow
outlet to the dew tray. Check for any abnormalities such as strange noises and whether
the drain pump functions normally.
Attached
hose band
Locally
arranged
vinyl pipe
Attached drain
hose (Acces-
sories)
(b) Side view
Applying area
of adhesive.
1-3/8 in.
(35 mm)
Gauge line
5/32 in.
(4 mm)
or less
(d) Hose opening view
Wind the attached heat insulation
around the hose band
Make sure the align-
ment is on top
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