10
English
7. DRAIN PIPING WORK
(1) Carry out drain piping.
Carry out drain piping so that drainage is ensured.
•
Select the piping diameter equal to or larger than
(except for riser) that of the connection piping (polyvi-
nyl chloride piping, nominal diameter 13/16 in. (25 mm),
outside diameter 1-1/4 in. (32 mm)).
•
Install the drain piping as short as possible with down-
ward inclination of 1/100 or more and without such that
air may not stagnate.
(Refer to Fig. 13)
(It may cause
abnormal sound such as bubbling noise.)
Downward
inclination of
1/100 or more
40-60 in.
(1-1.5 m)
Support
Good
Wrong
Fig. 13
CAUTION
If drain stagnates in the drain piping, the piping may be
clogged.
•
If sufficient downward inclination cannot be ensured,
carry out upward drain piping.
•
Install supports at a distance of 40-60 in. (1 to 1.5 m) so
that the piping may not deflect.
(Refer to Fig. 13)
•
Make sure to use the attached drain hose (2) and the
metal clamp (1).
Insert the drain hose (2) into the drain socket up to the
point where the socket diameter becomes larger.
Put the metal clamp (1) to the taped hose end and
tighten the metal clamp (1) with torque 0.9-1.1 lbf·ft.
(1.2-1.5 N·m).
Metal clamp (1)
(Accessory)
Tape
Indoor unit
Drain hose (2)
(Accessory)
Fig. 14
CAUTION
•
Do not tighten the metal clamp (1) with the torque more
than the specified value.
The drain hose (2), the socket or the metal clamp (1) may
be damaged.
•
Wrap the vinyl tape around the end of the metal clamp
(1) so that the sealing material (Large) (6) to be used at
the next process may not be damaged with the clamp
end or bend the tip of the metal clamp (1) inward as
shown.
(Refer to Fig. 15)
<In case of sticking vinyl tape>
Tightened part
appro
x.
90°
Stick vinyl tape without
tearing the sealing
material (Large) (6).
Vinyl tape
<In case of bending the tip>
Bend the tip without tearing the
sealing material (Large) (6).
Tightened part
appro
x.
90°
Fig. 15
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2022/08/03 10:36:10
