5-2. INDOOR UNIT
GENERAL RULES OF DRAIN PIPING
●
Install the drain pipe with downward slope (1/100 or more) and so there are no rises in the
pipe.
●
Use general hard polyvinyl chloride pipe (ø3/4 [I.D.] ; ø1-1/16 [O.D.]) and connect it with
adhesive (polyvinyl chloride) so that there is no leakage.
●
Support the drain pipe with supports each 60 to 78 in. (1.5 to 2 m)
●
Do not install any air vents or traps.
●
Always insulate the drain pipe to prevent condensation.
●
When connecting the drain hose to the indoor unit, use the accessory band. (Except
compact wall mounted type and wall mounted type)
COMPACT CASSETTE TYPE
11 in. (300 mm)
or less
Max. 27 in.
(700 mm)
Attached band
drain hose
(accessory)
Downward
slope 1/100 or
more
Horizontal or
upward gradient
ø3/4 [I.D.] ; ø1-1/16 [O.D.]
(Locally purchased)
60 to 78 in. (1.5 to 2.0 m)
Hanging tting
Downward gradient
1/100 or more
Air vent
Rise
Trap
Prohibited
●
Drain lift-up pipe restrictions:
(1) Lift-up height ≤ 27 in. (700 mm) (from ceiling)
(2) Drain hose (pipe) length ≤ 11 in. (300 mm) (between indoor unit and lift-up pipe)
●
When a dimensions exceed the above restrictions will cause water leakage.
- (06 - 53) -
SYSTEM
DESIGN
SYSTEM
DESIGN
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