9. Installation
Indoor unit
Compact
24
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Ceiling concealed duct - Middle static pressure(2)
Indoor Units
3) Indoor unit drain piping
①
Drain piping must have down-slope (1/50 to 1/100): be
sure not to provide up-and-down slope to prevent rever-
sal flow.
②
During drain piping connection, be careful not to exert
extra force on the drain port on the indoor unit.
③
The outside diameter of the drain connection on the
indoor unit is 32mm (1-1/4inch).
Piping material:
Polyvinyl chloride pipe inner diameter
Ø 25.4mm (1inch) and pipe fittings
4) Caution for gradient of unit and drain piping
- Without drain pump:
• Always lay the drain with downward inclination (1/50 to
1/100). Prevent any upward flow or reverse flow in any part.
• 5mm(3/16inch) or thicker formed thermal insulation shall
always be provided for the drain pipe.
Correct method
• Lay the drain hose with a downware inclination so water
will drain out.
Wrong method
- With drain pump
①
Possible drain head height is upto 700mm (27-9/16inch).
So the drain head should be below 700mm (27-9/16inch).
②
Keep the drain hose downward upto 1/50~1/100 inclina-
tion. Prevent any upward flow or reverse flow in any part.
③
5mm(3/16inch) or thicker insulation should be provided
for the drain pipe.
27 9/16 inch ~ 700mm
(27-9/16 inch)
Drain Pipe
Drain Pump
1/50~1/100
1/50~1/100
1/50~1/100
1/50~1/100 slope
Hanger
distance
Hanger Bracket
Max 700mm
Flexible drain hose
Insulation
Metal
clamp
Max 300mm
1~15m
Drainage hole
Make sure to be closed.
Unit
Drainage pipe
(Local supply)
Thermal insulator
(Local supply)
1/50~1/100
1/50~1/100
1. Decline Installation of indoor unit is very important for
the drain of the duct type air conditioner.
2. Minimum thickness of the insulation for the connecting
pipe should be 5mm(3/16inch).
CAUTION
1/50~1/100
Attached drain hose
Bottom of unit
Downward 1/50~1/100 or more
50mm
or more
50mm
or more
Approx 2~3mm
Pipe clamp
Maintenance
drain port
Indoor unit
