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.
• The unit must be or declined to wards drain hose while installation.
Drainage hole
CORRECT
CAUTION FOR GRADIENT OF
UNIT AND DRAIN PIPING
• Alway lay the drain with downward inclination
(1/50 to 1/100).
Prevent any upward flow or reverse flow in any
part.
• 5mm or thicker formed thermal insulator shall
always be provided for the drain pipe.
CORRECT
• Install the P-Trap (or U-Trap) to prevent
a water leakage caused by the blocking
of intake air filter.
Drain Pipe
Drain Pump
CAUTION
Front of view
Ceiling
INCORRECT
INCORRECT
1/50~1/100
1/50~1/100
MAX 700mm
Drainage hole
Lay the drain hose with a downware
inclination so water will drain out.
Unit
Make sure to be closed.
Applied U-Trap Dimension
A ≥ 70mm
B ≥ 2C
C ≥ 2 x SP
SP = External Pressure
(mmAq)
C
Ex) External Pressure
= 10mmAq
A ≥ 70mm
A
B ≥ 40mm
C ≥ 20mm
Installation
Thermal insulator
(Local supply)
Drainage pipe
(Local supply)
Drainage hole
B
U-Trap
Service Manual 41