LG ABNW12GL5S1 Installation Manual page 9

!
CAUTION
• Install declination of the indoor unit is very important for the drain of the duct type air condi-
tioner.
• Minimum thickness of the insulation for the connecting pipe shall be 5mm.
Front of view
• The unit must be declined to the drain hose connected when finished installation.
Drainage hole
CORRECT
Caution for gradient of unit and drain piping
Lay the drain hose with a downward inclination so water will drain out.
• Always lay the drain with downward
inclination (1/100 to 1/50).
Prevent any upward flow or reverse flow
in any part.
• 10 mm 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
ofi ntake air filter.
Ceiling
1/100~1/50
INCORRECT
Unit
Make sure to be closed.
• Upward routing not
allowed
INCORRECT
Applied U-Trap Dimension
A ≥ 70 mm
B ≥ 2C
C ≥ 2 x SP
SP = External Pressure
(mmAq)
Ex) External Pressure
= 10 mmAq
A ≥ 70 mm
B ≥ 40 mm
C ≥ 20 mm
INSTALLATION OF INDOOR
Drainage hole
Thermal insulator
(Local supply)
Drainage pipe
(Local supply)
Drainage hole
C
A
9
B
U-Trap