LG MULTI V 2 Series Installation Manual page 11

1. Install declination of the indoor unit is very important for the drain of the duct type air conditioner.
2. Minimum thickness of the insulation for the connecting pipe shall be 5mm.
• The unit must be horizontal or declined to the drain hose connected when finished
installation.
Drain Pump
Drainage hole
unuse
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.
CAUTION
Front of view
Ceiling
Drain Pump
Drainage hole
use
Lay the drain hose with a downware
inclination so water will drain out.
Unit
Make sure to be closed.
• Upward routing not
allowed
INCORRECT
Applied U-Trap Dimension
A ≥ 70mm
B ≥ 2C
C ≥ 2 x SP
SP = External Pressure
(mmAq)
Ex) External Pressure
= 10mmAq
A ≥ 70mm
B ≥ 40mm
C ≥ 20mm
Installation
Thermal insulator
(Local supply)
Drainage pipe
(Local supply)
Drainage hole
B
C
U-Trap
A
Installation Manual 11