Indoor Unit Drain Piping - LG B30AWYN7G5A Manual

Ceiling Concealed Duct
1. Installation

1.5 Indoor Unit Drain Piping

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 10mm.
• The unit must be declined to the drain hose connected when finished installation.
CORRECT
CAUTION FOR GRADIENT OF
UNIT AND DRAIN PIPING
1. Main drain
• Always 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
2. Safety drain
• There is no need to
provide a trap for the
safty drain. If the
safty drain pipe is
connected to the
main drain pipe,
make the connection
below the trap on the
main drain pipe.
6 _ Inverter
50Hz/R410A
INCORRECT
Drainage hole
Main drain pipe
Safety drain pipe
CAUTION
Ceiling
Safety drain hole
Drainage hole
Lay the drain hose with a downward
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
Main drain hole
Thermal insulator
(Local supply)
Drainage pipe
(Local supply)
Drainage hole
B
C
U-Trap
A