LG MULTI F A3UW21GFA0

Heat pump 50Hz/R410A _ 16
2. Guideline for each installation process
Part 3 Design and installation
2.3.2 Drain pipe trap (only for high static duct)
- In case of duct high static pressure, the U trap maintains a positive pressure on the indoor side of the unit.
1) Models with drain pump
Indoor unit
Plug
U-Trap
B
A 70mm
B 4 x SP
SP = External Pressure
(mmAq)
Ex) External Pressure
= 10mmAq
A 50mm
B 40mm
<U-trap size calculations>
A
2) Models without drain pump
Flexible hose
Drain pump
PVC elbow
PVC
PVC
1/50~1/100 slope
Max. 700
300mm or less
[Unit : mm]
Common drain pipe
Polyethylene insulation 10t
PVC drain pipe
Metal clamp
Drain pan
Thermal insulation(bend area)
Flexible drain hose
Thermal insulation (drain pipe area)