LG Multi F A2UW14GFA0 Engineering Product Data Book page 311

2. Guideline for each installation process
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
Max. 700
2) Models without drain pump
A 70mm
B 4 x SP
SP = External Pressure
(mmAq)
Ex) External Pressure
= 10mmAq
A
A 50mm
B 40mm
<U-trap size calculations>
Indoor unit
Plug
300mm or less
PVC elbow
Drain pump
Polyethylene insulation 10t
PVC drain pipe
Metal clamp
Flexible drain hose
Drain pan
Thermal insulation(bend area)
B
U-Trap
PVC
1/50~1/100 slope
PVC
Flexible hose
Common drain pipe
[Unit : mm]
Thermal insulation (drain pipe area)
Heat pump 50Hz/R410A
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