INS-42
DUAL, TRIPLE, POKER DC Inverter : 4. Installation
Multi Liberty
DC Inverter
4. Drain piping
4.1 Installation of drain pipe for Indoor Unit
Caution:
1) Condensate drain piping must be properly insulated by close cells’ insulating material of suitable thickness,
near connection point on Indoor Unit and on the first portion (about 1m). This precaution is for avoiding
condensation forming on drain piping‘s outside.
2) Connection of drain hose on this kind of Indoor Units is at the bottom, on right side (by frontally watching air
conditioner). Drain hose’s connection can be reached by bottom side of Unit’s body, with no need of removing
frontal grille nor any other panel of Indoor Unit.
3) For drain piping, please use a PVC semi-rigid pipe of commercial type (VP16).
4) When installing piping on drain connection on Indoor Unit, take care not to force excessively in order not to
damage the connection itself.
5) Keep a slope of 1/50~1/100 along whole piping path. Pipe must not be wavy or higher than specified.
6) It is recommended to reduce as much as possible drain piping lenght and to prepare, if needed, special
supporting structures which prevent piping from bending under its own weight.
7)
Do not lead drain piping to manholes where there could be toxic, harmful or inflammable gas. This gas could
enter installation rooms through drain piping, thus being a danger for health and safety of User (risk of
poisoning or lack of oxygen). Moreover, heat exchanger may corrode and bad smells may exhale.
8) For properly installation, please refer to the Figures below.
4.2 Drain hose test
1) Pour water inside drain piping, and check if it flows down properly.
2) Take care that drain piping is not pressed along its path.
3) In new buildings, drain hose test must be carried out before laying of superstructures as panels, air spaces,
etc.
Insulating sleeve
Drain pipe
Drain pipe extension
During laying of drain pipe, please avoid the most common errors, shown in the Figure below.
Higher than
specified
The drain hose
tip is in water
Wavy
The gap to the ground
is 6cm or less
The drain hose tip
is in the gutter
> 6cm
Bad smells
NO
NO
NO
NO
NO
