DC Inverter U-match Series Cassette Type Unit
18
Tighten the clamp until the screw head is less
then 4mm from the hose.
Metal clamp
Drain hose (accessory)
Grey tape (accessory)
Insulate the pipe clamp and the drain hose using heat
insulation sponge.
Metal clamp (accessory)
Insulation sponge (accessory)
(3). When unifying multiple drain pipes, install the pipes as Fig.23. Select converging drain
pipes whose gauge is suitable for the operating capacity of the unit.(take the cassette type
unit for example)
100 mm
T-joint converging drain pipes
0~675 mm
T-joint converging drain pipes
0~1000mm
Fig.23
(4).
When the drain hose cannot keep a sufficient gradient, it is necessary to fit a riser pipe
(field supplied) to it.
(5).
If the air flow of indoor unit is high, this might cause negative pressure and result in return
suction of outdoor air. Therefore, U-type water trap shall be designed on the drainage side
of each indoor unit.(Fig.24)
(6). Install one water trap for each unit.
(7). Installation of water trap shall consider easy cleaning in the future.
Fig.24 Fig.25 Fig.26
(8). Connection of drainage branch pipe to the standpipe or horizontal pipe of drainage main
pipe
The horizontal pipe cannot be connected to the vertical pipe at a same height. It can be
connected in a manner as shown below:
NO.1: Attach the 3-way connection of the drainage pipe joint as shown in Fig.27.
NO.2: Attach the drain elbow as shown in Fig.28.
NO.3: Attach the horizontal pipe as shown in Fig.29.
