DC INVERTER MULTI VRF INSTALLATION
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18). All the condensate pipes must be installed at a distance over 500mm from the electric
box of the unit.
8.3 Installation of drainage hose for different types of indoor unit
1) Duct-type Indoor Unit (Including General Static Pressure and Low Static Pressure)
a. Installation of drainage hose
¾ The diameter of drainage hose shall be equal to or higher than the diameter of
connection pipe. (PVC pipe: Dimension: Outer diameter 25mm, 32mm)
¾ The drainage hose shall be short and has a down gradient of 1/100 at least, thus to
avoid air bag.
¾ To ensure that the drainage hose will not be bent and has enough gradient, a distance of
1 ~ 1.5m shall be kept between the hanger frames.
¾ Use drainage hose and clamp.
Insert the drainage hose to the root. From the middle of white tape, tighten the clamp until the
tightening distance to the screw head is shorter than 4mm.
A. For thermal isolation, use sealing tape to wrap the drainage hose and clamp.
B. The indoor drainage hose shall be thermally insulated.
C. To prevent foreign articles from entering the pipe, please minimize the bend of pipeline, thus
to ensure cleanliness of the drainage elbow.
D. The drainage hose must be wrapped with thermal insulation tube, thus to avoid
condensing on the outer surface of drainage hose . See below for the thickness of thermal
insulation tube.
Gradient over 1/100
Clamp
Sponge (grey)
Drainage hose
Big sponge (accessory)
Clamp (accessory)
Below 4mm
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