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5. LAYOUT THE DRAIN PIPE
5.1 Install the drain pipe of the indoor unit
1) The drainpipe can use PVC pipe. (The external diameter about
37-39 mm. The inner diameter is 32 mm.)
2) Joint drainpipe connector to the end of the water pumping pipe.
Fix the drainpipe together with the water outflow pipe and thermal
insulation tube by clasping the water outflow pipe (attached).
CAUTION
Don’t force water-pumping pipe or you might crack it.
CAUTION
The joints in drain system must be sealed to avoid water leaks.
9) The height from the floor to the end of the drainpipe or the
bottom of drain slot must more than 50 mm. Don’t immerse the
end of the drainpipe or the bottom of the drain slot into water.
When draining condensation, bend the drainpipe into a U-shaped
hydroseal to avoid odor transferring from the drainpipe to indoors.
0.8-1.0 m
a
>1.0 m
b
Fig.5-1
Gradient: >1/100
CAUTION
3) The water-pumping pipe and drainpipe from the main body must
be evenly wrapped with insulation tube and bound tightly with a
band to stop air from getting in and also coagulation.
4) Prevent water backflow into unit during shutdown. The drain
pipe must be placed downwards and water drained to outdoors
(drain side). The gradient of the drain pipe should be higher than
(1/100), without salination and water remaining. (Refer to Fig.5-1 a)
5) When connecting the drainpipe, do not drag the pipe attached to
the main unit. For this, arrange bearing points at every 0.8 to 1.0
meter to avoid bending the pipe (See Fig.5-1 b).
6) When connecting a length of drainpipe, apply protective tube to
wrap its indoor parts to connect it tightly.
7) If the drainpipe outlet is higher than the pumping connective pipe
of the main body, the drainpipe must be arranged upwards
vertically by using connective assembly of the water outlet for
vertical bending. The height of the drainpipe must be set to the
defrosting pan surface no more than 1000 mm. Too much backflow
during shutdown would lead to overflow (Refer to Fig.5-2).
8) Based on the actual requirements for bending the pipe, use the
connective assembly of the water outlet in the terminal box for pipe
layout.
b
50-100 mm
50-100 mm
50-100 mm
Max. 1000 mm
≤200 mm
C200 mm
≤200 mm
Drainpipes from many units converge and discharge water to and from the main drainpipe.
Fig. 5-2
Connective assembly of the water outlet
Main drainpipe
Gradient: 1/50-1/100
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