19
Installation
Water drain pipes from multiple units are connected to the main drain pipe that flows into the waste water pipes.
50~100mm
50~100mm
50~100mm
A B C
< 200 mm
< 600 mm
< 200 mm
< 200 mm
A Water drain pipe fittings
B Main water drain pipe
C 1/100 slope or more
Fig. 20
7 The end of the drain pipe must be more than 50 mm
off the ground or base of the drain slot. Moreover, do
not put the pipe in the water.
l
WARNING
– When using an extension for the drainage
pipe, tighten the connection on the inside
with an additional protection pipe to stop it
from coming loose.
– The drainage pipe must slope by at least
1/100 to prevent the water from flowing back
into the air conditioner.
– To stop the pipe from bending, fix the
suspension elements every 1-1.5 m.
– If the drainage pipe outlet is higher than the
pump fitting on the unit body, use a lifting
pipe for the discharge outlet of the indoor
unit. The lifting pipe must be installed no
more than 100 cm from the false ceiling and
no further than 20 cm from the unit. Incorrect
installation can cause the water to flow back
into the unit.
– To prevent air bubbles from forming, keep
the drainage pipe horizontal or slightly
inclined upwards (<75 mm).
CHECK DRAINAGE
Before the test, ensure that the water drain flows smoothly
and check that each connection is properly sealed.
Run the water drain test in the new room before
completing the ceiling.
1 Connect the power supply and set the air conditioner
to operate in cooling mode. Check the sound of the
drainage pump in operation, and whether the water
adequately drains from the discharge water outlet.
2 Switch off the air conditioner and after 3 minutes
check for any abnormal situations. If the drainage pipe
remains exposed for any reason, too much water may
flow back and cause a warning light on the electrical
panel to flash or the water tank to overflow
3 Continue to add water until the water level exceeds
the alarm level for 3 minutes, the appliance goes into
alarm and switches off. A protection function prevents
the air conditioner from being operated for about
3 minutes when it is restarted immediately after being
switched off
4 Switch it off, remove the water and put the water
control cover back in place.
a
CAUTION DANGER
– The drain cap at the base of the unit’s casing is
used to drain the water accumulated in the drain
pan should the air conditioner malfunction.
When the air conditioner is operating normally,
make sure that the drain cap is closed properly
to prevent water from leaking.
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