Connect The Drain Pipe - Lennox COMFORT Installation Manual

8. CONNECT THE DRAIN PIPE

1. Install the drainpipe of the indoor unit
• You can use a polyethylene tube as the drainpipe (out-dia.37-39mm, in-dia.32mm). It could be
bought at local market or from your dealer.
• Set the mouth of the drainpipe onto the root of the body's pump-pipe, and clip the drainpipe and the
out-let pipe sheath (fittings) together firmly with the out-let pipe clasp (fitting). CAUTIONS: Use your
strength carefully to prevent the pump-pipe from breaking.
• The body's pump pipe and the drainpipe (especially the indoor part) should be covered evenly with
the out-let pipe sheath (fittings) and be bound tightly with the constrictor to prevent condensation
caused by entered air.
• To prevent water from flowing backwards into the air conditioner while the air conditioner stops,
please lean the drainpipe down toward outdoor (outlet-side) at a degree of over 1/50. And please
avoid any bulge or water deposit. (Refer to Chart 28.a)
• Do not drag the drainpipe violently when connecting to prevent the
body from being pulled. Meanwhile, one support-point should be set
every 1~1.5m to prevent the drainpipe from yielding (Refer to Chart
28.b). Or you can tie the drainpipe with the connecting pipe to fix
it.(Refer to Chart 28.c)
• In the case of prolonged drainpipe, you had better tighten its indoor
part with a protection tube to prevent it from loosing.
• If the outlet of the drainpipe is higher than the body's pump joint, the
pipe should be arranged as vertically as possible. And the lift
distance must be less than 200mm, otherwise the water will overflow
when the air conditioner stops.(Refer to Chart 29)
2. Drainage test
• Check whether the drainpipe is unhindered
• New built house should have this test done before
paving the ceiling.
1) Remove the test cover, and stow water of about
2000ml to the water receiver through the stow
tube. (Refer to Chart 30)
2) Turn on the power, and operate the air conditioner
under the "COOLING" mode. Listen to the sound
of the drain pump. Check whether the water is
discharger well (a lag of 1min is allowed before
discharging, according to the length of the drain
pipe), and check whether water leaks from the
joints.
• The end of the drainpipe should be over 50mm
higher than the ground or the bottom of the
drainage chute, and do not immerse it in water.
If you discharge the water directly into sewage,
be sure to make a U-form aquaseal by bending
the pipe up to prevent the smelly gas entering
the house through the drain pipe.
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