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40MBFAQ: Installation Instructions
Step 5 - Connect the Drain Hose
The drainpipe is used to drain water away from the unit. An improper
installation may cause unit and property damage.
CAUTION
Insulate all piping to prevent condensation, which could lead to water
damage.
If the drainpipe is bent or installed incorrectly, water may leak and cause a
water-level switch malfunction.
In the HEAT mode, the outdoor unit discharges water. Ensure that the
drain hose is placed in an appropriate area to avoid
water damage and slippage.
DO NOT pull the drainpipe forcefully; doing so may disconnect it.
NOTE ON PURCHASING PIPES: Installation requires a
polyethylene tube (exterior diameter = 1-1/2" (3.8cm),
interior diameter = 1-1/4" (3.2cm), which can be obtained
at your local hardware store or dealer.
1. Cover the drainpipe with heat insulation to prevent condensation
and leakage.
2. Attach the mouth of the drain hose to the unit's outlet pipe. Sheath
the mouth of the hose and clip it firmly with a pipe clasp.
Drain hose
Drainpipe
Pipe clasp
connecting port
Fig. 25 — Drain Hose Installation
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
NOTE ON DRAINPIPE INSTALLATION
When using an extended drainpipe, tighten the indoor
connection with an additional protection tube. This prevents
it from pulling loose.
The drainpipe should be pitch down at 1/8" per foot to
prevent water from flowing back into the air conditioner.
Incorrect installation could cause water to flow back into the
unit and flood.
When connecting multiple drainpipes, install the pipes as
shown in Figure 26.
≥4"(10cm)
To ensure smooth drainage, the height difference between the wall outlet and
the hanging plate must be greater than 19in(470mm).
Insulation
Pitch 1/8" per foot
Drainage pipe securing requirements
When installing the drainage pipe (field supplied), secure it with a tie or rope.
15
Fig. 26 — Installing Multiple Drainpipes
Recommended opening location
for connecting the pipe outlet
Fig. 27 — Recommended Opening Location
Fig. 28 — Secure the Drainage Pipe
2-1/4"
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