45MBDAQ: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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Notes 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 slope downward at a gradient of at least 1/100 to
prevent water from flowing back into the air conditioner.
• To prevent the pipe from sagging, space hanging wires every 39-59 in
(1-1.5 m).
• If the outlet of the drainpipe is higher than the body’s pump joint, use
a lift pipe for the indoor unit’s exhaust outlet. The lift pipe must be
installed no higher than 21.7 in (55 cm) from the ceiling board. The
distance between the unit and the lift pipe must be less than 7.9 in
(20 cm). Incorrect installation could cause water to flow back into the
unit and flood.
• To prevent air bubbles, keep the drain hose level or slightly tiled up
(< 3 in/75 mm).
Fig. 52 —Drainpipe for Units with a Pump
NOTE: When connecting multiple drainpipes, install the pipes as
illustrated.
Fig. 53 —Units with a Pump
4. Pass the drain hose through the wall hole. Ensure the water drains to a
safe location where it will not cause water damage or a slipping hazard.
NOTE: The drainpipe outlet should be at least 1.9 in (5 cm) above the
ground. If it touches the ground, the unit may become
blocked and malfunction. If you discharge the water directly
into a sewer, make sure that the drain has a U or S pipe to
catch odors that might otherwise come back into the house.
Drainage Test
Check whether the drainpipe is unhindered. This test should be performed
on newly built houses before the ceiling is installed.
Units with a Pump
Fig. 54 —Drainage Test
1. Remove the test cover.
2. Fill the water pan with 2 liters of water.
3. Turn on the unit in COOLING mode. You will hear the drain pump.
Check whether the water is discharged properly (a 1-minute lag is
possible, depending on the length of the drain pipe). Check whether
water leaks from the joints.
4. Turn off the air conditioner and put the cap back on.
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