45MBDAQ: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
25
C. CONDENSATE DRAIN INSTALLATION
The condensate pipe is used to drain water away from the unit. Improper
installation may cause unit and property damage. The unit is supplied
with a drain adapter allowing the use of a field supplied 3/4 in. PVC
Schedule 40 drain pipe. When installing the condensate piping, keep in
mind the following details and follow these recommendations:
NOTE: When installing drains, adhere to the local sanitation
codes.
• The ducted slim indoor unit is supplied with a condensate lift pump
that is capable of lifting water 29.5in. (750mm).
• Ensure the highest point in the condensate piping is as close to the unit
as possible (see Fig. 39).
• Ensure the condensate piping slopes downward in the direction of the
condensate flow, with a minimum gradient of 1/100.
• When multiple units are connected to a common condensate drain,
ensure the drain is large enough to accommodate the volume of
condensate from all the units. Consider the recommendation to install
an air vent in the condensate piping to prevent air lock.
• Do not install condensate piping where exposure to freezing
temperatures is possible.
• To prevent the pipe from sagging, hangers should be spaced every 36
in (91.44cm). Be sure to follow local codes.
• If the drainpipe outlet is higher than the body’s pump joint, provide a
lift pipe for the indoor unit’s exhaust outlet.
• Do not install the lift pipe higher than 21in. (55cm) from the center
line of the pump outlet pipe. The distance between the unit and the lift
pipe must be less than 8in (20cm). An incorrect installation could
allow water to flow back into the unit and flood.
• To prevent air bubbles, keep the drain hose horizontal or slightly
upward. See letter (A) Figure 39
.
1. Cover the drain hose 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 (see Fig. 37).
Fig. 37 —Indoor Drainpipe Installation
Fig. 38 —Condensate piping without a pump
Fig. 39 —Condensate piping with a pump
When connecting multiple drainpipes, install the pipes as shown in Fig. 40.
Fig. 40 —Connecting Multiple Drain Pipes
3. 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 2in (5cm) above the
ground. If the outlet touches the ground, the unit may become
blocked and malfunction. If you discharge the water directly
into a sewer, make sure the drain has a U or S pipe to catch
odors that might otherwise come back into the house.
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
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. This could disconnect it.
CAUTION
Drainpipe
connecting port
Drain hose
Pipe clasp
Insulation
3.28-4.92’
Lean over 1/50
Ceiling
/1-1.5m
<7.9in
20cm
Lean over
1/50
Ceiling
3in
(0 - 75mm)
39-59in
<21.7in
55cm
A
1-1.5m
21in
(0-53cm)
≥4in
10cm
Units with a pump
Units without a pump
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