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Step 5 - Condensate Drains
The drainpipe is used to drain water away from the unit. Improper
installation may cause unit and property damage.
CAUTION
• Insulate all piping to prevent condensation, which could lead to
water damage. Check the local codes.
• If the drainpipe is bent or installed incorrectly, water may leak
and cause a water-level switch malfunction.
• In HEAT mode, the outdoor unit may discharge water. Ensure
that the outdoor drain will not contribute to damage and
slippage.
• DO NOT pull the drainpipe forcefully. This could disconnect it.
NOTE: Installation requires adapting the locally sourced drain line to
a 3/4" NPT female pipe thread connection.
INDOOR DRAINPIPE INSTALLATION
1. Cover the drainpipe with insulation, as required, to prevent
condensation and leakage. These units operate with a positive
pressure at the drain connection and a drain trap is required. The
trap needs to be installed as close to the unit as possible. Ensure the
top of the trap is below the connection to the drain pan to allow
complete drainage of the pan.
VERTICAL DISCHARGE
PRIMARY DRAIN
Fig. 37 — Vertical Discharge
NOTE:
Horizontal runs must also have a drain trap installed ahead
of the horizontal run to eliminate air trapping.
12
NOTES: When using an extended drainpipe, tighten the indoor
connection with an additional protection tube to prevent it from
pulling loose.
Figure 37 shows how to trap or plug all drains to provide a a vertical
discharge. Figure 38 shows how to trap or plug all drains to provide a
right-hand discharge.
Hand tighten the plug(s) for drain holes that are unused.
Incorrect installation could cause water to flow back into the unit and
flood.
2. Use a 2.5in (65mm) core drill to drill a hole in the wall. Make sure
the hole is drilled at a slight downward angle, so that the outdoor
end of the hole is lower than the indoor end by about 0.5in (12mm).
This will ensure proper water drainage. Place the protective wall
cuff in the hole. This protects the edges of the hole and helps seal
the hole once the installation is complete.
NOTE:
and other sensitive components.
3. Pass the drain hose through the wall hole. Make sure 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 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. Follow the local
plumbing codes.
Specifications subject to change without notice.
Install a drain trap per the local codes
PRIMARY DRAIN
Fig. 38 — Primary Drain
Wall
Outdoor
≈ 0.5 in.(12mm)
Fig. 39 — Drill hole
When drilling the hole, make sure to avoid wires, plumbing,
≥
Indoor
IM-40MBAA-02
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