Step 4 - Condensate Drain Installation - Carrier Performance 40MBDQ Series Installation Instructions Manual

Step 4 - 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, be sure to 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. 28).
• 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
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 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.
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.
26).
Drain hose
Drainpipe
Pipe clasp
connecting port
Fig. 26 — Indoor Drainpipe Installation
IM-40MBDQ-05
28.
Insulation
Specifications subject to change without notice.
Ceiling
Fig. 27 — Condensate piping without a pump
Ceiling
Fig. 28 — Condensate piping with a pump
When connecting multiple drainpipes, install the pipes as
shown in Fig. 29.
Units with a pump
21in
(0-53cm)
Units without a pump
≥4in
10cm
Fig. 29 — 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.
3.28-4.92'
/1-1.5m
Lean over 1/50
<7.9in
39-59in Lean over
1-1.5m
20cm
1/50
A
3in
(0 - 75mm)
11