Concealed Ducted Air Handler Installation Manual

NOTE: When connecting multiple drainpipes,
install the pipes as illustrated.
NOTE: The drainpipe outlet should be at
least 1.9” above the ground. If it touches the
ground, the unit may become blocked and
malfunction. If you discharge the water direct-
ly into a sewer, make sure that the drain has
a U or S pipe to catch odors that might other-
wise come back into the house.
Units with a pump
21.7”
Indoor Unit
Installation
 Page 21 
Revised 5/14/2020
Indoor Drainpipe Installation
Install the drainpipe as illustrated in the following
Figure.
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 rmly with a pipe clasp.
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.
Step 7: Connect drain hose
The drainpipe is used to drain water away from
the unit. Improper installation may cause unit
and property damage.
• 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 will
discharge 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.
Installation requires PVC piping for drainage.
Use of exible plastic drain tubing is
discouraged.
• 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 owing back into the air
conditioner.
• To prevent the pipe from sagging, space
hanging wires every 39-59”.
• 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” from the ceiling board. The distance
between the unit and the lift pipe must
be less than 7.9”. Incorrect installation
could cause water to ow back into the
unit and ood.
• To prevent air bubbles, keep the drain
hose level or slightly tiled up (<3”).
CAUTION
NOTE ON PROPER DRAIN PIPING
NOTE ON PROPER DRAIN PIPING
Drainpipe
connecting port
Drain hose
Pipe clasp
Insulation
Drainpipe installation for units with a pump
39-59”
Lean over 1/50
<7.9”
<21.7”
Ceiling