Use and Care Manual

Page 29 mrcool.com
Indoor Unit Installation
1. First, you will install the drainpipe adapter to the
drain outlet port of the cassette, using one of the
supplied clamps to secure it in place by
tightening the clamp (refer to Fig. 5.16).
2. Slide the other metal clamp onto the other end
of the drainpipe adapter. Then, slide the
drainpipe into the end of the adapter and secure
it by tightening the clamp (refer to Fig. 5.16).
Drain
Outlet
Port
Drainpipe
Drainpipe Adapter
Metal clamps
NOTE DRAINPIPE INSTALLATION
• When using an extended drainpipe, tighten
the indoor connection with an additional
clamp to prevent if from being pulled loose.
• The drainpipe should have a downward
slope of at least 1/100 to prevent water
from flowing back into the unit.
• To prevent the drainpipe from sagging,
place support wires every 39-59 inches (1-1.5
meters). Refer to Fig. 5.17 and 5.18 below.
• If the outlet of the drainpipe is higher than
the drain outlet of the cassette body, create
a vertical section in the drainpipe. This
section of vertical pipe must not be higher
than 29.5 in (75 cm) from the ceiling drywall
and must have a distance of less than 11.8
in (30 cm) away from the unit (refer to Fig.
5.18). Incorrect installation could cause
water to flow back into the unit and flood
which could result in property damage.
• To prevent air bubbles from forming, keep
the drain pipe adapter level or slightly tilted
up at an height of less than 3 in (75 cm).
Refer to Fig 5.18.
• If you’re installing multiple units and plan
to connect them all to one drainpipe, please
refer to Fig. 5.19 & 5.20 on the next page for
more details on how the drainpipe should
be run.
Downward slope
1/100
39-59 in
(1-1.5 m)
Support Wires
39-59 in
(1-1.5 m)
Support Wires
Min. & Max. Upward Tilt
of Drainpipe Adapter
0 to 3 in
(0 to 75 mm)
Max. distance
of vertical pipe
section from unit
≤11.8 in
(30 cm)
Max. height
of vertical pipe
section from ceiling
≤29.5 in
(75 cm)
20.8 in (53 cm)
8.6 in (22 cm)
Fig. 5.17
Fig. 5.18
Fig. 5.16