Instructions / Assembly

Page 23 mrcool.com
Indoor Unit Installation
Wall
Indoor Outdoor
0.2 - 0.3 in
(5 - 7 mm)
Drill used
to create
wall hole
Step 3: Drill a Wall Hole for Connective
Piping
You must drill a hole in the wall for the refrigerant
piping, drainage pipe, and DIYPRO™ cable to pass
through in order to connect the indoor and
outdoor units.
1. Determine the location of the wall hole based
on where the indoor unit is being installed and
relative to where you plan to install the outdoor
unit. The wall hole should be located on an
exterior wall nearest to where the outdoor unit
is to be installed.
2. Using a core drill, with a 3.54 in (90 mm)
diameter, drill a hole in the wall at a slight
downward angle, so that the indoor end of the
hole is higher than the outdoor end of the hole,
by approximately 0.2 in to 0.275 in (5 mm to 7
mm). This will ensure proper water drainage
from the indoor unit (refer to Fig. 5.5).
3. Insert the protective wall sleeve through the
hole of the inside wall, noting the amount it
protrudes from the exterior wall. Then, trim the
excess, with a utility knife or a saw, to make it
flush with the exterior wall (See Fig 5.6). Then,
reinsert the wall hole sleeve for the final time.
4. Install the wall sleeve finishing cap on the
exterior side of the wall hole.
Step 4: Unwind Quick Connect Line Set to
Necessary Length
1. While at the exterior, use your hands to slowly
unwind the copper piping of one end of the
Quick Connect
®
Line Set. The end you unwind
will connect to the indoor unit piping. You should
unwind the end until the connectors are close to
flat on the ground (with little to no bend). If this is
not done, it could make the line set difficult to
maneuver when aligning the connectors with the
cassette connection points. Only unwind as
much as necessary for your application, and
allow any excess to remain coiled (Refer to Fig 5.7).
NOTE ON PIPE BEND RADIUS
When bending the connective refrigerant
piping, it needs to have a bend radius of 4
inches. (Refer to Fig. 5.7)
If the pipe is repeatedly bent or extended, it
will become hard and difficult to manipulate.
Avoid bending or extending the pipe more
than 3 times, or at an angle greater than 90°,
as it could break.
CAUTION
Carefully unroll to indoor
cassette connection
This end will be connected
directly to the outdoor
condenser during the
outdoor unit installation
Keep excess coiled
Radius
≥4 in (10 cm)
Fig. 5.7
When drilling the wall hole be sure to avoid
any wires, screws, plumbing, or any other
sensitive components that could be in or
behind the wall.
CAUTION
Fig. 5.5
Fig. 5.6