Use and Care Manual

Page 31 mrcool.com
Indoor Unit Installation
Step 12: Seal Exterior Wall Hole
Next you will complete steps to finish the exterior
wall hole before installing the outdoor unit. This will
consist of bending the line set downward toward
the exterior wall and sealing the wall hole with
neoprene.
1. In this step, you will carefully bend the portion of
the line set coming out of the exterior wall hole
down towards the wall.
Place your hand on the
underside of the piping coming through the
exterior wall hole (from indoor unit), close to the
wall. With your other hand, using even pressure,
carefully bend the piping downward toward the
wall, being mindful not to damage or dent the
piping in the process.
2. Pack the wall hole with the supplied Neoprene
(or Spray Foam can be used) to seal the hole,
filling any space that was not taken up by the
refrigerant piping and lines.
Be extremely careful not to dent or damage
the piping while bending it down the exterior
wall, as this could negatively affect the
performance.
CAUTION
IMPORTANT!
Once the entire installation has been
completed and the system has been
fully tested, the area above and
around the cassette should be
re-insulated. This will help to guard
against the condensation/sweating of
the unit that can occur due to the
differences in the room temperature
the cassette provides air to and the
environment it is installed in
(example: attic). If the area is not
re-insulated it could cause property
damage and the system to
malfunction!