Use and Care Manual
Page 25 mrcool.com
Indoor Unit Installation
4. Secure the metal clad of the DIYPRO™ Cable to the
circuit breaker box with two ST3.9*10 screws.
Then, secure the wire body within the circuit
breaker box with a tie. Please see Fig. 5.11 below.
NOTE: Three ST3.9*10 screws are provided,
but only two are needed to complete this
step. The remaining screw is to be kept as a
spare.
5. Reinstall the circuit breaker cover with the two
screws you previously removed (See Fig. 5.12).
6. Once the DIYPRO™ Cable is installed to the
cassette, feed the cable up through the hole and
into the ceiling and out of the wall hole to the
exterior of the house.
Two screws
Secure wire
body with a tie
Secure
metal clad
of cable
with two
screws
Step 6: Install Cassette into Ceiling
In this step you will position the cassette into place
in the ceiling hole and mount it to the ceiling joists
using the supplied screws.
1. Determine the orientation the cassette needs to
be installed into the ceiling before attempting to
position it in place. The orientation will be based
on where the refrigerant line set will connect to
the unit. The side of the cassette which has the
connection ports for the refrigerant piping
should align with the side of ceiling hole where
the line set has been routed to ensure a smooth
connection.
2. Now, with the assistance of at least one other
person, carefully lift and position the cassette
into the ceiling hole and ensure that the cassette
fits completely into the hole unhindered from
any unforeseen obstructions. Continue to
position the cassette until it is completely aligned
with the hole and the mounting flanges on each
side of the unit sit flat against the ceiling joists.
3. Then, mount the unit to the ceiling joists by
installing six ST8.0*50 screws (3 per side)
through the holes of the unit mounting flanges
and into the ceiling joists. Ensure the screws are
fully threaded into the joist and will not loosen
over time (see Fig 5.13). NOTE: Eight ST8.0*50
screws provided, but only six are needed to
complete this step. The remaining two
screws are to be kept as spares.
Ceiling
Joists
Secure with six screws
Cassette
Mounting
Flanges
Fig. 5.11
Fig. 5.12
Fig. 5.13