Wall Mount Unit Installation Manual

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STEP 4: PREPARE REFRIGERANT PIPING
1. Based on the position of the wall hole relative to the mounting plate, choose the side from
which the piping will exit the unit (left or right).
2. If the wall hole is behind the unit, do not remove the knock-out panel. If the wall hole is to the
side of the indoor unit, remove the plastic knock-out panel from that side of the unit. This will
create a slot through which your piping can exit the unit. Use needle nose pliers or cutters if
the plastic panel is too difficult to remove by hand. Grooves have been made in the knock-out
panel in order to cut it to size conveniently. The size of the piece removed is determined by the
diameter of the piping.
2. Using a 2 1/2" (65mm) core drill for units with a gas side connective pipe less than 5/8" (16mm),
or 3 1/2" (90mm) for units with a gas side pipe greater than or equal to 5/8" (16mm), drill a hole
in the wall. Make sure that the hole is drilled at a slight downward angle, so that the outdoor
end of the hole is lower than the indoor end by about 3/16 - 1/4" (5mm to 7mm). This will ensure
proper water drainage.
Wall
Indoor Outdoor
3/16-1/4”
(5-7 mm)
Knock-out Panel
3. Place the protective wall hole sleeve into the hole. This protects pipes and cables from sharp
edges and will help seal the opening when you finish the installation process. After the sleeve
is inserted through the wall, connect the wall hole cover to the wall sleeve on the outside end.
Make sure the cover is flush with the outside wall.
3. If pre-existing connective piping is already embedded in the wall, proceed directly to Step 5:
Connect the Drain Pipe. If there is no pre-existing piping, connect the indoor unit’s refrigerant
piping to the connective piping that will join the indoor and outdoor units. Refer to the
Refrigerant Piping Connections section of your outdoor unit's installation manual for detailed
instructions.