4.3 Prepare refrigerant piping
Knock-out Panel
Wall
Indoor
Outdoor
m
m
7-
5
(0.2-0.27in)
Fig. 4.3
Fig. 4.4
When drilling the wall hole, make su
r
e to avoid wi
r
es, plumbing, and other sensitive components.
You must drill a hole in the wall for refrigerant piping, the drainage pipe, and the signal cable that will connect
the indoor and outdoor units.
1. Determine the location of the wall hole based on the position of the mounting plate. Refer to above Mounting
Plate Dimensions to help you determine the optimal position.
The wall hole should have a 65mm(2.5in)
diameter at least, and at a slightly lower angle to facilitate drainage.
2. Using a 65mm (2.5in) or 90mm(3.54in) (depending on models )co
re drill, 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 5mm to 7mm (0.2-0.27in). This will ensure proper water drainage. (See Fig. 4.3)
3. Place the pr
otective wall cu
ff in the hole. This protects the edges of the hole and will help seal it when you
finish the installation process.
Caution
4. Indoor Unit Installation
The refrigerant piping is inside an insulating sleeve attached to the back of the unit. You must prepare the piping
before passing it through the hole in the wall. Refer to the Refrigerant Piping Connection section of this manual for
detailed instructions on pipe flaring and flare torque requirements, technique, etc.
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.
2. If the wall hole is behind the unit, keep the knock-out panel in place. If the wall hole is to the side of the indoor
unit, remove the plastic knock-out panel from that side of the unit. (See Fig. 4.4 ). This will create a slot
through which your piping can exit the unit. Use needle nose pliers if the plastic panel is too difficult to
remove by hand.
3. Use scissors to cut down the length of the insulating sleeve to reveal about 15cm (6in) of the refrigerant
piping. This serves two purposes:
1) To facilitate the Refrigerant Piping Connection process
2) To facilitate Gas Leak Checks and enable you to check for dents
4. If existing connective piping is already embedded in the wall, proceed directly to the Connect Drain Hose
step. If there is no embedded 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 Connection section of this manual for
detailed instructions.
5. Based on the position of the wall hole relative to the mounting plate, determine the necessary angle of your
piping.
6. Grip the refrigerant piping at the base of the bend.
7. Slowly, with even pressure, bend the piping towards the hole. Do not dent or damage the piping during the
process.
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