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Page 18
3. Using a 65-mm (2.5”) core 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 12mm (0.5”). This will ensure proper
water drainage (See Fig. 5.5). Place the
protective wall cuff in the hole. This protects
the edges of the hole and will help seal it
when you nish the installation process.
Wall
Indoor
Outdoor
≈ 12mm / 0.5 inch
Fig. 5.5
NOTE: When drilling the wall hole, make sure
to avoid wires, plumbing, and other sensitive
components.
4. Pass the drain hose through the wall hole.
Make sure the water drains to a safe location
where it will not cause water damage or a
slipping hazard.
NOTE: The drainpipe outlet should be at
least 5cm (1.9”) above the ground. If it
touches the ground, the unit may become
blocked and malfunction. If you discharge
the water directly into a sewer, make sure
that the drain has a U or S pipe to catch odors
that might otherwise come back into the
house.
NOTE: When connecting multiple drainpipes,
install the pipes as shown in Fig 5.4.
0-53cm
(20.8”)
≥10cm
(4”)
Fig. 5.4
Page 19
Refrigerant Piping Connection
Safety Precautions
WARNING
All eld piping must be completed by a
licensed technician and must comply with
the local and national regulations.
When the air conditioner is installed in a
small room, measures must be taken to
prevent the refrigerant concentration in
the room from exceeding the safety limit
in the event of refrigerant leakage. If the
refrigerant leaks and its concentration
exceeds its proper limit, hazards due to
lack of oxygen may result.
When installing the refrigeration system,
ensure that air, dust, moisture or foreign
substances do not enter the refrigerant
circuit. Contamination in the system may
cause poor operating capacity, high
pressure in the refrigeration cycle,
explosion or injury.
Ventilate the area immediately if there is
refrigerant leakage during the installation.
Leaked refrigerant gas is both toxic and
flammable. Ensure there is no refrigerant
leakage after completing the installation
work.
Notes On Pipe Length and Elevation
Ensure that the length of the refrigerant pipe, the
number of bends, and the drop height between
the indoor and outdoor units meets the
requirements shown in Table 6.1:
Table 6.1: The Maximum Length And Drop
Height Based on Models. (Unit: m/ft.)
Type of model Capacity
(Btu/h)
Length of
piping
Maximum drop
height
North America,
Australia and the
eu frequency
conversion Split
Type
<15K 25/82 10/32.8
15K - <24K 30/98.4 20/65.6
24K - <36K 50/164 25/82
36K - 60K 65/213 30/98.4
Other Split Type
12K 15/49 8/26
18K-24K 25/82 15/49
30K-36K 30/98.4 20/65.6
42K-60K 50/164 30/98.4
6
Fig. 6.1
Oil traps
CAUTION
If the indoor unit is installed higher than the
outdoor unit:
An oil trap should be installed every 10m
(32.8ft) of vertical suction line riser.
(See Fig. 6.1)
-If oil flows back into the outdoor unit’s
compressor, this might cause liquid
compression or deterioration of oil return. Oil
traps in the rising gas piping can prevent this.
The indoor unit is installed higher than the outdoor unit
18


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