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1-4. SELECTING PIPE SIZE AND OPTIONAL DIFFERENT-DIAMETER JOINTS
The diameter of connection pipes differs according to the type and capacity of indoor units. Match the diameters of connection pipes for indoor and outdoor
units according to the following table.
• If the diameter of connection pipes does not match the diameter of pipe end connections, use optional different-diameter joints.
Outdoor unit
Pipe size
(liquid / gas)
A UNIT
6.35 (1/4) / 9.52 (3/8)
B UNIT
1-5. SELECTING THE INSTALLATION LOCATION
• Where it is not exposed to strong wind.
• Where airflow is good and dustless.
• Where rain or direct sunshine can be avoided as much as possible.
• Where neighbours are not annoyed by operation sound or hot air.
• Where rigid wall or support is available to prevent the increase of op-
eration sound or vibration.
• Where there is no risk of combustible gas leakage.
• When installing the unit at a high level, be sure to secure the unit legs.
• Where it is at least 3 m (9.84 ft) away from the antenna of TV set or
radio. Operation of the air conditioner may interfere with radio or TV re-
ception in areas where reception is weak. An amplifier may be required
for the affected device.
• Install the unit horizontally.
• Please install it in an area not affected by snowfall or blowing snow.
In areas with heavy snow, please install a canopy, a pedestal and/or
some baffle boards.
Note:
It is advisable to make a piping loop near outdoor unit so as to reduce
vibration transmitted from there.
FREE SPACE REQUIRED AROUND OUTDOOR UNIT
1.
Top side obstacles
When there is an obstacle behind the
rear side only, it does not matter if
there is an obstacle over the top side
as shown in the figure below.
3.
Obstacles on front (blowing) side only
In this case, the rear, both sides and
top should be open.
5.
Service space
Keep the service space as shown in the figure below for mainte-
nance.
Service space
100 (3.94)
or more
100 (3.94)
or more
500 (19.68)
or more
All manuals and user guides at all-guides.com
Indoor unit
09 or less/12
6.35 (1/4) / 9.52 (3/8)
6.35 (1/4) / 12.7 (1/2)
- / -
100 (3.94) or more
500 (19.68)
or more
500 (19.68) or more
500 (19.68) or more
350 (13.78) or more
[mm (inch)]
15
- / MAC-454JP
Note:
When operating the air conditioner in low outside temperature, be sure
to follow the instructions described below.
• Never install the outdoor unit in a place where its air inlet/outlet side
may be exposed directly to wind.
• To prevent exposure to wind, install the outdoor unit with its air inlet
side facing the wall.
• To prevent exposure to wind, it is recommended to install a baffle
board on the air outlet side of the outdoor unit.
Avoid the following places for installation where air conditioner trouble
is liable to occur.
• Where flammable gas could leak.
• Where there is much machine oil.
• Salty places such as the seaside.
• Where sulfide gas is generated such as a hot spring.
• Where there is high-frequency or wireless equipment.
2.
Front (blowing) side open
As long as space like the one
shown in the figure can be
maintained, it does not mat-
ter if there are obstacles in
three directions (but top side
is open).
100 (3.94)
or more
4.
Obstacles on front and rear side only
The unit can be used by at-
taching an optional outdoor
blowing guide (MAC-889SG)
(but both sides and top are
open).
• When installing the unit in an area that is enclosed on four sides such
as a verandah, be sure to leave move than 200 mm (7.87 in.) behind
the unit as shown.
• When there is a lack of airflow or there is a possibility of becoming
short cycle, install an outlet guide and make sure there is enough
space behind the rear side of the air inlet.
Note:
Make sure not to install several outdoor units sideways next to each
other.
Window
More than 200
(7.87)
More than
More than
100 (3.94)
200 (7.87)
Less than 1,200 (47.3) of the front surface side
200 (7.87)
or more
350 (13.78)
or more
100 (3.94)
or more
500 (19.68) or more
Blowing guide (MAC-889SG)
More than
350 (13.78)
More than
200 (7.87)
[Unit: mm (inch)]
3
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