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*1 Connect to the power switch which has a gap of 3 mm or more when open
to interrupt the source power phase. (When the power switch is shut off, it
must interrupt all phases.)
*2 Use wires in conformity with design 60245 IEC 57. Use the indoor/outdoor
connecting wire in conformity with the wire specifications specified in the
installation manual of the indoor unit.
*3 Never use pipes with thickness less than specified. The pressure resistance
will be insufficient.
*4 Use a copper pipe or a copper-alloy seamless pipe.
*5 Be careful not to crush or bend the pipe during pipe bending.
1-3. SELECTING OPTIONAL DIFFERENT-DIAMETER JOINTS
If the diameter of connection pipe does not match the port size of outdoor unit, use optional different-diameter joints according to the following table.
Port size of outdoor unit
MXZ-2E52VAD MXZ-3E54VAD MXZ-4E71VAD
—
—
A - B UNIT
A - C UNIT
1-4. 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 opera-
tion sound or vibration.
• Where there is no risk of combustible gas leakage.
• When installing the unit, be sure to secure the unit legs.
• Where it is at least 3 m away from the antenna of TV set or radio. Opera-
tion of the air conditioner may interfere with radio or TV reception 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.
Obstacles above
When there is no obstacle in front and
on the sides of the unit, it is allowed
to install the unit where an obstacle is
above the unit only if the space shown
in the figure is provided.
3.
Obstacles in front (blowing) only
When there is an obstacle in front of
the unit as shown in the figure, open
space above, behind, and on the sides
of the unit is required.
Liquid / Gas
A UNIT
6.35 (1/4) / 12.7 (1/2)
B - D UNIT
6.35 (1/4) / 9.52 (3/8)
100 or more
500 or more
500 or more
*6 Refrigerant pipe bending radius must be 100 mm or more.
*7 Insulation material : Heat resisting foam plastic 0.045 specific gravity
*8 Be sure to use the insulation of specified thickness. Excessive thickness
may cause incorrect installation of the indoor unit and insufficient thickness
may cause dew drippage.
*9 If the outdoor unit is installed higher than the indoor unit, max. height
difference is reduced to 10 m.
*10 If pipe length exceeds 40 m, additional refrigerant (R410A) charge is re-
quired. (No additional charge is required for pipe length less than 40 m.)
Additional refrigerant = A × (pipe length (m) - 40)
Optional different-diameter joints
(port size of outdoor unit → diameter of connection pipe)
6.35 (1/4) → 9.52 (3/8) : PAC-493PI
9.52 (3/8) → 12.7 (1/2) : MAC-A454JP
9.52 (3/8) → 15.88 (5/8) : PAC-SG76RJ
12.7 (1/2) → 9.52 (3/8) : MAC-A455JP
12.7 (1/2) → 15.88 (5/8) : MAC-A456JP
Refer to the installation manual of indoor unit for the diameter of connection
pipe of indoor unit.
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.
• Where oil is splashed or where the area is filled with oily smoke
(such as cooking areas and factories, in which the properties of
plastic could be changed and damaged).
• Salty places such as the seaside.
• Where sulfide gas is generated such as hot spring, sewage, waste
water.
• Where there is high-frequency or wireless equipment.
• Where there is emission of high levels of VOCs, including phthalate
compounds, formaldehyde, etc., which may cause chemical cracking.
2.
Front (blowing) side open
As long as space indicated
in the figure is provided, it
is allowed to install the unit
where obstacles are behind
and on the sides of the unit.
(No obstacle above the unit)
100 or more
4.
Obstacles in front and behind
The unit can be used by at-
taching an optional outdoor
blowing guide (MAC-
856SG) (but both sides and
top are open).
(Unit: mm (inch))
200 or more
350 or more
100 or more
500 or more
Blowing guide (MAC-856SG)
(Unit: mm)
En-2
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