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CAUTION
I Install an earth leakage breaker depending on the installation place.
If an earth leakage breaker is not installed, it could cause electric shock.
I Perform the drainage/piping work securely according to the installation
manual.
If there is defect in the drainage/piping work, water could drop from the unit,
soaking and damaging household goods.
I Do not touch the air inlet or the aluminum fins of the outdoor unit.
This could cause injury.
I Do not install the outdoor unit where small animals may live.
If small animals enter and touch the electric parts inside the unit, it could cause a
malfunction, smoke emission, or fire. Also, advise user to keep the area around
the unit clean.
1-2. SPECIFICATIONS
Model
Rated
Voltage
MXZ-3F54VF4
en
MXZ-3F68VF4
220-230-
240 V
MXZ-4F72VF4
MXZ-4F80VF4
Maximum amount of
Model
refrigerant charge
MXZ-3F54VF4
MXZ-3F68VF4
MXZ-4F72VF4
MXZ-4F80VF4
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.
MXZ-3F54VF4
MXZ-3F68VF4
—
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.
2
(Could lead to serious injury in particular environments when operated incorrectly.)
Power supply *1
Wire specifications *2
Breaker
Power
Frequency
capacity
supply
3-core
50 Hz
25 A
2.5 mm
2
Factory-charged
refrigerant amount
2.4 kg
2.4 kg
Port size of outdoor unit
MXZ-4F72VF4
Liquid / Gas
MXZ-4F80VF4
A UNIT
6.35 (1/4) / 12.7 (1/2)
B - D UNIT
6.35 (1/4) / 9.52 (3/8)
I Do not operate the air conditioner during interior construction and finish-
ing work, or while waxing the floor.
Before operating the air conditioner, ventilate the room well after such work is
performed. Otherwise, it may cause volatile elements to adhere inside the air
conditioner, resulting in water leakage or scattering of dew.
I When there are the ports which are not used, make sure their nuts are
tightened securely.
I When charging the refrigerant system with additional refrigerant, be sure
to use liquid refrigerant. Charge the liquid refrigerant slowly, otherwise
the compressor will be locked.
To maintain the high pressure of the gas cylinder, warm the gas cylinder with
warm water (under 40°C) during cold season. But never use naked fire or steam.
Pipe length and height difference
*3, *4, *5, *6, *7, *8
Max. pipe length
Indoor/outdoor
Max. height
per indoor unit / for
connecting wire
difference *9
multi-system
25 m / 50 m
4-core
1.0/1.5 mm
2
25 m / 60 m
*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 insuf-
ficient.
*4 Use a copper pipe or a copper-alloy seamless pipe.
*5 Be careful not to crush or bend the pipe during pipe bending.
*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 incor-
rect 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.
(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-E
9.52 (3/8) → 15.88 (5/8) : PAC-SG76RJ-E
12.7 (1/2) → 9.52 (3/8) : MAC-A455JP-E
12.7 (1/2) → 15.88 (5/8) : MAC-A456JP-E
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 a hot spring.
• 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.
• The appliance shall be stored so as to prevent mechanical damage
from occurring.
Outdoor Noise level
Max. no. of bends
per indoor unit / for
Cooling
multi system
25 / 50
46 dB (A) 50 dB (A)
15 m
48 dB (A)
25 / 60
50 dB (A) 55 dB (A)
Optional different-diameter joints
Heating
53 dB (A)
54 dB (A)
(Unit: mm (inch))
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