En-2
Do not install the unit in the following areas:
• Area with high salt content, such as at the seaside.
It will deteriorate metal parts, causing the parts to fall or the unit to leak water.
• Area
fi
lled with mineral oil or containing a large amount of splashed oil or
steam, such as a kitchen.
It will deteriorate plastic parts, causing the parts to fall or the unit to leak
water.
• Area that generates substances that adversely affect the equipment, such as
sulfuric gas, chlorine gas, acid, or alkali.
It will cause the copper pipes and brazed joints to corrode, which can cause
refrigerant leakage.
• Area
containing
equipment
that
generates electromagnetic interference.
It will cause the control system to malfunction, preventing the unit from oper-
ating normally.
• Area that can cause combustible gas to leak, contains suspended carbon
fi
bers or
fl
ammable dust, or volatile in
fl
ammables such as paint thinner or
gasoline.
If gas leaks and settles around the unit, it can cause a
fi
re.
• Avoid
installing
the
unit
at places where it will come into contact with animals’
urine or ammonia.
The units are not explosion proof and therefore should not be installed in explosive
atmosphere.
Do not use the unit for special purposes, such as storing food, raising animals,
growing plants, or preserving precision devices or art objects. It can degrade the
quality of the preserved or stored objects.
Ground the unit. Do not connect the ground wire to a gas pipe, water pipe, lightning
rod, or a telephone ground wire. Improper grounding may cause electric shock.
Perform draining for the unit according to the Installation manual. Check that the
water is properly drained.
If the drain processing is improperly installed, water may drip down from the unit,
wetting the furniture.
Do not touch the
fi
ns with bare hands.
Be sure not to start or stop the operation of air conditioning with power breaker.
Otherwise, it may cause malfunction or water leakage.
When setting it up near the equipment that generates electromagnetic waves and
the equipment that generates the higher harmonics wave, be sure to take measures
against noise. Otherwise, it may cause malfunction or failure.
When energizing to the crankcase heater, please turn on the power 12 hours or
earlier before operation begins. When the energizing time is short, it may cause
failure. Besides, please do not turn off power during the busy season.
Children should be monitored to ensure they do not play with the device.
This product is not intended to be used by people (including children) with physical,
sensory or mental disability, or persons lacking experience or knowledge unless
they have been given by the through a person responsible for their safety, supervi-
sion or instruction concerning the use of the device.
2. ABOUT THIS PRODUCT
2. 1. Precautions for using the R410A refrigerant
Pay careful attention to the following points :
Since the working pressure is 1.6 times higher than that of R22 models, some of the
piping and installation and service tools are special. (See the table in the SPECIAL
TOOLS FOR R410A section.)
Especially, when replacing a conventional refrigerant (other than R410A) model with
a new refrigerant R410A model, always replace the conventional piping and
fl
are
nuts with the R410A piping and
fl
are nuts.
Models that use refrigerant R410A have a different charging port thread diameter
to prevent erroneous charging with R22, R407C and for safety. Therefore, check
beforehand. [The charging port thread diameter for R410A is 1/2 UNF 20 threads
per inch.]
Be more careful than the installation of the refrigerant (other than R410A) models,
not to enter foreign matters (oil, water, etc.) and other refrigerant into the piping.
Also, when storing the piping, securely seal the openings by pinching, taping, etc.
When charging the refrigerant, take into account the slight change in the composi-
tion of the gas and liquid phases, and always charge from the liquid phase side
whose composition is stable.
2. 2. Special tools for R410A
Tool name
Contents of change for R22 tool
Gauge manifold
Pressure is huge and cannot be measured with a conven-
tional (R22) gauge. To prevent erroneous mixing of other
refrigerants, the diameter of each port has been changed.
It is recommended to use a gauge manifold with a high
pressure display range -0.1 to 5.3 MPa and a low pressure
display range -0.1 to 3.8 MPa.
Charging hose
To increase pressure resistance, the hose material and
base size were changed.
Tool name
Contents of change for R22 tool
Vacuum pump
A conventional (R22) vacuum pump can be used by install-
ing a vacuum pump adapter.
• A
conventional
vacuum
pump
can be used by installing a
vacuum pump adapter.
• Be sure that the pump oil does not back
fl
ow into the sys-
tem. Use one capable for vacuum suction of -100.7kPa
(5 Ton, -755mmHg).
Gas leakage detec-
tor
Special gas leakage detector for HFC refrigerant R410A.
2. 3. Accessories
Use connecting parts as required.
Do not throw away the connecting parts until the installation has been complete.
Name and shape
Q’ty
Application
Speci
fi
cations
manual
1
—
Installation
manual
1
(This book)
Joint pipe A
1
For connecting gas pipe
(Straight type)
Joint pipe B
1
For connecting gas pipe
(L type)
Cable tie
4
For binding power cable and transmis-
sion cable
2. 4. Combinations
A maximum of 3 outdoor units can be connected to 1 refrigerant system.
The combination of outdoor units per refrigerant system and the number of indoor units
that can be connected are as follows:
Outdoor Unit
Model
Nominal System Capacity (HP)
AJ
072LALBH
8
AJ
090LALBH
10
AJ
108LALBH
12
AJ
126LALBH
14
AJ
144LALBH
16
AJ
162LALBH
18
Installation space combination
Combination (HP)
8
10
12
14
16
18
20 22 24 26 28 30
Outdoor Unit 1 (HP)
8
10
12
14
16
18
10
14
14
16
18
16
Outdoor Unit 2 (HP)
―
―
―
―
―
―
10
8
10
10
10
14
Outdoor Unit 3 (HP)
―
―
―
―
―
―
―
―
―
―
―
―
Maximum Connectable
Indoor Unit
17
21 26 30 34 39 43 47 52 56 60 64
Combination (HP)
32 34 36 38 40 42 44 46 48 50 52 54
Outdoor Unit 1 (HP)
16
18
18
18
16
16
18
18
16
18
18
18
Outdoor Unit 2 (HP)
16
16
18
10
14
16
16
18
16
16
18
18
Outdoor Unit 3 (HP)
―
―
―
10
10
10
10
10
16
16
16
18
Maximum Connectable
Indoor Unit
64 64 64 64 64 64 64 64 64 64 64 64
When connecting outdoor units, install the outdoor unit with the largest nominal system
capacity nearest to the refrigerant pipe and indoor unit, followed by those with lesser
nominal system capacities. (Outdoor unit 1
≥
Outdoor unit 2
≥
Outdoor unit 3)
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