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INSTALLATION MANUAL
PART NO. 9380441038
INDOOR UNIT (Duct Type)
Contents
1.
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2.
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2.1.
2.2.
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2.3.
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2.4.
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3.
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3.1.
3.2.
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3.3.
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4.
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4.1.
4.2.
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4.3.
4.4.
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5.
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6.
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6.1.
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6.2.
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7.
7.1.
7.2.
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8.
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8.1.
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8.2.
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8.3.
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8.4.
9.
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10.
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11.
11.1.
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11.2.
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11.3.
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12.
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12.1.
12.2.
13.
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14.
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11
SAFETY PRECAUTIONS
•
Be sure to read this Manual thoroughly before installation.
•
The warnings and precautions indicated in this Manual
contain important information pertaining to your safety. Be sure to observe them.
•
Hand this Manual, together with the Operating Manual, to the customer. Request the
customer to keep them on hand for future use, such as for relocating or repairing the unit.
This mark indicates procedures which, if improperly performed,
WARNING
might lead to the death or serious injury of the user.
Request your dealer or a professional installer to install the indoor unit in accordance
with this Installation Manual. An improperly installed unit can cause serious accidents
such as water leakage, electric shock, or fire. If the indoor unit is installed in disregard
of the instructions in the Installation Manual, it will void the manufacturer's warranty.
Do not turn ON the power until all work has been completed. Turning ON the power
before the work is completed can cause serious accidents such as electric shock or
fire.
If refrigerant leaks while work is being carried out, ventilate the area. If the refrigerant
comes in contact with a flame, it produces a toxic gas.
Installation work must be performed in accordance with national wiring standards by
authorized personnel only.
Do not touch the fins of the heat exchanger. Touching the heat exchanger fins could
result in damage to the fins or personal injury such as skin rupture.
This mark indicates procedures which, if improperly performed,
CAUTION
might possibly result in personal harm to the user, or damage
to property.
Read carefully all security information before use or install the air conditioner.
Do not attempt to install the air conditioner or a part of the air conditioner by yourself.
This unit must be installed by qualified personnel with a capacity certificate for handling
refrigerant fluids. Refer to regulation and laws in use on installation place.
The installation must be carried out in compliance with regulations in force in the place
of installation and the installation instructions of the manufacturer.
This unit is part of a set constituting an air conditioner. It must not be installed alone or
with non-authorized by the manufacturer.
Always use a separate power supply line protected by a circuit breaker opera-ting on all
wires with a distance between contact of 3 mm for this unit.
The unit must be correctly grounded and the supply line must be equipped with a dif-
ferential breaker in order to protect the persons.
En-1
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The units are not explosion proof and therefore should not be installed in explosive
atmosphere.
Never touch electrical components immediately after the power supply has been turned
off. Electric shock may occur. After turning off the power, always wait 5 minutes before
touching electrical components.
This unit contains no user-serviceable parts. Always consult authorized service person-
nel to repairs.
When moving, consult authorized service personnel for disconnection and installation
of the unit.
This appliance is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge, unless
they have been given supervision or instruction concerning use of the appliance by a
person responsible for their safety. Children should be supervised to ensure that they do
not play with the appliance.
21
ABOUT THE UNIT
21 11
Precautions for using R410A refrigerant
Do not introduce any substance other than the prescribed refrigerant into the
refrigeration cycle. If air enters the refrigeration cycle, the pressure in the refrigeration
cycle will become abnormally high and cause the piping to rupture.
If there is a refrigerant leak, make sure that it does not exceed the concentration limit.
If a refrigerant leak exceeds the concentration limit, it can lead to accidents such as
oxygen starvation.
Do not touch refrigerant that has leaked from the refrigerant pipe connections or other
area. Touching the refrigerant directly can cause frostbite.
If a refrigerant leak occurs during operation, immediately vacate the premises and
thoroughly ventilate the area. If the refrigerant comes in contact with a flame, it
produces a toxic gas.
21 21
Special tool for R410A
To install a unit that uses R410A refrigerant, use dedicated tools and piping materials
that have been manufactured specifically for R410A use. Because the pressure
of R410A refrigerant is approximately 1.6 times higher than the R22, failure to use
dedicated piping material or improper installation can cause rupture or injury.
Furthermore, it can cause serious accidents such as water leakage, electric shock, or fire.
Tool name
The pressure in the refrigerant system is extremely high
and cannot be measured with a conventional gauge.
To prevent erroneous mixing of other refrigerants,
Gauge manifold
the diameter of each port has been changed. It is
recommended to use a gauge manifold with a high
pressure display range of -0.1 to 5.3 MPa and a low
pressure display range of -0.1 to 3.8 MPa.
To increase pressure resistance, the hose material and
base size were changed.
Charging hose
(The charging port thread diameter for R410A is 1/2 UNF
20 threads per inch.)
A conventional vacuum pump can be used by installing a
vacuum pump adapter.
Vacuum pump
Be sure that the pump oil does not backflow into the
system. Use one capable for vacuum suction of
-100.7 kPa (5 Torr, -755 mmHg).
Gas leakage detector
Special gas leakage detector for R410A refrigerant.
WARNING
WARNING
Changes
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