En-2
During installation, make sure that the refrigerant pipe is attached
fi
rmly before you
run the compressor.
Do not operate the compressor under the condition of refrigerant piping not attached
properly with 2-way or 3-way valve open. This may cause abnormal pressure in the
refrigeration cycle that leads to rupture and even injury.
During the pump-down operation, make sure that the compressor is turned off before
you remove the refrigerant piping. Do not remove the connection pipe while the com-
pressor is in operation with 2-way or 3-way valve open. This may cause abnormal
pressure in the refrigeration cycle that leads to breakage and even injury.
CAUTION!
This mark indicates procedures which, if improperly per-
formed, might possibly result in personal harm to the user,
or damage to property.
This unit must be installed by quali
fi
ed personnel with a capacity certi
fi
cate for han-
dling refrigerant
fl
uids. 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.
This unit contains no user-serviceable parts. Always consult authorized service per-
sonnel to repairs.
When moving, consult authorized service personnel for disconnection and installation
of the unit.
Obtain the distribution network operator's agreement about the power capacity of
•
the power supply system, speci
fi
cation of the cable and the harmonic current, and
etc. when you connect the outdoor unit with the power supply.
This unit must be connected to a power supply with impedance of 0.398 ohm and
•
below. If the power supply does not satisfy this requirement, please consult the
power supplier.
This product is intended for professional use.
•
Be sure to use a dedicated power circuit.
Never use a power supply shared by another appliance.
The units are not explosion proof and therefore should not be installed in explosive
atmosphere.
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 refrig-
erant leakage.
Area containing equipment that generates electromagnetic interference.
•
It will cause the control system to malfunction, preventing the unit from operating
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, grow-
ing 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 cable to a gas pipe, water pipe, lightning
rod, or a telephone ground cable. 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, wet-
ting 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. Oth-
erwise, 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 ear-
lier 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, supervision or
instruction concerning the use of the device.
ABOUT THE UNIT
2.
Precautions for using R410A refrigerant
2. 1.
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.
Special tools for R410A
2. 2.
Tool name
Contents of change for R22 tool
Gauge manifold
Pressure is huge and cannot be measured with a con-
ventional 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.
Vacuum pump
A conventional vacuum pump can be used by installing 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 system. Use one capable for vacuum suction of
-100.7kPa (5 Ton, -755mmHg).
Gas leakage detector
Special gas leakage detector for HFC refrigerant R410A.
Accessories
2. 3.
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)
Drain cap
3
For outdoor unit drain piping work
Drain pipe
1
For outdoor unit drain piping work
Cable tie
2
For binding power cable and
transmission cable
Reducer
1
For connecting gas pipe
(For 54 model)
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