About The Unit; Precautions For Using R410A Refrigerant; Special Tools For R410A; Accessories - Fujitsu AJYA36LALH Installation Manual

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.
This mark indicates procedures which, if improperly per-
CAUTION! formed, might possibly result in personal harm to the user,
or damage to property.
This unit must be installed by qualifi ed personnel with a capacity certifi 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, specifi 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 infl 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.
2.

ABOUT THE UNIT

2. 1.

Precautions for using 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
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.
Gauge manifold
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.
To increase pressure resistance, the hose material and
Charging hose
base size were changed.
A conventional vacuum pump can be used by installing a
vacuum pump adapter.
• A conventional vacuum pump can be used by installing
Vacuum pump 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.
2. 3.

Accessories

Use connecting parts as required.
Do not throw away the connecting parts until the installation has been complete.
Name and shape
Specifi cations
manual
Installation
manual
Drain cap
Drain pipe
Cable tie
Reducer
Contents of change for R22 tool
Q'ty Application
—
1
(This book)
1
For outdoor unit drain piping work
3
For outdoor unit drain piping work
1
For binding power cable and
transmission cable
2
For connecting gas pipe
(For 54 model)
1
En-2