En-2
WARNING
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
fi
re.
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
fi
re.
If refrigerant leaks while work is being carried out, ventilate the area.
If the refrigerant comes in contact with a
fl
ame, it produces a toxic gas.
Installation must be performed in accordance with the requirement of NEC (National Elec-
trical Code) and CEC (Canadian Electrical Code) by authorized personnel only.
Except for EMERGENCY, never turn off main as well as sub breaker of the indoor units
during operation. It will cause compressor failure as well as water leakage.
First, stop the indoor unit by operating the control unit, converter or external input device
and then cut the breaker. Make sure to operate through the control unit, converter or
external input device.
When the breaker is designed, locate it at a place where the users cannot start and stop in
the daily work.
2. ABOUT THIS PRODUCT
2.1 Precautions for using the R410A refrigerant
WARNING
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 leakage, make sure that it does not exceed the concentration limit.
If a refrigerant leakage 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 leakage occurs during operation, immediately vacate the premises and
thoroughly ventilate the area.
If the refrigerant comes in contact with a
fl
ame, it produces a toxic gas.
2.2 Special tool for R410A
WARNING
To install a unit that uses the R410A refrigerant, use dedicated tools and piping materials
that have been manufactured speci
fi
cally for R410A use.
Because the pressure of the 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
fi
re.
Tool name
Changes
Gauge manifold
Pressure is huge and cannot be measured with a conventional
(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 30 inHg to 768 psi (–0.1 to 5.3 MPa) and a low
pressure display range 30 inHg to 551 psi (–0.1 to 3.8 MPa).
Charging hose
To increase pressure resistance, the hose material and base size
were changed.
Vacuum pump
A conventional (R22) 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 5 Torr, –755 mmHg
(–100.7 kPa).
Gas leakage detector
Special gas leakage detector for R410A refrigerant.
2.3 Accessories
WARNING
For installation purposes, be sure to use the parts supplied by the manufacturer or other
prescribed parts.
The use of non-prescribed parts can cause serious accidents such as the unit to fall, water
leakage, electric shock, or
fi
re.
The following installation parts are furnished. Use them as required.
Keep the Installation Manual in a safe place and do not discard any other accessories until
the installation work has been completed.
Do not discard any accessories needed for installation until the installation work has been
completed.
Name and shape
Q’ty
Application
Operating manual
1
Installation manual
1
(This book)
Cable tie (Medium)
1
For transmission and remote controller cable
binding
Gas pipe heat insulation
1
For gas pipe at the unit inside
Plastic screws
2
For the filter panel fixing
2.4 Optional parts
Description
Model
Application
IR receiver unit
UTB-*WC
For the wireless remote controller.
Remote sensor
UTY-XSZX
Room temperature sensor
External connect kit
UTY-XWZXZC
For output function
(Output terminal / CNB01)
UTY-XWZXZB
For control input function
(Apply voltage terminal / CNA01)
UTY-XWZXZD
For control input function
(Dry contact terminal / CNA02)
UTY-XWZXZ7
For forced thermostat off function
(Apply voltage terminal / CNA03)
UTY-XWZXZE
For forced thermostat off function
(Dry contact terminal / CNA04)
2.5 About unit of the length
This product is different from other Fujitsu General products and it is designed with United
States customary unit. Metric units are provided for reference. When the exact dimensions and
tolerances are required, refer to the United States customary units.
