En-2
2. ABOUT THIS PRODUCT
2.1. Precautions for using 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 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.
2.2. Special tool for R410A
WARNING
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
fi re.
Tool name Changes
Gauge manifold
The pressure in the refrigerant system is extremely high
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 of 30 in Hg to 768 psi (–0.1 to 5.3
MPa) and a low pressure display range of 30 in Hg to
551 psi (–0.1 to 3.8 MPa).
Charging hose
To increase pressure resistance, the hose material and
base size were changed.
(The charging port thread diameter for R410A is 1/2 UNF
20 threads per inch.)
Vacuum pump
A conventional (R22) vacuum pump can be used by
installing a vacuum pump adapter.
Be sure that the pump oil does not backflow 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 falling, 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.
Name and Shape Q’ty Application
Operating manual
1
Installation manual
1
(This book)
Cable tie (Large)
4
For fixing the connection pipe (Large
and Small)
Name and Shape Q’ty Application
Cable tie (Medium)
2
For transmission and remote
controller cable binding
Coupler heat insulation
(Small)
1
For indoor side pipe joint (Small)
Coupler heat insulation
(Large)
1
For indoor side pipe joint (Large)
Special nut A
(Large flange)
4
For suspending the indoor unit from
ceiling
Special nut B
(Small flange)
4
Washer
8
Drain hose
(Large)
1
For installing drain pipe
(For main drain port)
Drain hose
(Small)
1
For installing drain pipe
(For safety drain port)
Hose band
(Large)
1
For installing drain hose (Large)
(For main drain port)
Hose band
(Small)
1
For installing drain hose (Small)
(For safety drain port)
Drain hose insulation
2
For installing drain hose
2.4. Optional parts
The following options are available.
Description Model Application
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)
Remote sensor UTY-XSZX Room temperature sensor
IR receiver unit UTB-*WC For the wireless remote controller.
When installing, please refer to the installation manual of each optional part.
2.5. About unit of the length
All Fujitsu General products are manufactured to metric units and tolerances. United
States customary units are provided for reference only.
In cases where exact dimensions and tolerances are required, always refer to metric units.
9365748237_IM.indb Sec1:29365748237_IM.indb Sec1:2 6/16/2015 4:24:45 PM6/16/2015 4:24:45 PM
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