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2. ABOUT THIS PRODUCT
2.1. 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 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 tools for R410A
To install a unit that uses R410A refrigerant, use dedicated tools and piping materi-
als 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
Contents of change for R22 tool
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.
Gauge manifold
It is recommended to use a gauge manifold with a high pressure
display range 500 micron to 768 psi (–0.1 to 5.3 MPa) and a low
pressure display range 500 micron to 551 psi (–0.1 to 3.8 MPa).
To increase pressure resistance, the hose material and base size
Charging hose
were changed.
A conventional (R22) vacuum pump can be used by installing a
vacuum pump adapter.
• A conventional vacuum pump can be used by installing a
Vacuum pump
vacuum pump adapter.
• Be sure that the pump oil does not back flow into the system.
Use one capable for vacuum suction of 500 micron (–100.7
kPa).
Gas leakage
Special gas leakage detector for HFC refrigerant R410A.
detector
2.3. Accessories
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 fire.
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
Operating manual
Installation manual
Template (Carton top)
Washer
WARNING
WARNING
WARNING
Q'ty
Application
1
(This book)
1
For ceiling openings cutting Also
used as packing
1
For installing indoor unit
8
Name and Shape
Coupler heat insulation
(Large)
Coupler heat insulation
(Small)
Cable tie (Me-
dium)
Cable tie (Large)
Filter
Drain hose
Hose band
Drain hose insulation B
2.4. Optional parts
Description
IR receiver unit
UTB-*WC
Remote sensor
UTY-XSZX
UTY-XWZXZC
UTY-XWZXZB
External connect kit
UTY-XWZXZD
UTY-XWZXZ7
UTY-XWZXZE
Auto louver grille
UTD-GXTA-W
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.
Q'ty
Application
For indoor side pipe joint (Large
pipe)
1
For indoor side pipe joint (Small
pipe)
1
For transmission and remote
2
controller cable binding
For fixing the coupler heat
insulation.
4
2
For installing drain pipe.
(Ø 3/4 in [I.D.]; Ø 1-1/16 in [O.D.])
1
For installing drain hose
1
Insulates the drain hose
1
Model
Application
For the wireless remote controller.
Room temperature sensor
For output function
(Output terminal / CNB01)
For control input function
(Apply voltage terminal / CNA01)
For control input function
(Dry contact terminal / CNA02)
For forced thermostat off function
(Apply voltage terminal / CNA03)
For forced thermostat off function
(Dry contact terminal / CNA04)
For Auto louver grille
En-2
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