About This Product; Precautions For Using The R410A Refrigerant; Special Tool For R410A; Accessories - Fujitsu Airstage AUUA4TLAV1 Installation Manual

2. ABOUT THIS PRODUCT

2.1. Precautions for using the R410A refrigerant

Do not introduce any substance other than the prescribed refrigerant into the refrigera-
tion 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 flame, it produces a toxic gas.

2.2. Special tool for R410A

To install a unit that uses the R410A refrigerant, use dedicated tools and piping materi-
als that have been manufactured specifically 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
fire.
Tool name
Pressure is huge and cannot be measured with a conventional (R22)
gauge. To prevent erroneous mixing of other refrigerants, the diam-
eter of each port has been changed.
Gauge manifold
It is recommended to use a gauge manifold with a high pressure dis-
play range 30 in Hg to 768 psi (–0.1 to 5.3 MPa) and a low pressure
display range 30 in Hg 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.
Vacuum pump
Be sure that the pump oil does not backflow into the system. Use
one capable for vacuum suction of 5 Torr, –755 mm Hg (–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
Cable tie (Large)
Cable tie (Medium)
Coupler heat
insulation
(Small)
WARNING
WARNING
Contents of change
WARNING
Q'ty Application
1
(This book)
1
For fixing the connection pipe
(Large and Small)
4
For transmission and remote
controller cable binding.
2
For indoor side pipe joint (Small)
1
Name and Shape
Coupler heat
insulation
(Large)
Special nut A (Large
flange)
Special nut B
(Small flange)
Template
(Carton top)
Drain hose
Hose band
Drain hose
insulation
Cassette grille accessories
Name and Shape
Connector cover
Tapping screw
(M5 × 12mm)
Tapping screw
(M4 × 12mm)

2.4. Optional parts

Description Model
UTY-XWZXZC
UTY-XWZXZB
External connect kit UTY-XWZXZD
UTY-XWZXZ7
UTY-XWZXZE
Insulation kit for high
UTZ-KXGC
humidity

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)
1
For installing indoor unit
4
For installing indoor unit
4
For ceiling openings cutting
Also used as packing
1
For installing drain pipe
(Ø 3/4 in [I.D.]; Ø 1-1/16 in [O.D.])
1
For installing drain hose
1
For installing drain hose
1
Q'ty Application
For covering connector
1
For mounting cassette grille
4
For mounting connector cover
1
Application
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)
Install when the condition under the roof is
over 80% in humidity and over 86 °F (30 °C)
in temperature.
En-2