About This Product; Precautions For Using R410A Refrigerant; Special Tools For R410A; Accessories - Fujitsu Airstage ASUB18TLAV1 Installation Manual

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 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 tools for R410A

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
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 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.
• 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 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 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
Operating Manual
Installation Manual
Wall hook bracket
Cloth tape
WARNING
WARNING
Contents of change for R22 tool
WARNING
Q'ty Application
1
(This book)
1
For indoor unit installation
1
For indoor unit installation
1
Name and Shape
Tapping screw (Big)
(M4 × 25mm)
Air cleaning fi lter
Air cleaning fi lter frame
Drain hose Insulation
Connecting cable
Cable tie

2.4. Optional parts

Description
UTY-XWZXZC
UTY-XWZXZB
External connect kit UTY-XWZXZD
UTY-XWZXZ7
UTY-XWZXZE

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 wall hook bracket installation
8
For installation, refer to the "CLEAN-
ING AND CARE" in the operating
2
manual.
2
For installing drain hose
1
For wired remote controller cable
connected
1
For transmission and remote con-
troller cable binding
1
Model 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)
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