En-4
2.5. Cassette grille accessories
Name and Shape
Q’ty
Application
Connector cover
1
For covering connector
Tapping Screw
(M5 × 12 mm)
4
For mounting cassette
grille
Tapping Screw
(M4 × 12 mm)
1
For mounting connec-
tor cover
L angle
2
For mounting the Hook
Wire to the Cassette
grille
Hook wire
2
For suspending the
Cassette grille
Screw [pitch small]
(M4 × 10 mm)
2
For mounting the Hook
Wire (for metals)
Screw [pitch large]
(M4 × 10 mm)
4
For mounting the L
angle and Hook wire
(for resins)
2.6. Optional parts
Parts name
Model No.
Application
Wireless Remote
Controller
UTY-LNHUM
For air conditioner
operation
Wired Remote
Controller
UTY-RNNUM
For air conditioner
operation
Simple Remote
Controller
UTY-RSNUM
For air conditioner
operation
Insulation kit for
High humidity
UTZ-KXGC
Install when the
condition under the
roof is over 80% in
humidity and over
30°C in temperature.
External connect kit UTY-XWZX
For control input/out-
put port
Fresh air intake kit
UTZ-VXAA
To take fresh air
3. GENERAL SPECIFICATIONS
This INSTALLATION MANUAL brie
fl
y outlines where and
how to install the air conditioning system. Please read over
the entire set of instructions for the indoor and outdoor units
and make sure all accessory parts listed are with the system
before beginning.
3.1. Type of copper pipe and insulation material
CAUTION
Refer to the Installation Manual for the outdoor unit
for description of allowable pipe length and height
difference.
Copper tubing for connecting the outdoor unit to the indoor
unit and insulation material is available for purchase locally.
When you purchase them, please specify the following.
• Deoxidized annealed copper pipe for refrigerant piping as
shown in the table.
MODEL
Diameter
Liquid pipe
Gas pipe
AU7/9/12
1/4 in. (6.35 mm)
3/8 in. (9.52 mm )
AU18
1/4 in. (6.35 mm)
1/2 in. (12.70 mm)
• Use pipe with water-resistant heat insulation.
CAUTION
Install heat insulation around both the gas and liq-
uid pipes. Failure to do so may cause water leaks.
Use heat insulation with heat resistance above
248 °F (120 °C). (Reverse cycle model only)
In addition, if the humidity level at the installation lo-
cation of the refrigerant piping is expected to exceed
70%, install heat insulation around the refrigerant pip-
ing. If the expected humidity level is 70-80%, use heat
insulation that is 9/16 in. (15 mm) or thicker and if the
expected humidity exceeds 80%, use heat insulation
that is 13/16 in. (20 mm) or thicker.
If heat insulation is used that is not as thick as speci-
fied, condensation may form on the surface of the
insulation. In addition, use heat insulation with heat
conductivity of 0.045 W/(m•K) or less [at 68 °F (20 °C)].
3.2. Additional materials required for installation
A. Refrigeration (armored) tape
B. Insulated staples or clamps for connecting wire
(See your local electrical codes.)
C. Putty
D. Refrigeration lubricant
E. Clamps or saddles to secure refrigerant piping
3.3. Operating range
Cooling/Dry Mode
Heating Mode
Temperature
About 64 to 90 °F
(18 to 32 °C)
About 60 to 88°F
(16 to 31 °C)
Humidity
About 80% or less
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