En-5
2.5. Optional parts
Description
Model No.
Application
Wireless Remote
Controller
UTY-LNHUM
For air conditioner
operation
Wired Remote Con-
troller
UTY-RNNUM
For air conditioner
operation
Simple Remote Con-
troller
UTY-RSNUM
For air conditioner
operation
IR Receiver Unit
UTY-LRHUM
For the wireless
remote controller
Remote Sensor Unit
UTY-XSZX
Room temperature
sensor
External Control Set
UTD-ECS5A
For control input/
output port
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 be-
fore beginning.
3.1. Type of copper pipe and insulation material
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:
CAUTION
Refer to the Installation Manual for the outdoor unit
for description of allowable pipe length and height
difference.
MODEL
Diameter
Liquid Pipe
Gas Pipe
AR7/9/12
1/4 in. (6.35 mm)
3/8 in. (9.52 mm)
AR18
1/4 in. (6.35 mm)
1/2 in. (12.70 mm)
AR24
1/4 in. (6.35 mm)
5/8 in. (15.88 mm)
• Use pipe with water-resistant heat insulation.
• All Fujitsu General products are manufactured to metric
units and tolerances. United States customary units are pro-
vided for reference only. In cases where exact dimensions
and tolerances are required, always refer to metric units.
CAUTION
Install heat insulation around both the gas and liquid
pipes. Failure to do so may cause water leaks.
Use heat insulation with heat resistance above 248 °F.
(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).
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
About 60 to 88 °F
Humidity
About 80% or less
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