En-5
2.5. Optional parts
Description
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
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
This INSTALLATION MANUAL briefly 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.
]1
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
AR9/12 model
6.35 mm (1/4 in.)
9.52 mm (3/8 in.)
AR18 model
6.35 mm (1/4 in.)
12.70 mm (1/2 in.)
AR24 model
6.35 mm (1/4 in.)
15.88 mm (5/8 in.)
• Use pipe with water-resistant heat insulation.
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
location of the refrigerant piping is expected to
exceed 70%, install heat insulation around the
refrigerant piping. If the expected humidity level is
70-80%, use heat insulation that is 15 mm (19/32 in.)
or thicker and if the expected humidity exceeds 80%,
use heat insulation that is 20 mm (25/32 in.) or thicker.
If heat insulation is used that is not as thick as
specified, 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).
]1
3.2. Additional materials required for installation
A. Refrigeration (armored) tape
B. I n s u l a t e d s t a p l e s o r c l a m p s f o r c o n n e c t i n g w i r e
(See your local electrical codes.)
C. Putty
D. Refrigeration lubricant
E. Clamps or saddles to secure refrigerant piping
]1
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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