Pipe Requirement; Electrical Requirement; Optional Parts; Selecting The Pipe Material - Fujitsu ARU30RGLX Installation Manual

Name and Shape
Operating Manual
Installation Manual
(indoor unit)
Special nut A
(large fl ange)
Special nut B
(small fl ange)
Washer
Coupler heat insulation (large)
Coupler heat insulation (small)
Cable tie (large)
Cable tie (medium)
Cable tie (small)
Drain hose insulation
Drain hose
Hose Band

2. 4. Pipe requirement

Refer to the installation manual of the outdoor unit for description of the length of con-
necting pipe or for difference of its elevation.
Model
Gas pipe
12 3/8 (9.52)
18 1/2 (12.70)
24/30/36/42/48 5/8 (15.88)
• Use pipe with water-resistant heat insulation.
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 (120 °C). (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 to 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 specified, condensa-
tion 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)).
Q'ty Description
1
1 (This book)
4
For suspending the indoor unit
4
from ceiling
8
For indoor side pipe joint
1
(gas pipe)
For indoor side pipe joint
1
(liquid pipe)
4 For fi xing the heat insulation
For fi xing the remote controller
1
cable
For fi xing the remote controller
1
cable
Insulates the drain hose and
1
vinyl hose
For installing drain pipe
1
(Ø 1 in [I.D.], Ø 1-1/4 in [O.D.])
1 For installing drain hose
CAUTION
Diameter [in (mm)]
Liquid pipe
1/4 (6.35)
1/4 (6.35)
3/8 (9.52)
CAUTION

2. 5. Electrical requirement

The indoor unit is powered from the outdoor unit. Do not power indoor unit from separate
power source.
Standard for electrical wiring and equipment differs in each country or region. Before
you start electrical working, confi rm related regulations, codes, or standards.
Cable
Connection cable
Cable Length: Limit voltage drop to less than 2%. Increase cable gauge if voltage drop is
2% or more.
Cable
Remote controller cable (2-wire type)

2. 6. Optional parts

Refer to each installation manual for the method of installing optional parts.
Parts name Model No.
Wired remote controller UTY-RNRUZ2
UTY-RSRY
Simple remote controller
UTY-RHRY
W-LAN interface UTY-TFSXZ2
IR receiver unit UTY-LBTUM
Thermostat convertor UTY-TTRX
External input and output
UTY-XCSX
PCB
External input and output
UTZ-GXNA
PCB bracket
External connect kit UTY-XWZXZG
Air fi lter kit UTD-LFNA/B/C

2. 7. Selecting the pipe material

• Do not use existing pipes from another refrigeration system or refrigerant.
• Use pipes that have clean external and internal sides without any contamination which
may cause trouble during use, such as sulfur, oxide, dust, cutting waste, oil, or water.
• It is necessary to use seamless copper pipes.
Material : Phosphor deoxidized seamless copper pipes
It is desirable that the amount of residual oil is less than 0.04 oz/100 ft (40 mg/10 m).
• Do not use copper pipes that have a collapsed, deformed, or discolored portion (es-
pecially on the interior surface). Otherwise, the expansion valve or capillary tube may
become blocked with contaminants.
• Improper pipe selection will degrade performance. As an air conditioner using R410A
incurs pressure higher than when using conventional (R22) refrigerant, it is necessary to
choose adequate materials.
• Thicknesses of copper pipes used with R410A are as shown in the table.
• Never use copper pipes thinner than those indicated in the table even if they are available
on the market.
Thicknesses of Annealed Copper Pipes (R410A)
Pipe outside diameter [in (mm)]
1/4 (6.35)
3/8 (9.52)
1/2 (12.70)
5/8 (15.88)
3/4 (19.05)
WARNING
Conductor size
Remarks
(AWG)
3Wire+Earth (Ground),
AWG 18 to 16
1Ø 208/230V
Conductor size
Remarks
(AWG)
Non-polar 2-wired,
AWG 22 to 16
twisted pair
Application
For air conditioner operation
(2-wired type)
For air conditioner operation
(2-wired type)
For wireless LAN control
For air conditioner operation
For air conditioner operation
For connecting external
devices
For installing the External input
and output PCB
For control output port
LFNA : 36/42/48 model
LFNB : 18/24/30 model
LFNC : 12 model
CAUTION
Thickness [in (mm)]
0.032 (0.80)
0.032 (0.80)
0.032 (0.80)
0.039 (1.00)
0.039 (1.20)
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