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2. PRODUCT SPECIFICATION
2.1. Installation tools
Tool name Contents of change
Gauge manifold
Pressure is high and cannot be measured with a R22
gauge. To prevent erroneous mixing of other refrigerants,
the diameter of each port has been changed.
It is recommended to use gauge with seals -0.1 to 5.3 MPa
(-1 to 53 bar) for high pressure.
-0.1 to 3.8 MPa (-1 to 38 bar) for low pressure.
Charge hose
To increase pressure resistance, the hose material and
base size were changed. (R32/R410A)
Vacuum pump
A conventional vacuum pump can be used by installing a
vacuum pump adapter.
Gas leakage detector
Special gas leakage detector for HFC refrigerant R410A or
R32.
■
Copper pipes
It is necessary to use seamless copper pipes and it is desirable that the amount of residual
oil is less than 40 mg/10 m. Do not use copper pipes having a collapsed, deformed or
discolored portion (especially on the interior surface). Otherwise, the expansion value or
capillary tube may become blocked with contaminants.
As an air conditioner using R32 (R410A) incurs pressure higher than when using R22, it is
necessary to choose adequate materials.
WARNING
• Do not use the existing (for R22) piping and flare nuts.
If the existing materials are used, the pressure inside the refrigerant cycle will rise and
cause failure, injury, etc. (Use the special R32/R410A materials.)
• Use (refill or replace with) specified refrigerant (R32) only. Use of unspecified refriger-
ant can cause product malfunction, burst, or injury.
• Do not mix any gas or impurities except specified refrigerant (R32). Inflow of air or ap-
plication of unspecified material makes the internal pressure of the refrigerant cycle too
high, and may cause product malfunction, burst of piping, or injury.
• 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 fire.
• Do not turn on the power until all work has been completed.
CAUTION
This manual describes how to install the indoor unit only. To install the outdoor unit or
branch box, (if any), refer to the installation manual included in each product.
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2.2. Accessories
The following installation accessories are supplied. Use them as required.
Name and Shape
Q’ty
Name and Shape
Q’ty
Operation manual
1
Tapping screws (large)
9
Operation manual
(CD-ROM)
1
Tapping screws (small)
2
Installation manual
(This manual)
1
Battery
2
Remote controller
1
Wall hook bracket
1
Remote controller
holder
1
Ion deodorization filter
(light blue)
1
Cloth tape
1
Apple-catechin filter
(white)
1
The following items are necessary to install this air conditioner. (The items are not included
with the air conditioner and must be purchased separately.)
Additional materials
Connection pipe assembly Wall cap
Connection cable (4-conductor) Saddle
Wall pipe Drain hose
Decorative tape Tapping screws
Vinyl tape Putty
Sealant Refrigeration (armored) tape
Insulated staples or clamps for connecting
wire (refer to your electrical cables.)
Clamps or saddles to secure refrigerant pip-
ing
Refrigeration lubricant
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2.3. Pipe requirement
CAUTION
Refer to the installation manual for the outdoor unit for description of allowable pipe
length and height difference.
Gas pipe size (thickness) [mm] Liquid pipe size (thickness) [mm]
Ø
9.52 (0.80)
Ø
6.35 (0.80)
• Use pipe with water-resistant heat insulation.
CAUTION
• Wrap heat insulation around both gas pipe and liquid pipe.
No heat-insulation work or incorrect heat-insulation work may cause water leaks.
• In a reverse cycle model, use heat insulation with heat resistance above 120 °C.
• If expected humidity of the installation location of refrigerant pipes is higher than
70 %, wrap the heat insulation around the refrigerant pipes.
If the expected humidity is between 70 % and 80 %, use heat insulation that has
a thickness of 15 mm or more.
If the expected humidity is higher than 80 %, use heat insulation that has a thickness
of 20 mm or more.
• The use of thinner heat insulation than specified above, may cause a condensation
on the surface of the insulation.
• Use heat insulation with thermal conductivity of 0.045 W/(
m•K
) or less, at 20
°C
.
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2.4. Electrical requirement
The indoor unit is powered from the outdoor unit. Do not power indoor unit from separate
power source.
WARNING
Standard for electrical wiring and equipment differs in each country or region. Before you
start electrical working, confirm related regulations, codes, or standards.
Cable
Conductor size [
mm
2
] Type
Remarks
Connection cable
1.5 Type 60245 IEC 57
3 cable + Ground
(Earth), 1 Ø 230 V
Cable Length: Limit voltage drop to less than 2%. Increase cable gauge if voltage drop is
2% or more.
Cable
Conductor size [
mm
2
] Type
Remarks
Remote control-
ler cable
(2-wire type)
0.33 to 1.25
Non-polar 2 core,
twisted pair
Use sheathed cable
(locally purchased) in
accordance with the
regional cable standard.
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2.5. Optional parts
Refer to each installation manual for the method of installing optional parts.
Parts name Model No. Application
Wired remote controller (*1) UTY-RNR
Z
For air conditioner operation
(2-wire type)
UTY-RCRYZ1
UTY-RLR
Simple remote controller (*1) UTY-RSR
UTY-RHR
Communication kit UTY-TWRXZ3 For the installation of optional wired
remote controller.
External connect kit UTY-XWZXZ5 For control input/output port
WLAN adapter UTY-TFSXZ1 For wireless LAN control
Half concealed kit UTR-STA
For fill the gap between the Wall
hole and the indoor unit
Modbus converter UTY-VMSX
Only one communication converter
can be connected.
KNX convertor UTY-VKSX
• Optional parts are subject to change without notice.
*1: Optional Communication kit (UTY-TWRXZ3) is necessary for installation.
9378533080-04_IM.indb 49378533080-04_IM.indb 42022/2/14 15:13:132022/2/14 15:13:13
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