Phau Ntawv Qhia

En-3
2.4. Cassette grille accessories
Name and Shape
Q’ty Description
Connector cover
1
For covering connector
Tapping screw
(M5 × 12 mm)
4
For mounting cassette grille
Tapping screw
(M4 × 12 mm) 1
For mounting connector 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 met-
als)
Screw [pitch large]
(M4 × 10 mm)
4
For mounting the L angle and hook
wire (for resins)
The following items are necessary to install this air conditioner. (The items are not includ-
ed 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
2.5. Pipe requirement
CAUTION
• 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 0.004 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)] Thickness [in (mm)]
1/4 (6.35) 0.032 (0.80)
3/8 (9.52) 0.032 (0.80)
1/2 (12.70) 0.032 (0.80)
5/8 (15.88) 0.039 (1.00)
3/4 (19.05) 0.047 (1.20)
CAUTION
Refer to the installation manual for the outdoor unit for description of allowable pipe
length and height difference.
Model
Diameter [in (mm)]
Liquid Gas
09,12 1/4 (6.35) 3/8 (9.52)
18 1/4 (6.35) 1/2 (12.70)
• 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 248 °F
(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 9/16 in (15 mm) or more.
If the expected humidity is higher than 80 %, use heat insulation that has a
thickness of 13/16 in (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 68 °F
(20 °C)).
2.6. 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
(AWG)
Remarks
Connection cable AWG 14
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.
2.7. Optional parts
Refer to each installation manual for the method of installing optional parts.
Parts name Model No. Application
Wireless remote controller UTY-LNTU For air conditioner operation
Wired remote controller UTY-RNRUZ*
For air conditioner operation
(2-wired type)
Simple remote controller
UTY-RSRY
For air conditioner operation
(2-wired type)
UTY-RHRY
Fresh air intake kit UTZ-VXAA To take fresh air
Air outlet shutter plate UTR-YDZB
Install the plate at outlet when carrying
out 3-way direction operation
Insulation kit for High hu-
midity
UTZ-KXGC
Install when the condition under the roof
is over 80% in humidity and over 86°F
(30°C) in temperature.
External input and output
PCB / Box
UTY-XCSX
For external input and output
UTZ-GXEA
External connect kit UTY-XWZXZG For external output port
W-LAN interface UTY-TFSXZ2 For wireless LAN interface
Modbus converter -
Refer to Design & Technical manual.
KNX convertor -