1-10-2
1
1-11. ELECTRICAL WIRING
General Precautions on Wiring
(1)
(4)
(5)
(6)
(7)
(8)
Before wiring, confirm the rated voltage of the unit as shown on its nameplate, then carry out the wiring closely following
the wiring diagram.
Check local electrical codes and regulations before wiring.
Also, check any specified instruction or limitations.
(2)
(3)
This equipment is strongly recommended to be installed with Earth Leakage Circuit Breaker (ELCB) or Residual Current
Device (RCD). Otherwise, it may cause electrical shock and fire in case of equipment breakdown or insulation breakdown.
Earth Leakage Circuit Breaker (ELCB) must be incorporated in the fixed wiring in accordance with the wiring regulations.
The Earth Leakage Circuit Breaker (ELCB) must be an approved 10-16 A, having a contact separation in all poles.
To prevent possible hazards from insulation failure, the unit must be grounded.
Each wiring connection must be done in accordance with the wiring system diagram.
Wrong wiring may cause the unit to misoperate or become damaged.
Do not allow wiring to touch the refrigerant tubing, compressor, or any moving parts of the fan.
Unauthorized changes in the internal wiring can be very dangerous. The manufacturer will accept no responsibility for any
damage or misoperation that occurs as a result of such unauthorized changes.
Regulations on wire diameters differ from locality to locality. For field wiring rules, please refer to your LOCAL ELECTRICAL
CODES before beginning.
You must ensure that installation complies with all relevant rules and regulations.
To prevent malfunction of the air conditioner caused by electrical noise, care must be taken when wiring as follows:
The remote control wiring and the inter-unit control wiring should be wired apart from the power supply wiring.
Use shielded wires for inter-unit control wiring between units and ground the shield on both sides.
(9) If the power supply cord of this appliance is damaged, it must be replaced by a repair shop designated by the manufacturer,
because special-purpose tools are required.
Recommended Wire Length and Wire Diameter for Power Supply System
Indoor unit
(B) Power supply
Type
Time delay fuse or
circuit capacity
2.5 mm
2
E3 Max. 30 m 10-16 A
U2 Max. 130 m 10-16 A
Control wiring
(C) Inter-unit control wiring
(between outdoor and indoor units)
(D) Remote control wiring
0.75 mm
2
(AWG #18)
0.75 mm
2
(AWG #18)
Use shielded wiring*
Max. 500 m
(E) Control wiring
for group control
0.75 mm
2
(AWG #18)
Max. 200 m (Total)Max. 1,000 m
NOTE
* With ring-type wire terminal.
WARNING
CAUTION
• 4-Way Cassette (Type U2)
When an External Air Intake Flange (ø100) is in Use
External Air Intake Volume and Resistance and
Operation Noise Characteristics within the Unit
• Calculate the operation noise when external air is being
fed by combining the noise when only external air is being
fed as shown in the graph for operation noise
characteristics and the operation noise of the unit as
stipulated in the catalogue.
• The operation noise conforms to JIS standards and
constitute measurements taken in an anechoic chamber
1.5 m directly beneath the indoor unit.
Under normal circumstances, the values shown here are
greater owing to the effects of surrounding noise and
reverberation when the unit is actually installed.
The amount of external air that is possible to feed
when it is fed directly into the unit (ø100)
Type 100 125
Permissible Air Intake
Volume (m³/h)
18
50
15
60
17
71
18 18
NOTE
The operation noise for models that use small units is lower,
so use values that are within the range shown in the above
table.
Using values that exceed these will result in noise when only
external air is fed being louder than the noise emitted from the
unit.
With the External Air Intake Flange Attached
Resistance within the Unit (Pa)
External Air Intake Volume (m
3
3
/h)
External Air Intake Volume (m /h)
Noise with only External
Air Intake dB(A)
Operation Noise
(External Air Intake Only)
0
0
10
20
30
20
30
40
50
40
50
60
70
80
90
100
5
10
15 2018
Type U2
1-10-2. External Air Intake Volume & Resistance
Within Unit / Operation Noise Characteristics
Resistance within the unit (Pa)
Noise with only External
Air Intake dB(A)
External Air Intake Volume & Resistance Within Unit/
Operation Noise Characteristics
With the External Air Intake Chamber Attached
Use the following diagram along with
the section "1-10-1. Precautions
Regarding External Air Intake".
In a Case of External Air Intake
Using Air Intake Chamber (CZ-FDU3+CZ-ATU2)
• Calculate the operation noise when external air is being
fed by combining the noise when only external air is being
fed as shown in the diagram for operation noise
characteristics and the operation noise of the unit as
stipulated in the catalogue.
•
The amount of external air that is possible to feed
when external air intake chamber is in use
(CZ-FDU3+CZ-ATU2)
* The operation noise for models that use small units is
lower, so use values that are within the range shown in
the above table. Using values that exceed these will
result in noise when only external air is fed being louder
than the noise emitted from the unit.
.
Permissible air intake
volume (m
3
/h)
The operation noise conforms to JIS standards and
constitute measurements taken in an anechoic chamber
1.5m directly below the indoor unit. Under normal
circumstances, the diagram shown above is greater owing
to the effects of surrounding noise and reverberation when
the unit is actually installed.
100
90
80
70
60
50
40
30
20
10
0
-10
500
50
40
30
20
100 150 200 240
Resistance within the unit
(High speed wind)
Operation noise
(External air intake only)
Filter chamber
(CZ-FDU3)
Kit for external air intake (for chamber)
(CZ-ATU2)
Connection duct: diameter ø100
Type
240 240
100
180
50
190
60
240
71 125
Duct (ø100) for Connecting
the External Air Intake Flange
CAUTION
SM830276-00_欧州向け R32シングル TD＆SM.indb 2 2019/02/27 11:54:21
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