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7. Electrical Wiring
Warning
• All the supplied parts, materials and electrical works must comply with local
regulations.
• Use only copper wires.
• Use a dedicated power supply for the air-conditioners. The power voltage
must be in line with the rated voltage.
• The electrical wiring works must be carried out by a professional technician,
and must comply with the labels stated in the circuit diagram.
• Before the electrical connection works are carried out, turn off the power
supply to prevent injuries caused by electric shock.
• The external power supply circuit of the air conditioner must include an earth
line, and the earth line of the power cord connecting to the indoor unit must
be securely connected to the earth line of the external power supply.
• Leakage protective devices must be configured according to the local
technical standards and requirements for electrical and electronic devices.
• The fixed wiring connected must be equipped with an all-pole disconnection
device with a minimum 3 mm contact separation.
• The distance between the power cord and signalling line must be at least 300
mm to prevent the occurrences of electrical interference, malfunction or
damage to electrical components. At the same time, these line must not
come in contact with the piping and valves.
• Choose electrical wiring that conforms to the corresponding electrical
requirements.
• Connect to the power supply only after all the wiring and connection works
have been completed, and carefully checked to be correct.
7.1 Power Cord Connection
Use a dedicated power supply for the indoor unit that is different
from the power supply for the outdoor unit.
Use the same power supply, circuit breaker and leakage protective
device for the indoor units connected to the same outdoor unit.
Outdoor power
supply
RCCB
Grounding line
Grounding line
Indoor power
supply
RCCB
Communication wire between
indoor and outdoor units
Figure 7.1
Figure 7.2 shows the power supply terminal of the indoor unit.
POWER IN
Figure 7.2
When connecting to the power supply terminal, use the circular wiring
terminal with the insulation casing (see Figure 7.3).
Use power cord that conforms to the specifications and connect
the power cord firmly. To prevent the cord from being pulled out by
external force, make sure it is fixed securely.
If circular wiring terminal with the insulation casing can not be used,
please make sure that:
•
Do not connect two power cords with different diameters to the
same power supply terminal (may cause overheating of wires due
to loose wiring) (See Figure 7.4).
+
F
g i
u
e r
7
3 .
Wire slot
Indoor unit
N
L
: Copper wire
Circular wiring
terminal
Proper power wiring connections
Insulation tube
Power cord
F
g i
u
e r
7
4 .
7.2 Electrical Wiring Specifications
220-240V~50Hz
220-240V~50/60Hz
Power supply
L
N
Breakers with
current leakage
All-pole disconnection
device with leakage
protecto
Indoor unit
Figure 7.5
Refer to Tables 7.1 and 7.2 for the specifications of the power cord
and communication wire. A wiring capacity that is too small will
cause the electrical wiring to become too hot, and lead to accidents
when the unit burns and becomes damaged.
Table 7.1
Model
Phase
Power
supply
Volt and frequency
Communication wire between
indoor and outdoor units
Communication wire between
indoor unit and wired controller
Field fuses
* Please refer to the corresponding wired controller manual for the wired
controller wiring.
Table 7.2 Indoor units electrical characteristics
Ppwer supply
Capacity
Hz
2.2kW
2.8kW
3.6kW
4.5kW
5.6kW
50
220-240
50/60
7.1kW
8.0kW
9.0kW
11.2kW
14.0kW
Abbreviations:
MCA: Minimum Circuit Amps
MFA: Maximum Fuse Amps
IFM: Indoor Fan Motor
kW: Rated motor output
FLA: Full Load Amps
Warning
Refer to local laws and regulations when deciding on the dimensions for the
power cords and wiring. Get a professional to select and install the wiring.
7.3 Communication Wiring
Use only shielded wires for the communication wiring. Any other
type of wires may produce a signal interference that will cause the
units to malfunction.
Do not carry out electrical works like welding with the power on.
All shielded wiring in the network are interconnected, and will
eventually connect to earth at the same point
Do not bind the refrigerant piping, power cords and communication
wiring together. When the power cord and communication wiring
are parallel, the distance between the two lines must be 300 mm or
more in order to prevent signal source interference.
32
Communication wiring must not form a closed loop.
Indoor unit
Pull box
Pull box
Pull box
Indoor unit
Indoor unit
2.2-14.0kW
1-phase
220-240V~50Hz
220-240V~50/60Hz
Shielded 3×AWG16-AWG18
Shielded
AWG16-AWG20
*
15A
Volts
MCA
MFA
KW
0.74
15
0.03
0.74
15
0.03
0.77
15
0.03
1
15
0.03
1
15
0.03
1.1
15
0.06
1.3
15
0.15
1.3
15
0.15
1.5
15
0.15
2.6
15
0.15
"
"
.
IFM
FLA
0.59
0.59
0.62
0.8
0.8
0.88
1.04
1.04
1.2
2.08
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