SYSVRF2 DUCT IM

7. Electrical Wiring
10
FLA: Full Load Amps
Abbreviations:
MCA: Minimum Circuit Amps
kW: Rated motor output
Table 7.2 Indoor units electrical characteristics
MFA: Maximum Fuse Amps
IFM: Indoor Fan Motor
Table 7.1
Warning
7.1 Power Cord Connection
7.3 Communication Wiring
• 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.
7.2 Electrical Wiring Specifications
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.
: Copper wire
Proper power wiring connections
POWER IN
Figure 7.1
Figure 7.2
4.7 erugiF3.7 erugiF
 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.
When connecting to the power supply terminal, use the circular wiring
terminal with the insulation casing (see Figure 7.3).
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).
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.
Figure 7.2 shows the power supply terminal of the indoor unit.
+
Power cord
Insulation tube
Circular wiring
terminal
Wire slot
Indoor power
supply
Outdoor power
supply
Communication wire between
indoor and outdoor units
Grounding line
Grounding line
RCCB
RCCB
Figure 7.5
Power supply
Breakers with
current leakage
All-pole disconnection
device with leakage
protector
L N
Indoor unit
Pull box
Indoor unit Indoor unit Indoor unit
Pull boxPull box
220-240V~50/60Hz
220-240V~50Hz
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.
Model 2.2-14.0kW
Power
supply
220-240V~50Hz
220-240V~50/60Hz
Communication wire between
indoor and outdoor units
Shielded 3×AWG16-AWG18
Communication wire between
indoor unit and wired controller
AWG16-AWG20
Field fuses 15A
Phase
Volt and frequency
1-phase
Shielded
*
*
Please refer to the corresponding wired controller manual for the wired
controller wiring.
Hz Volts MCA MFA KW FLA
2.2kW 0.74 15 0.03 0.59
2.8kW 0.74 15 0.03 0.59
3.6kW 0.77 15 0.03 0.62
4.5kW 1 15 0.03 0.8
5.6kW 1 15 0.03 0.8
7.1kW 1.1 15 0.06 0.88
8.0kW 1.3 15 0.15 1.04
9.0kW 1.3 15 0.15 1.04
11.2kW 1.5 15 0.15 1.2
14.0kW 2.6 15 0.24 2.08
Capacity
Power supply IFM
50
50/60
220-240
 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.
 Communication wiring must not form a closed loop.
" "
Indoor unit
L N