FLA: Full Load Amps
Abbreviations:
MCA: Minimum Circuit Amps
kW: Rated motor output
Table 6.2 Indoor units electrical characteristics
MFA: Maximum Fuse Amps
IFM: Indoor Fan Motor
Table 6.1
Capacity
IFM
Hz
Volts
MCA MFA
kW
FLA
2.8kW
0.41
15
0.08
0.33
0.41
15
0.08
0.33
4.5kW
0.56
15
0.08
0.45
5.6kW
0.56
15
0.08
0.45
7.1kW
0.56
15
0.08
0.45
8.0kW
0.76
15
0.08
0.61
0.88
15
0.17
0.70
10.0kW
1.00
15
0.17
0.80
11.2kW
1.00
15
0.17
0.80
14.0kW
1.20
15
0.17
0.96
Power supply
3.6kW
9.0kW
Power supply
Breakers with
current leakage
All-pole disconnection
device with leakage
protector
L N
Pull box
Indoor unit
Indoor unit
Indoor unit
Pull box
Pull box
220-240V~50/60Hz
:
Copper wire
Proper power wiring connections
POWER IN
L
N
Wire slot
Indoor power
supply
Outdoor power
supply
Indoor unit
Communication wire between
indoor and outdoor units
Grounding line
Grounding line
RCCB
RCCB
Figure 6.1
Figure 6.2
4
.
6
e
r
u
g
i
F
3
.
6
e
r
u
g
i
F
6.1 Power Cord Connection
6.3 Communication Wiring
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 6.3).
If circular wiring terminal with the insulation casing cannot 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 6.4).
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 6.2 shows the power supply terminal of the indoor unit.
Refer to Tables 6.1 and 6.2 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.
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.
+
Power cord
Insulation tube
Circular wiring
terminal
Figure 6.5
6.2 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.
6.3.1 Communication wiring between the indoor and outdoor units
The indoor and outdoor units communicate via the RS485 serial port.
The communication wiring between the indoor and outdoor units should
be connected one unit after another in a daisy chain from the outdoor
unit to the final indoor unit.And the shielded layer must be properly
grounded, and a build-out resistor must be added to the last indoor unit
to enhance the stability of the communication system (see Figure 6.6).
Incorrect wiring such as a star connection or a closed ring will cause
instability of the communication system and system control anomalies.
Use a three core shielded wire (greater than or equal to 0.75 mm )
for the communication wiring between the indoor and outdoor units.
Make sure the wiring is connected correctly. The connecting lead for
this communication wire must come from the master outdoor unit.
11
Model
2.8-14.0 kW
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
220-240V~50Hz
Indoor unit
Indoor unit
Pull box
Shielded
*
* Please refer to the corresponding wired controller manual for the wired
controller wiring.
2
" "
50/60
50
220-240V
V.2