Table of Contents
Advertisement
+
Figure 6.3
6.2 Electrical Wiring Specifications
220-240V~50/60Hz
220-240V~50Hz
Power supply
L
N
Breakers with
current leakage
All-pole disconnection
device with leakage
protector
Indoor unit
Refer to Table 6.1 for the specifications of the power cord and communication
wire. A wiring capacity that is too small will cause electrical wiring overheating,
and lead to accidents when the unit burns and becomes damaged.
Table 6.1
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 6.2 Indoor units electrical characteristics
Capacity
Hz
2.2kW
2.8kW
3.6kW
50
220 - 240
4.5kW
50/60
5.6kW
7.1kW
8.0kW
Abbreviations:
MCA: Minimum Circuit Amps
MFA: Maximum Fuse Amps
IFM: Indoor Fan Motor
kW: Rated motor output
FLA: Full Load Amps
1. Select the wire diameters( minimum value) individually for each
unit based on the table 6.3.
2. Maximum allowable voltage range variation between phases is
2%.
Circular wiring
terminal
Proper power wiring connections
Insulation tube
Power cord
Figure 6.4
Indoor unit
Indoor unit
Pull box
Pull box
Pull box
Indoor unit
Indoor unit
Figure 6.5
2.2-8.0kW
1-phase
220-240V~50Hz
220-240V~50/60Hz
Shielded
3×AWG16-AWG18
Shielded
AWG16-AWG20
15A
Power supply
IFM
Volts
MCA
MFA
kW
0.49
15
0.1
0.55
15
0.1
0.55
15
0.1
0.55
15
0.1
0.85
15
0.1
1.4
15
0.1
1.4
15
0.1
3. Select circuit breaker that having a contact separation in all poles
：Copper wire
not less than 3 mm providing full disconnection，where MFA is
used to select the current circuit breakers and residual current
operation breakers:
Table 6.3
Rated current
of appliance（A）
≤3
>3
and
≤6
>6
and
≤10
>10
and
≤16
>16
and
≤25
>25
and
≤32
>32
and
≤50
>50
and
≤63
Warning
Refer to local laws and regulations when deciding on the dimen-
sions for the power cords and wiring. Get a professional to select
and install the wiring.
6.3 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.
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.
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
connect 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
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.
All shielded wiring in the network are interconnected, and will eventually
connect to earth at the same point
Outdoor unit
（P Q E）
FLA
0.39
0.44
（P Q E）
Indoor and outdoor
units Communication
0.44
wire
0.44
P
Only the last indoor unit requires adding the build-out resistor at P and Q.
0.68
Q
1.1
(open)
1.1
6.3.2 Communication wiring between the indoor unit and wired
controller
The wired controller and the indoor unit can be connected in different manners,
depending on the forms of communication.
1) For a bidirectional communication mode:
w
Use 1 wired controller to control 1 indoor unit or 2 wired controllers
(one master and one slave controller) to control 1 indoor unit (see Figure 6.7);
w
Use 1 wired controller to control multiple indoor units or 2 wired controllers
(one master and one slave controller) to control multiple indoor units
(see Figure 6.8);
8
Nominal cross-sectional area (mm
Flexible cords
Cable for fixed wiring
0.5
and
0.75
0.75
and
1
1
and
1.5
1.5
and
2.5
2.5
and
4
4
and
6
6
and
10
10
and
16
"
"
.
(Connect the shielded end of the shielded wire to the electronic
controller box sheet metal "
" here)
Signalling line between outdoor units
Connecting the shielded layer of the shielded wire
Figure 6.6
)
2
2.5
1
to
2.5
1
to
2.5
1
to
4
1.5
to
6
2.5
to
10
4
to
16
6
to
25
10
to
) for the
2
Advertisement
Table of Contents
