mundoclima MVD DC2 Manual De Instalación Y Usuario página 29

Table 6.2 Indoor units electrical characteristics
Capacity
Hz
3.6kW
4.5kW
5.6kW
7.1kW
50
220-240
50/60
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.
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.
 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.
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
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.
Power supply IFM
MCA
Volts MFA kW
0.45
15 0.1
1.2 15 0.1
1.2
15 0.1
1.2 15 0.1
1.3 15 0.1
1.3
15 0.1
1.7 15
0.1+0.1
1.7 0.1+0.1
15
.
Outdoor
unit
(P Q E)
FLA
0.35
(P Q E)
0.93
Communication line
between indoor and
0.95
outdoor units
0.95 Only the last indoor unit requires adding the build-out
P
resistor at P and Q.
1.1
Q
1.1 (open)
0.65+0.65
0.65+0.65
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:
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);
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);
Wired controller 1
Master wired controller
WDC-120GWK (CL97810)
WDC-86E/KD (CL97811)
Indoor unit 1
)
2
Wired c ontroller 1
Master wired controller
WDC-120GWK (CL97810)
27
(Connect the shielded end of the shielded wire to the
electronic controller box sheet metal "
Signalling line between
outdoor units
Connecting the shielded
layer of the shielded wire
Figure 6.6
X1 X2
Indoor unit 1
Wired controller 2
Slave wired controller
WDC-120GWK (CL97810)
WDC-86E/KD (CL97811)
Figure 6.7
Indoor unit 2
Slave wired controller
Figure 6.8
" here)
Indoor unit n(n<=16)
Wired c ontroller 2
WDC-120GWK (CL97810)