Indoor Unit - mundoclima MVD DC2 Manual De Instalación Y Usuario

Table 6.2 Indoor units electrical characteristics
Capacity
Hz Volts
2.2kW 50/60 220-240
2.8kW 50/60 220-240
3.6kW 50/60 220-240
4.5kW 50/60 220-240
5.6kW 50/60 220-240
7.1kW 50/60 220-240
8.0kW 50/60 220-240
9.0kW 50/60 220-240
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
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.
Outdoor
(Connect the shielded end of the shielded wire to the
unit
electronic controller box sheet metal "
Signalling line
(P Q E)
between outdoor units
Connecting the shielded
layer of the shielded wire
(P Q E)
Indoor and
outdoor units
Communication wire
Only the last indoor unit requires adding
P
the build-out resistor at P and Q.
Q
(open)
Figure 6.6
Power supply IFM
MCA MFA kW FLA
0.32 15
0.02 0.25
0.32 15
0.02 0.25
0.45 15
0.058 0.36
0.47 15
0.058 0.37
0.58 15
0.058 0.46
0.90 15
0.06 0.72
0.90 15
0.06 0.72
1.1 15
0.06 0.88
" here)
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);
(2.2/2.8kW )

Indoor unit 1

(3.6~9.0kW )
Wired controller 1
Master wired controller
WDC-120GWK (CL97810)
WDC-86E/KD (CL97811)
Indoor unit 1
(7.1~9.0kW )
X1 X2
Wired controller 1
Master wired controller
WDC-120GWK (CL97810)
For a unidirectional communication mode:
2 )
Use 1 wired controller to control 1 indoor unit (see Figure 6.9).
Indoor unit 1
25
Wired controller 2
Slave wired controller
WDC-120GWK (CL97810)
WDC-86E/KD (CL97811)
Figure 6.7
Indoor unit 2
Indoor unit n(n<=16)
(3.6~5.6kW )
E
X1 X2
Wired controller 2
Slave wired controller
WDC-120GWK (CL97810)
Figure 6.8
Display board
A
B
C
D
Wired controller 1
KJR-29B1/BK-E (CL92869)
KJR-86C-E (CL92870)
Figure 6.9
(2.2/2.8kW )