Communications Wiring; Figure 15; Th-Tune Power And Communication Connections; Wall Unit And Th-Tune Power And Communications Connections - Bard W18AAPA Installation Instructions Manual

Multi-tec/th-tune; free cooling unit system; multi-tec wall-mount air conditioner
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FIGURE 15

th-Tune Power and Communications Connections

Wall Unit and th-Tune Power and Communications Connections

WALL UNIT
Tx/Rx+
Tx/Rx-
G0
G
Communications
Power
FIGURE 16
FIGURE 17

Proper Communication Connector Placement

Terminal Block Label
NOTE: A right-hand unit is shown. On
left-hand units, the th-Tune terminal
block is on opposite side of control
board. Make connections according
to the terminal block label. Damage
will occur is power is applied to the
communications terminals.
Terminal Block for
Connecting to th-Tune
Green Connector Position
for LC6000 Operation
Place Green Connector
Here for th-Tune Operation

Communications Wiring

For the communications wiring, use 3-wire 20 gauge
shielded cable.
When wiring communication for the th-Tune, the
green connecter plugged into the wall unit PLC
board (with the jumper leads that connect from the
communications terminal block as shown in Figure 17),
will need to be moved from Fieldbus 2, to Fieldbus 1.
TH-TUNE
(see Figure 5)
GND
Rx+/Tx+
Rx-/Tx-
GND
24V~/m
MIS-3912
* If power is connected to these terminals,
the th-Tune will be damaged.
Communications*
Power
Manual
2100-678
Page
21 of 24

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