Figure 1.15 Wiring: Communication Wiring - Bard W48A2PQ Installation And Service Instructions Manual

4. Communication Wiring
Connect the communication wiring from the wall-mount units to the controller in the manner shown in Figure 1.15.
The communication wire should be 2-wire, 18 gauge shielded cable with drain. Any color can be used. Be sure to
match "+" and "-" symbols on controller terminal blocks to prewired unit control terminal block (see Figures 1.17 and
1.18 on pages 26 and 27). Attach communication wire filters as shown in Figure 1.16. Use separate conduits for
communication and supply wiring.
Wall-Mount Unit
Manual 2100-642
Page 24 of 82
FIGURE 1.15
Communication Wiring
Wall-Mount Unit
Bard-Link
TM
Controller