Bard CH Series - Figure 20 Thermostat Connections

Manual 2100-769A
Page 27 of 50
FIGURE 20
Thermostat Connections
CO2 OUT
Optional CO2 Controller
Bard Part #8403-096
6
5
4
3
2
1
TEMP-OUT
24VAC
W3
65421R
Unit Low
Voltage
Term. Strip
W2C GRT Y1 Y2
B/W1
L DA 3
8403-100 needs to be configured for dehumidification operation. See user's
5
Do not add these wires if setting up for modulating control. See note 6.
Jumper needs added.7
0-10 VDC Modulating CO2 control signal for modulating ventilation control
(Optional for ECON Only) - See vent installation manual.
6
For vent operation, add jumper if optional CO2 controller is not used.
Vent will run while blower is energized.
For ECON & CRV-V, an additional wire change is required.
See install manual
4
Factory installed jumper. Remove jumper and connect
to N.C fire alarm circuit if emergency shutdown required.
3
Wire not needed below 15KW.
2
Wire required for dehumidification models only.
1
8
manual for instructions.
6
1012
119
4
12-Pin
Vent Plug
23 5 7
T6 Pro 8403-090
MIS-4426
Mechanical Humidistat
1
6
ALL VENT OPTIONS PLUG IN HERE
4
2
O/BRc C G Y
E
If not equipped with a ventilation option to plug in, a jumper plug must be installed.
R Y2
8403-038
AUX
or 8403-092
Units With Dehumidification
3
5
7
8
RC
8403-047 or 8403-100
Electronic Humidistat