Manual 2100-689J
Page
20 of 42
FIGURE 9
Thermostat Connections
CO2 OUT
Optional CO2 Controller
Bard Part #8403-096
6
5
4
3
2
1
TEMP-OUT
24VAC
W3
6
5
4
2
1
R
Unit Low
Voltage
Term. Strip
W2
C
G
RT
Y1
Y2
B/W1
L
D
A
3
not present if economizer is factory installed. Units with economizers have balanced
Y1 Y2 jumper
climate jumper in economizer, refer to economizer manual.
Factory installed jumper. Remove jumper to activate Balanced Climate™ Mode.
A 2-stage thermostat is recommended for Balanced Climate mode.
9
5 Do not add these wires if setting up for modulating control. See note 6.
Jumper needs added.
7
2B Install Jumper for 1 stage electric heat on units with more
than 10KW.
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.
2A
Wire required for dehumidification models only.
1
Thermostat will not work with units equipped with economizers.
8
6
10
12
11
9
4
12-Pin
Vent Plug
2
3
5
7
6
ALL VENT OPTIONS PLUG IN HERE
4
2A
3
W
Rc
C
R
G
Y
Y2
W2
4
3
5
6
Mechanical Humidistat
8403-038
Electronic Humidistat
Units With Dehumidification
8403-047
8403-092
T4 Pro 8403-089
W
C
Rc
Y
R
G
O
B
7
If not equipped with a ventilation option to plug in, a jumper plug must be installed.
T6 Pro 8403-090
1
8
2B
5
9
MIS-3975 E
