Manual 2100-654C
Page
18 of 34
FIGURE 9
Non-Programmable Thermostat Connections
(not for use on models equipped with an economizer)
CO2 OUT
Optional CO2 Controller
Bard Part #8403-067
6
5
4
3
2
1
TEMP-OUT
24VAC
W3/8
7
6
5
3
2
R
Unit Low
Voltage
Term. Strip
W2
C
G
RT
Y1
Y2
B/W1
L/1
D
A
4
5 Do not add these wires if setting up for modulating control. See note 7.
7
Jumper needs added.
8
For 8403-059, change "system type", set up Function 1, From 6 (2 Heat/ 1 Cool)
to 5 (2 Heat / 1 Cool Heat pump). For 8403-058, No change required.
3 Wire required for dehumidification models only.
0-10 VDC Modulating CO2 control signal for modulating ventilation control
(Optional for ECON Only) - See vent installation manual.
6
Factory installed jumper. Remove jumper and connect
to N.C fire alarm circuit if emergency shutdown required.
4
Wire not needed below 15KW.
2
For vent operation, add jumper if optional CO2 controller is not used.
Vent will run while blower is energized.
1
6
10
12
11
9
4
12-Pin
Vent Plug
2
3
5
7
4
O
6
ALL VENT OPTIONS PLUG IN HERE
R
2
AUX
E
C
G
O/B
4
3
5
6
8403-038
1 Stage Heat
Y
Electronic Humidistat
Mechanical Humidistat
8403-059
(TH311OD1040)
B
C
Rc
(TH522OD1219/U)
8403-057
R
G
Rc
W
Y
8403-047
Units With Dehumidification
3
If not equipped with a ventilation option to plug in, a jumper plug must be installed.
1
8403-058
(TH522OD1151)
1 Stage Cool
5
8
7
MIS-3822 A
1 Stage Cool
2 Stage Heat
