Bard W42HC-A - Figure 21 Non-Programmable Thermostat Connections

Manual 2100-711C
Page 22 of 45
FIGURE 21
Non-Programmable Thermostat Connections
CO2 OUT
Optional CO2 Controller
Bard Part #8403-067
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
Factory installed jumper. Remove jumper to activate Balanced Climate™ Mode.
A 2-stage thermostat is recommended for Balanced Climate mode.
10
5
Do not add these wires if setting up for modulating control. See note 6.
7
Jumper needs added.8
For 8403-058, change "system type", set up Function 1, From 5 (2 Heat/ 1 Cool heat Pump)
to 6 (2 Heat / 2 Cool Conventional). For 8403-059, No change required.
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
Thermostat will not work with units equipped with economizers.9
6
1012
119
4
12-Pin
Vent Plug
23 5 7
8
ALL VENT OPTIONS PLUG IN HERE
4
2
O/BRc CR G Y Y2
AUX
4
35
6
8403-038
6
Electronic Humidistat
Mechanical Humidistat
or T4 Pro 8403-089
BCRc YR G
O
W
8403-047
Units With Dehumidification
3
If not equipped with a ventilation option to plug in, a jumper plug must be installed.
1
8403-057
(TH311OD1040)
7
E
9
5
10
MIS-4064 B
8403-058
(TH522OD1151)
8403-059
(TH522OD1219/U)
or T6 Pro 8403-090
or 8403-092