Bard W42AC-A - Page 58

Manual 2100-692H
Page 22 of 44
FIGURE 20
Programmable Thermostat Connections
Thermostat
W1/E
A
YO/D
LO/BY2Y1R GC W2
Bard #8403-060
6
1012
119
4
12-Pin
Vent Plug
23 5 7
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
not present if economizer is factory installed. Units with economizers have balanced
Install jumper for 1 stage electric heat on units with more than 10KW
Y1 Y2 jumper
climate jumper in economizer, refer to economizer manual.
Factory installed jumper. Remove jumper to activate Balanced Climate™ mode.
8
7
6
Do not connect "A" from thermostat if optional CO2 controller is used
0-10 VDC modulating C02 control signal for modulating ventilation
control (optional for ECON only - see vent instruction manuals)
5
Change model configuration from heat pump to heat/cool. Must be configured to programmable
and fan set to be programmed fan for the "A" output to function during scheduled occupied
periods. Must be configured for multi-stage for Y1 output to be active 1st stage cooling. For
dehumidification, must be configured for "No Economizer" for YO/D to be active for humidity
control.
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
Do not add these wires if setting up for modulating control. See note 5.
9
A 2-stage thermostat is recommended for Balanced Climate mode.
W1/E
SC
SC
SC
Completestat
Model #CS9B-THOA or
Model #CS9BE-THOA
W2
COM
G
24V
Y1 Y2 O/B L DA GND
MIS-3974
ALL VENT OPTIONS PLUG IN HERE
2
3
3
1
6
D
4
5
7
If not equipped with a ventilation option to plug in, a jumper plug must be installed.
4
2
8
9