Figure 21; Figure 21 Thermostat Connections - Bard Q-TEC Q A4D Series Installation Instructions Manual

SC SC SC
Completestat
Model #CS9B-THOA or
Model #CS9BE-THOA
24V
COM G
6
Thermostat
R C G
Bard #8403-060
Unit Low
R RT C G
Voltage
Term. Strip
1
12-Pin 9 6 3
Vent Plug
If not equipped with a ventilation option to plug in, a jumper plug must be installed.
Factory installed jumper. Remove jumper and connect
1
to N.C fire alarm circuit if emergency shutdown required.
2 Wire not needed below 15KW.
Wire required for dehumidification models only.
3
4 Do not connect "A" from thermostat if optional CO2 controller is used
0-10 VDC modulating C02 control signal for modulating ventilation
5
control (optional for ECON only - see vent instruction manuals)
Manual 2100-752C
Page 24 of 41
Thermostat Connections
Y1 Y2 O/B W2
W1/E
2
Y1 Y2 O/B W2
W1/E
2
7
Y1 Y2 W2
W3
B/W1
9
2 5 11
ALL VENT OPTIONS PLUG IN HERE
6
7
8
9 A 2-stage thermostat is recommended for Balanced Climate mode.

FIGURE 21

L A D GND
4 3
L A
YO/D
4
3
L A D 1 2 3
7
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.
Install jumper for 1 stage electric heat on units with more than 10KW
Do not add these wires if setting up for modulating control. See note 5.
Factory installed jumper. Remove jumper to activate Balanced Climate™ mode.
not present if economizer is factory installed. Units with economizers have balanced
climate jumper in economizer, refer to economizer manual.
5
Optional CO2 Controller
Bard Part #8403-096
1
24VAC
2
3 CO2 OUT
4 TEMP-OUT
4 5 6
5
6
8
4 12 10
Y1 Y2 jumper
MIS-3974 D