Wiring requirements and options
CNT-SVX12C-EN 47
Figure 14. Wiring diagram for heat pump applications
LED
A BBA
+20GND
-BI2- SET-BI1- ZN
LED
GND
PIN
ZONE SENSOR
SERVICE
ANALOG INPUTS
COMM5
COMM5
24V
GND
HVAC UNIT
RhRc 1G 432 5NO 5COM
LED
STATUS5NC
BINARY INPUTS
AI1 -DAT-
24V
GND
GND
24V
OPN
CLS
BINARY OUTPUT
ECONOMIZERAC OUT
AC POWER
On
Cancel
5
4
3
2
1
+
_
GND
-AI2-
LonTalk
In
Out
Occupancy
or generic
(optional)
Compressor 1 contactor
Reversing valve
Tri-state
modulating
economizer
(optional)
Fan
H
N
24 Vac
Generic binary output (optional)
Compressor 2 contactor
G
Auxiliary heat
Power*
R
O
W1
Y1
Y2
Discharge air
temperature
LonTalk
Typical 3-wire
sensor
(optional)
Fan status or
generic
(optional)
Outdoor air
temperature
(optional)
*Terminals Rc and Rh are provided as
inputs for 24 Vac power from the con-
trolled device. If the device has a sepa-
rate heating and cooling units, use Rh
for heat and Rc for cooling. If com-
bined, use only Rc (see “HVAC unit
electrical circuit wiring” on page 82).
Dry contacts
only
Common
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