Trane Tracer ZN521 Installation And Operation Manual page 26

Input/output functions and wiring for typical applications
Figure 13. Electric heat unit with DX cooling
Occupancy (open=occupied)*
Condensate overflow (closed=normal)*
Low-coil-temperature detection
(closed=normal)*
H
24 Vac
N
GND 24V
AC POWER
SERVICE
PIN
1
2
3
On
4
Cancel
5
LonTalk
6
26
Fan status (closed=on)*
24V 24V BI1 BI2 BI3
BINARY INPUTS
ZONE SENSOR
LED ZN GND SET FAN GND AI1
Entering water
temperature
Discharge air
temperature
†
24 V
Fan, high speed
†
24 V
Exhaust
24 V
DX cooling
BI4 1 2 3 4 5 6
BINARY OUTPUTS
ANALOG INPUTS
AI2 AI3 +20 AI4 GND A
AI4 input: See
Figures Step 5
and Step 6 on
p. 18 for wiring
options
Outdoor air or
generic temperature
* All binary inputs are configurable.
†
Connect 24 V to an AC POWER (24V) terminal.
†
†
24 V
Electric heat, stage 1 (optional)
†
24 V
Electric heat, stage 2 (optional)
†
24 V
Outdoor air damper actuator
†
24 V
Generic/baseboard heat
7 8 9 10 STATUS
LED
COMM5
COMM5
B A B
LED
LonTalk
in
out
CNT-SVX07D-EN