Trane Tracer ZN521 Installation And Operation Manual page 25

Figure 12. Two-pipe heating unit with DX cooling
Condensate overflow (closed=normal)*
Low-coil-temperature detection
(closed=normal)*
H
24 Vac
N
GND
On
Cancel
CNT-SVX07D-EN
Input/output functions and wiring for typical applications
Fan status (closed=on)*
Occupancy (open=occupied)*
24V 24V 24V BI1 BI2
AC POWER BINARY INPUTS
ZONE SENSOR
SERVICE
PIN LED ZN GND SET FAN GND
1
2
3
4
Entering water
5
LonTalk
temperature
6
Discharge air
temperature
†
24 V
Fan, high speed
†
24 V
Exhaust (or fan, medium speed)
24 V
Fan, low speed
BI3 BI4 1 2 3 4
BINARY OUTPUTS
ANALOG INPUTS
AI1 AI2 AI3 +20 AI4
AI4 input: See
Figures Step 5
and Step 6
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
DX cooling
†
24 V
Heating valve
†
24 V
Outdoor air damper actuator
†
24 V
Generic/baseboard heat
5 6 7 8 9 10 STATUS
LED
COMM5
COMM5
GND A B A B LED
on
LonTalk
in
out
25