Trane Tracer ZN521 Installation And Operation Manual page 21

Figure 8. Two-pipe hydronic-heating unit
Occupancy (open=occupied)*
Condensate overflow (closed=normal)*
Low-coil-temperature detection
(closed=normal)*
H
24 Vac
N
LonTalk
CNT-SVX07D-EN
Input/output functions and wiring for typical applications
Fan status (closed=on)*
Entering water
temperature
Discharge air
temperature
†
24 V
Fan, high speed
†
24 V
Exhaust (or fan, medium speed)
†
24 V
Fan, low speed
†
24 V
Heating valve
24 V
Outdoor air damper actuator
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
Generic/baseboard heat
LonTalk
in
out
21