Damper Actuators; Zone Humidity Sensor; Co2 Sensor - Trane Tracer ZN521 Installation And Operation Manual

Table 1. Tracer zone temperature sensor options
BAS
order Use
number
4190 1087 Any
4190 1088 Any
4190 1090 Any
4190 1094 Any
4190 1095 Unit
ventilator
4190 1115 Fan coil
4190 1116 Unit
ventilator
4190 1117 Any
CNT-SVX07C-EN
Fan
High Med Low Auto
x x
x x x x
x x x
x
returns the valve to normally open or closed (dependent on the desired
default position). For modulating valve control, use tri-state modulating
actuators with or without a spring return, as required by the application.

Damper actuators

Damper actuators cannot exceed 12 VA draw at 24 Vac. For control of out-
door/return air dampers, use tri-state modulating actuators that incorpo-
rate a spring return.

Zone humidity sensor

For measurement of relative humidity (RH), the Tracer ZN521 requires a
zone humidity sensor with a 4–20 mA output, where 4 mA is 0% RH and
20 mA is 100% RH. The controller provides 20 Vdc to power the zone
humidity sensor.
CO sensor
2
For CO measurement, the Tracer ZN521 requires a CO
2
20 mA output, where 4 mA = 0 ppm and 20 mA = 2000 ppm.
Zone
Setpoint
Temperature
Off thumb-
sensor
wheel
x
x
x x
x x
x x x
x x x
x x x
x x x
Additional components
Timed
override
buttons
Comm
jack
On Cancel
x x x
x x x
x
x x x
x x x
x x x
x x x
sensor with a 4–
2
5