
VAV-PRC011M-EN 105
DDC Controls
CO
2
Wall Sensor and Duct CO
2
Sensor
The wall- and duct-mounted carbon dioxide (CO
2
) sensors are designed for use with Trane DDC/
UCM control systems. Installation is made simple by attachment directly to the DDC/ UCM
controller. This allows the existing communication link to be used to send CO
2
data to the higher-
level Trane control system.
Wall-mounted sensors can monitor individual zones, and the duct-mounted sensor is ideal for
monitoring return air of a given unit. Long-term stability and reliability are assured with advanced
based Non-Dispersive Infrared (NDIR) technology.
When connected to a building automation system with the appropriate ventilation equipment, the
Trane CO
2
sensors measure and record carbon dioxide in parts-per-million (ppm) in occupied
building spaces. These carbon dioxide measurements are typically used to identify under-
ventilated building zones or to reduce ventilation airflow during periods of reduced occupancy to
save energy (i.e. demand-controlled ventilation).
Specifications
Measuring Range
0–2000 parts per million (ppm)
Accuracy at 77°F (25°C)
< ± (40 ppm CO
2
+ 3% of reading) (Wall only)
< ± (30 ppm CO
2
+ 3% of reading)
Recommended calibration interval
5 years
Response Time
1 minute (0–63%)
Operating Temperature
59 to 95°F (15 to 35°C) (Wall only)
23 to 113°F (-5 to 45°C)
Storage Temperature
-4 to 158°F (-20 to 70°C)
Humidity Range
0–85% relative humidity (RH)
Output Signal (jumper selectable)
4-20 mA, 0–20 mA,
0–10 VDC
Figure 7. CO
2
wall sensor (L) and duct CO
2
sensor (R)
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