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12 VAV-PRC003-EN
Features and
Benefits
Figure 14. Zone occupancy sensor
Figure 12. Wall-mounted CO
2
sensor
CO
2
Sensor
Wall- and duct-mounted carbon dioxide
(CO
2
) sensors are designed for
demand-controlled ventilation zone
applications. The sensor is compatible
with VariTrane VAV and VariTrac
controllers. The Trane CO
2
sensors
measure carbon dioxide in parts-per-
million (ppm) in occupied building
spaces. Carbon dioxide measurements
are used to identify under-ventilated
building zones. Outdoor airflow
increases beyond design ventilation
rates if the CO
2
exceeds specified levels.
CO
2
Zone Sensor Summary
• Use with the UCM CO
2
input for
demand control ventilation
• Silicone-based NDIR sensor technology
for long-term stability
• Measurement range of 2000 ppm CO
2
input with an output of 0–10 Vdc
• Wall-mount transmitter is compact and
aesthetic in appearance
• Optional zone return duct-mount
transmitter is available
Zone Occupancy Sensor
The energy-saving zone occupancy
sensor is ideal for zones having
intermittent use during the occupied
mode. The sensor sends a signal to the
VAV controller upon detection of
movement in the coverage area. The
VAV system then changes the zone
from occupied standby mode to
occupied mode.
Occupancy Zone Sensor Summary
• Compatible with VariTrane VAV and
VariTrac controllers
• Used with zone damper UCM for
controlling the occupied standby
function
• Ceiling-mount PIR occupancy sensor
detects motion over an adjustable
range up to 360 degrees
• Single detector covers up to 1200
square feet. For areas larger than 1200
square feet, multiple sensors can be
wired in parallel
• Adjustable time delay avoids nuisance
change of state on loss of detection
• Adjustable sensitivity
• SPDT isolated contacts connect to
UCM input
Figure 15. Auxiliary temperature
sensor
Figure 13. Duct-mounted CO
2
sensor
Auxiliary Temperature Sensor
The auxiliary temperature sensor is
used with any UCM damper control.
The sensor allows the operator to
monitor duct temperature or air
temperature leaving a reheat device at
the zone damper. This sensor is used
for automatic changeover of a UCM
damper when not using a CCP. The
auxiliary temperature sensor is ideal for
remote monitoring and diagnostics
from the CCP operator display.
Auxiliary Temperature Sensor Summary
• Thermistor sensing element 10,000
Ohms @ 77°F
• Wiring connection 8 feet, 18 awg
• Sleeving for wire leads is acrylic #5 awg
grade C rated @ 155C