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108 VAV-PRC011M-EN
DDC Controls
Factory or Field Mounted Auxiliary Temperature Sensor
Factory or Field Mounted Auxiliary Temperature Sensor
Sensing Element
Thermistor 10,000 Ohms @ 77°F (25°C)
Operating Environment
-4 to 221°F (-20 to 105°C), 5%-95%RH
Non-Condensing
Wiring Connection
8 ft 18 awg
Sleeving for wire leads is acrylic #5 awg grade C rated @ 155°C
Probe Dimensions
3.4" long x 5/16" diameter
(86 mm x 7.9 mm diameter)
Mounting
In any position on duct.
Mount the sensor to the duct using
#10 x ¾" (19.05 mm) sheet metal screws.
Factory Mounted Discharge Air Temperature Sensing Matrix
The auxiliary temperature sensor is used in conjunction with the Trane DDC
controller to sense duct temperature. When the DDC controller is used with
a Building Automation System, the sensor temperature is reported as status
only. When the DDC control is used as stand alone configuration and the
sensor is placed in the supply air duct, the sensor determines the control
action of the UCM in a heat/cool changeover system.
When factory mounted, the sensor is terminated. If sensor is field mounted,
it is shipped loose and is terminated in the field.
The sensing matrix consists of (2) probes factory installed in the unit reading
an average of 4 points within the unit discharge. Traditional single point
temperature sensors are more of a heat on/off indicator than an accurate
temperature due to stratification in the duct work. The new sensing matrix
provides a factory installed accurate discharge temp. Additionally, when
coupled with SCR heat and UC210 or UC400 controls, the energy efficient
dual max algorithm can be used to reduce energy costs.
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