VCB-X Controller Field Technical Guide
INSTALLATION & WIRING
27
Outdoor Air Temperature Sensor Wiring
OE250
Outdoor Air
Temperature Sensor
AI3
GND
Make Splice Connections
Inside Sensor Enclosure
As Shown. Seal All Conduit
Fittings With Silicone
Sealant
Mount Sensor Outdoors
In Shaded Protected
Area & In Upright
Position As Shown
VCB-X Controller
Outdoor Air Temperature Sensor
The OE250 Outdoor Air Temperature Sensor must be wired as shown
for proper operation of the VCB-X Controller. The Outdoor Air
Temperature Sensor is a 10K Type III thermistor sensor. The sensor
should be mounted in the upright position as shown in an area that
is protected from the elements and direct sunlight. Be sure to make
the wiring splices inside of the Outdoor Air Temperature Sensor
weather-tight enclosure. See
Figure 13
below for details.
Figure 13: OE250 – Outdoor Air Temperature Sensor Wiring
For applications involving Outdoor Air Humidity, the OE265-15-A
E-BUS Outside Air & Humidity Sensor must be used instead. See
Figure 14
for details.
CAUTION:
Be sure to mount the Outdoor Air Temperature
Sensor in an area that is not exposed to direct
sunlight. The shaded area under the HVAC unit
rain hood is normally a good location. Unused
conduit opening(s) must have closure plugs
installed and must be coated with sealing com-
pound to provide a rain-tight seal. Water can
damage the sensor.
