AAON AA-EBUS-DRS-TGD-01K Technical Manual - page 14
APPENDIX
E-BUS Digital Room Sensor Technical Guide
14
Connecting a Remote Sensor
Connecting a Remote Sensor
If the job requires this Sensor to be mounted outside of a conditioned
space, a remote WattMaster OE210 Space Sensor or OE231 Return
Air Temperature Sensor (or any 2-wire 10K Ohm, Type III thermistor
temperature sensor) can be hard-wired to the E-BUS Digital Room Sen-
sor. Other versions of the WattMaster space sensors (OE211, OE212,
or OE213) with slide adjust and/or override button should not be used
as the remote sensor.
Contact WattMaster Controls for wiring information if a four sensor
averaging array will be used as the “remote sensor”.
See Figure 20 for OE231 Return Air Temperature Sensor wiring. See
Figure 21, page 15 for OE210 Space Sensor wiring.
OE217-02 - E-BUS Digital Room Temperature Only
Sensor
Disconnect the modular cable from the E-BUS Digital Room Sensor
before performing the following modifi cations.
If using the OE217-02 Temperature Only version of the sensor, you must
fi rst remove the Digital Sensor’s back cover. You will see a loop of wire
hanging off of the sensor circuit board. See Figure 22, page 16. This is
the external thermistor loop wire. Clip the external thermistor loop wire
Figure 20: OE231 Return Air Temperature Sensor Wiring
MI
CR
O
C
H
IP
PIC
24HJ
25
6G
P2
06
OE217-02, OE217-03 & OE217-04
E-BUS Digital Room Sensor
Back View
Sensor Shown With
Back Cover Removed
Mount Sensor In Return Air
Duct As Shown. Route Wires
To Digital Room Sensor
Location And Connect To
Terminal Block.
Return
Air Duct
OE231 Return Air
Temperature Sensor
+12Vdc
GND
-COM
SHLD
so that the sensor will read the remote temperature input. Be sure to cut
the ends of the wire close to the circuit board so that the sensor loop wire
ends won’t short between each other. The remote sensor then wires to the
remote sensor terminal block on the back of the Digital Room Sensor.
If using the WattMaster OE210 type Space Sensor as the remote sensor,
you must clip off the C1 capacitor from the back of the OE210. Be sure to
cycle power to begin reading the remote sensor. See Figure 21, page 15.
OE217-03 & OE217-04 E-BUS Digital Room Tempera-
ture and Humidity Sensor
Disconnect the modular cable from the Digital Room Sensor before
performing the following modifi cations.
If using the OE217-03 and OE217-04 Temperature and Humidity ver-
sions of the Digital Room Sensor, you only need to wire the remote
sensor to the remote sensor terminal block on the digital sensor. DO
NOT CLIP OFF OR REMOVE the temperature/humidity sensor ele-
ment on the Digital Sensor. See Figure 23, page 16. When the remote
temperature sensor is wired in, it will override the on-board temperature
value of the OE217-03 or OE217-04 sensor, even though the sensor
element remains attached.
If using the WattMaster OE210 type Space Sensor as the remote sensor,
you must clip off the C1 capacitor from the back of the OE210. Be sure to
cycle power to begin reading the remote sensor. See Figure 21, page 15.