Product Overview

FlexStat (General) 20 Application Guide, Rev S
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Adding a Remote Temperature Sensor to an Input
For space temperature, the FlexStat uses an internal sensor tied to Ana-
log Input #1. However, a thermistor can also be connected to one of the
extra inputs (2 though 4 and 7 through 9) as a remote room temperature
sensor. (Not all applications may have extra inputs available—see the
Sample Application sections.)
In the BAC-12xxxx/13xxxx/14xxxx FlexStats with six external inputs, the
Input 7 sensor (AI7) can be congured for a remote space temperature
sensor through the menus. Then space temperature can be congured
for onboard (internal AI1), remote (AI7), averaging of the two, the low-
est reading, or the highest reading.
Sample Custom Applications
In BAC-1xxxx FlexStats with only three external inputs, to have the re-
mote sensor’s value shown on the FlexStat display instead of the internal
sensor’s, do the following in BACstage or TotalControl:
1. Congure the original space temperature AI1 object to “Out Of
Service.”
2. Congure the input for the added room temperature sensor input.
(Type III is the default thermistor type for AI2–AI4 and AI7–AI9.)
3. Add the following Control Basic program. (In this example, the ap-
plication has input #2 open—use another input instead as needed.)
AI1 = AI2
4. Restart the FlexStat.
APPLICATION
DEGREES SCALE: °F
APP: FAN COIL
OPT: 4-PIPE
ADDITIONAL SETUP
ADDITIONAL SETUP
DAMPER
FAN
HUMIDITY
MOTION SENSOR
OPTIMUM START
SENSORS
STAGING
SENSOR SETUP
IN 2: NOT USED
IN 9: NOT USED
SPACE TEMP:
-- IN 1 IS ONBOARD
-- IN 7 IS REMOTE
REMOTE
To use a temperature sensor connected to another controller, see Using
Another Controller’s Sensors on page 21 and use additional code
to map the remote sensor’s present value to AI2 (or other appropriate
input).
It may take a minute before the remote temperature starts displaying
correctly. To calibrate the sensor, see Calibrating a (Temperature) Sensor
on page 8 and use the appropriate input.
NOTE: The Home screen can display temperatures from –99 to 999
(with rmware version R1.3.0.8 or later). Temperatures be-
tween –9.9 and 99.9 degrees can be (if enabled in the User Inter-
face menu) displayed with tenths of a degree.