For VSF control, the output is configurable for any range between 0 V and 10 V. The parameters are
Start Voltage, Full Speed Voltage, and Minimum Command. Start Voltage is the voltage output at
which the fan begins running, and Full Speed Voltage is the voltage output at which the fan reaches
full speed. Minimum Command is the percentage of the range between the Start Voltage and the
Full Speed Voltage. The fan does not go below the minimum command when the fan is turned on.
By default, the Start Voltage is 2 V, the Full Speed Voltage is 10 V, and the Minimum Command is
20%.
When the variable speed fan is off, the FAN L binary output is off and the voltage at the VSF out-
put is 0 V. When the fan turns on, the FAN L binary output turns on and the voltage at the VSF out-
put begins controlling the fan. When the VSF is configured for reverse acting mode, when the Start
Voltage is above Full Speed Voltage, the VSF output is set to 10 V or the Start Voltage minus 1 V,
whichever value is the lesser, when the fan is turned off.
To configure the variable speed parameters:
1. Press the Menu icon.
2. Press Setup.
3. Press Equipment Setup.
4. Press Supply Fan.
5. Press Start Voltage and adjust accordingly.
6. Press Full Speed Voltage and adjust accordingly.
7. Press Minimum Command and adjust accordingly.
8. Press Save and the back arrow to return to the previous screen.
Setting the Control mode
About this task:
The Control Mode informs the controller to run in Cooling only, Heating only, or Automatic mode,
based on the temperature in the zone relative to the heating and cooling setpoints. Control Mode
does not override equipment lockouts or changeover. To set the Control Mode:
1. Press the Menu icon.
2. Press Setup.
3. Press General Control Setup.
4. Press Control Mode and select Cooling, Heating, or Auto as desired.
5. Press Save and the back arrow to return to the previous screen.
Setting the Fan mode - fan coil only
About this task:
The Fan Mode informs the controller how to handle the fan. The two options for fan configuration
are: a Fan Mode available to the installer through the menu system, and a fan override available as
an option to the end user from the Fan icon on the home screen. See Customizing the home screen
for information on enabling and disabling end-user controls. The Fan Mode available to the installer
is dependent on the fan type. The following options are provided for single- and variable-speed
fans:
• On—Fan is continuously on
• Auto—Fan cycles on demand with the controller entering cooling, heating, or dehumidification
modes
• Smart—Fan cycles on demand with the controller entering cooling or heating modes during
unoccupied periods but is continuously running during occupied and standby periods
29TEC3000 Series On/Off or Floating Fan Coil Thermostats Installation Guide
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