Operation; User Mode - Contemporary Controls BASstat BAST-121C-B2 User Manual

4 Operation

4.1. User Mode

User-side control is accomplished with six buttons – MODE (Heat/Cool, or Ventilate), FAN (Auto or
On), UP, DOWN, SET, and POWER. There are also options to lock the panel buttons to limit user
access if so required. A large LCD display indicates setpoint, space temperature, occupancy status,
and current mode of operation using graphical icons.
System modes (Cool only, Heat only, Ventilate) available to the installer are dependent on control
type chosen from BACnet object [MSV1] Control Type. or by toggling the MODE button within one
minute after setting an option command (OPTS) in the Engineering Menu. See section 4.2 Control
Type of this manual). Once the operating mode (Heat only or Cool only) is set by the installer, the
BASstat will stay in that mode exclusively until a two-step control changeover sequence is initiated.
NOTE: a factory reset (rst) will not change the operating mode.
System modes and button operation may be limited by the installer, especially if the thermostat is
completely controlled over BACnet network.
The first tier of operation includes the following settings as shown below. To operate the thermostat:
1. The POWER button
thermostat outputs. Turning the unit off with this button will disable the control outputs.
(ON/OFF control can be accomplished over BACnet as well).
2. At power ON, press any button to start the User Mode operation. Press the MODE button
to toggle between heat/cool mode or ventilation only mode.
Press the UP/ DOWN buttons
setpoint or rotate the values of a setting. Press the FAN button
modes of AUTO or CONTINUOUS. If no AUTO icon is displayed, the fan is in
CONTINUOUS mode and it will run continuously until commanded off using the FAN button
on thermostat or BACnet command. If the AUTO icon is flashing, the fan is operating under
delay timer and will shut off automatically when delay timer expires.
Press the SET button
the unit between Occupied or Unoccupied states when outside of scheduled operation.
Use SET or MODE to apply (SET button can be locked in applications forbidding
occupancy state user control).
3. The thermostat will exit the Engineering Menu and return to its normal operating display 10
seconds after the last panel button press.
UM-15095000-AA0
toggles between ON or OFF states to start / stop the
to increase/decrease temperature
and use UP/ DOWN buttons
to toggle fan
to toggle
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