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CONTEMPORARY CONTROLS BAST-421C-B2 BACnet Communicating Thermostat User Manual
Occupancy Setting
There are several ways to define thermostat occupancy state. Note: Occupancy will be
detected by ESI contact by default.
1. Energy Savings Input (ESI) This is a dry contact input meant for communication
from a customer supplied occupancy sensor. (default)
2. Occupancy status (occupied/unoccupied) can be set by a BACnet supervisor using
writable object ESI Contact Definition [BV14]. “0” for occupied, and “1” for
unoccupied. E12/AV18 must be set with a value of 64 (disabled) in advance
(E12/AV18 is set as 0 by default)
3. User control of occupancy state is allowed from the SET button if E12/ AV18 Lock
has the ESI Contact disabled. Pressing the SET button and UP/DOWN buttons will
toggle the occupancy state. Press SET button to confirm. The SET button can work
in conjunction with BACnet occupancy Command [BV14] on last-write-wins basis.
The SET button could be locked to limit user control (use Lock [AV18] BACnet
object or (LOC) engineering menu item to lock SET button). In this case only the
BACnet supervisor can set occupancy states.
•
•
Occupancy Status [BI0] is a read-only BACnet object indicating current
occupancy state -“0” for occupied, and “1” for unoccupied. (AV18 is set as 0 by
default).
When in unoccupied state, a Moon (
) icon will be displayed on the LCD and
the thermostat will change the set-point temperatures to the Unoccupied Cool
and Unoccupied Heat setpoints [AV8 – 9]. When the state changes back to
occupied, the thermostat will return to the occupied set-point values for Cooling
and Heating Temperature Setpoint [AV0, AV3] and a sunlight icon (
) will be
displayed to indicate occupied state on LCD.
4.3 Engineering Mode Menu
Thermostat configuration can be performed using the engineering menu or by
controlling BACnet objects using a BACnet client tool such as Contemporary Controls
free BACnet Discovery Tool (BDT). It is highly suggested that engineering mode be
operated by trained installers only because it is related to system parameters that will
affect the control results.
Operation of Engineering Menu
•
At power “ON,” press and hold both the UP and DOWN buttons
simultaneously for 5 seconds to enter Engineering Mode menu.
•
Press the UP or DOWN buttons to rotate through the menu items. The last
item loops back to first item at the end of items in menu. Press the MODE
button to enter a submenu item.
•
Press the UP or DOWN button to change the setting in the submenu item.
Press the MODE button to confirm the setting and return to menu item
selection. If no button is pressed for 10 seconds, the display will return to the
UM-15093000-AA2
Page 16
| General | Details |
|---|---|
| Name | CONTEMPORARY CONTROLS BAST-421C-B2 BACnet Communicating Thermostat User Manual |
| Make | CONTEMPORARY CONTROLS |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.65 MB |
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