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Occupancy Setting
There are three ways to define thermostat occupancy state.
NOTE:
Occupancy will be detected by
ESI contact by default.
•
Energy Savings Input (ESI) This is a dry contact input meant for communication from a
customer supplied occupancy sensor. (default)
•
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)
•
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 mode menu described below or
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 or hold to speed
up setting value change. 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
menu item selection. After another 10 seconds, the display will return back to User mode.
Settings are not changed unless confirmed using the MODE button.