Minimum Cooling Setpoint And Maximum Heating Setpoint; Assigned Current Temperature; Occupancy Setting - Contemporary Controls BASstat BAST-121C-B2 User Manual

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To disable short cycle checking, set the short cycle to 0 minutes. NOTE: Do not use
this value unless the heating and cooling equipment is equipped with an internal
timer. Damage to equipment may occur.

Minimum Cooling Setpoint and Maximum Heating Setpoint

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Minimum Cooling Setpoint will be confined by set point low [AV-39] default: 18℃/
65℉
•
Maximum Heating Setpoint will be confined by set point high limit [AV-40] default:
25℃/ 77℉

Assigned Current Temperature

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A current temperature value can be assigned through BACnet AV-1 to take place of
the onboard temperature sensor value. The assigned value is valid if BACnet
communication is driving a flip-flop signal to (BV-16: heartbeat signal) within the (AV-
29: Heartbeat Rate time) period (in seconds). Otherwise, the assigned temperature
will revert back to the onboard sensor reading.

Occupancy Setting

There are three ways to define thermostat occupancy state. NOTE: Occupancy will be
detected by ESI contact by default.
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Energy Savings Input (ESI) This is a dry contact input meant for communication from
a customer supplied occupancy sensor. (default)
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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)
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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 the SET button to confirm. The SET button can
work in conjunction with BACnet occupancy Command [BV14] on a 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.
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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).
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When in unoccupied state, a Moon (
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 (
indicate occupied state on LCD.
UM-15095000-AA0
) icon will be displayed on the LCD and the
) will be displayed to
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