Fan Control Output; Short Cycle And Maximum Cycles Per Hour; Minimum Cooling Setpoint And Maximum Heating Setpoint; Assigned Current Temperature - Contemporary Controls BASstat Series User Manual

Fan Control Output

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Fan Output for Heating - the fan output for Heat mode is enabled "1" in [BV15] by
default. To let the RTU circuity control the fan during Heat mode – thermostat fan
control can be disabled by setting a "0" for Heat mode if desired [BV15].
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Lowest Fan Speed is the speed the fan will default to after a control action (Heating or
Cooling). If the lowest fan speed [MSV4] is set as "Stop (1)", the fan will be
automatically shut off after the control action (Heating or Cooling) and a 2-minute fan-
off time delay. During this delay time, the AUTO icon will flash, and the fan will shut off
after the 2-minute time delay expires. If lowest fan speed is set to "Low (2)" the fan will
run continuously after a control action.
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Fan Mode can be toggled between AUTO or CONTINUOUS by using the FAN button
on the thermostat (user) or BACnet object [MSV0] Fan Mode (BACnet supervisor). By
default, this value is set to "Auto(1)", the AUTO icon is displayed and the fan will be
controlled automatically. To put the fan in CONTINUOUS mode set to "Low(2)" this will
cause the fan to run continuously (no AUTO icon is displayed). Fan icon spinning
when fan is active. Optionally, the FAN button can be locked to limit user access to
this feature or the BACnet supervisor can be programmed to default the thermostat to
certain state at the end of an occupancy cycle.

Short Cycle and Maximum Cycles per Hour

There are short cycle and maximum cycles per hour protection for both cooling and heating
modes [AV23 – 26] Cooling Short Cycle Delay, Cooling Maximum Cycles per Hour and
Heating Short Cycle Delay, Heating Maximum Cycles per Hour.
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The Short Cycle Delay time (in minutes) will determine the minimum on time and
minimum off time of each stage before changing its state. The default setting is 3
minutes.
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Maximum Cycles per Hour will count the number of operating cycles in an hour. When
the cycle count reaches the maximum number of cycles within one hour, additional
cycles are prevented until the start of the next hour.
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When a stage change is pending due to a Short Cycle Delay or a Maximum Cycle
count, the Clock icon (
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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 limit [AV-39] default: 18℃/
65℉
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Maximum Heating Setpoint will be confined by set point high limit [AV-40] default:
25℃/ 77℉

Assigned Current Temperature

UM-15095500-AA0
) will appear on the LCD.
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