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Point Name/Description
Hysteresis
– The desired difference between the temperature at which the zone color
changes as the zone temperature departs from the acceptable range between the
heating and cooling setpoints (green) into the Cooling 1 (yellow) or Heating 1 (light
blue) and the temperature at which the zone color changes back to the acceptable
range between the heating and cooling setpoints.
For example, the following graph shows the zone color that results as the zone
temperature departs from and returns to the acceptable range in a zone with the
following settings:
•
Color Change Hysteresis = .5° (applies as the temperature returns to the
acceptable range)
•
Occupied cooling setpoint = 76°
•
Occupied heating setpoint = 70°
Occupied cooling setpoint: 76°
75.5°
70.5°
Occupied heating setpoint: 70°
Learning Adaptive Optimal Start – This function gradually adjusts the unoccupied setpoints over a specified period of time to
achieve the occupied setpoint by the time scheduled occupancy begins. This learning adaptive algorithm uses the learned
heating capacity and learned cooling capacity values to calculate the effective setpoints prior to the occupied start time. The
algorithm calculates a learned cooling and heating capacity during the previous unoccupied time. Set the Learning Adaptive
Optimal Start recovery period from 1 to 4 hours in Optimal Start. When the Learning Adaptive Optimal Start routine runs,
adjustments are based on the color that is achieved when occupancy begins. Adjustment amounts are defined in the
thermographic color fields located directly above the Effective Set Points graph under Setpoints.
Effective Setpoints
The Effective Setpoints graph shows the current occupied or unoccupied setpoints. If occupied, these values are the current
programmed setpoints plus the offset of any setpoint adjustment that may be in affect. If unoccupied, the values are the
programmed unoccupied setpoints.
Heating – (Occupied or Unoccupied, depending on mode) The current programmed
Heating
setpoint adjusted by any offset that may be in effect.
Cooling – (Occupied or Unoccupied, depending on mode) The current programmed
Cooling
setpoint adjusted by any offset that may be in effect.
VVT Zone Controller
Temp
.5° hysteresis
.5° hysteresis
Time
Default/Range
D:
0.5°F
R:
0.2 to 1.0°F
R:
0 to 120°F
R:
0 to 120°F
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