iWorx® HPU3
505-035, Effective: June 30, 2015
15
© 2015 Taco Electronic Solutions, Inc.
Figure 5: Space Setpoint Calculation.
The effective setpoint is a calculated value based on the space setpoint and the thermostat setpoint offset value. The
setpoint offset is used to increase or decrease the space setpoint from the local thermostat. The offset value is limited
to plus or minus the programmed setpoint adjustment.
The setpoint offset also affects the calculated heating and calculated cooling setpoints by an equal amount. The set-
point offset only applies in the occupied mode of operation; it has no affect in the unoccupied mode. Note that the
actual programmed heating and cooling setpoints are not changed. The offset is added to the programmed setpoints to
derive the calculated values.
Occupied Mode
Unoccupied Mode
CalcCoolingSp
OccupiedCoolingSp SpOffset
=
CalcHeatingSp
OccupiedHeatingSp SpOffset
=
EffectiveSp
SpaceSp SpOffset
=
CalcCoolingSp
UnoccupiedCoolingSp SpOffset
=
CalcHeatingSp
UnoccupiedHeatingSp SpOffset
=
EffectiveSp
SpaceSp
=
