Danfoss AK2-SC 255, Reference Manual, Page: 86 / 206

RS.8D.M1.22 AK2-SC 255 Reference Manual 85
RTC Heating
configuration
Num of heating stages (0 to 3) The number of stages of heat in the unit.
Control heating using (List box:)
Return Air: Heating will be controlled to satisfy a
return air target temperature.
Average: Heating will be controlled to satisfy an
average zone temperature target.
Low: Heating will be controlled to satisfy a zone
target temperature for the lowest of a number of zone
temperature sensors.
Zone 1(etc.): (each supply zone temperature sensor
will be available as a choice in the list) Control will be
based on the single selected sensor.
Target differential (0.1 to 100.0) The differential selected creates a
control dead band around the target temperature. For
example, if the target is 72 and the range is 2, the
stage will come on at 70, and will not be turned off
until the temperature reaches 72. The pre-delay and
post-delay must also be satisfied.
Target temp. for stage: (-50.0 to 99.9) A separate field for each of the stages
in the unit.
Pre delay for stage (0 to 15) The number of minutes that must elapse
after target plus range is reached before the stage will
come on. There is one field for each stage.
Post delay for stage (0 to 15) The number of minutes that must elapse
after target minus range is reached before the stage
will be turned off. There is one field for each stage.
Ambient temp lockout (List box: Yes, No) Whether or not heating is to be
locked out above a set ambient temperature (next line).
No heat above (0.0 to 100.0) The ambient temperature above which
heating will be locked out.
Night setback (List box: Yes, No) Whether or not the heating
setpoints are to be lowered by an offset (next line)