Rtc Configuration - Danfoss AK2-SC 255 Reference Manual

RTC
configuration
80
Num of cooling stages
Num of outside air coils
Consider dewpoint
OA Coil LAT low limit
Enable OA Coil #1 above
Target temp. for stage
Range +/-
Pre delay for stage
Post delay for stage
The Danfoss RTC control board can function as a stand-alone or as a node on the I/O
network of an SC 255 system. To begin configuration, select RTC as the type of unit
in the Configure HVAC menu. A menu for the unit is then presented by the system.
Selecting Fan from the unit brings up the first fan configuration page, shown on the
left below; the second page is shown at the right.
AK2-SC 255 Reference Manual
Average: Control will be based on the average of all
the temperature sensors in the unit's zone.
Zone Temp 1-1 (etc.): (each zone temperature
sensor will be available as a choice in the list) Control
will be based on the single selected temperature
sensor.
(0 to 6) The number of cooling stages in this HVAC
unit. Includes the number of outside air coils.
(0 to 2) The number of outside air coils in this HVAC
unit.
(List box: Yes, No) If Yes is chosen, the leaving air
temperature at the outside air coil needs to be less
than outside dewpoint for the coil to be active.
(20.0 to 60.0) The leaving air temperature at and
above which outside air coils are enabled.
(40.0 to 95.0) (Question is repeated for OA coil #2, if
present) The leaving air temperature at and above
which the named outside air coil 1is enabled.
(0.0 to 100.0) (One target per cooling stage excluding
outside air coil stages) The target temperature that
you want the first stage to maintain at the zone sensor.
(0.0 to 9.9) The range selected creates a dead band.
For example, if the target is 72 and the range is 2, the
stage will come on at 74, and will not be turned off
until the temperature reaches 70.
(0 to 60) (One setting per cooling stage.) The number
of minutes that must elapse after target plus range is
reached before the stage will come on.
(0 to 60) (One setting per cooling stage.)The number
of minutes that must elapse after target - range is
reached before the stage will be turned off. There is
one field for each stage.
RS.8D.M1.22