Seltron AHC40 - Factory Settings; Description of the Mixing Cycle Operation

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Tools for help in the controller setup can be found in the menu. The following features are
available:
RESET OF CONTROLLER PARAMETERS
All parameter settings (except S1.1) are restored to factory values.
RESET OF THE CONTROLLER AND RESTART OF THE FIRST SETUP
Setup will restore all parameters to factory values. The controller goes into the state of the initial
start-up.
RESET OF TIME PROGRAMS
The setup will restore factory-set time programs.
SAVE USER SETTINGS
Save all controller settings as a backup.
LOAD USER SETTINGS
Load all controller settings from the backup. If the backup does not exist, the command shall not
be executed.
Prior to the implementation of each of the above-mentioned features, the con-
troller requests the conrmation of the selected feature.
FACTORY SETTINGS
DESCRIPTION OF THE MIXING CYCLE OPERATION
Calculation of the stand-pipe temperature for heating
The calculation of the stand-pipe temperature for heating is limited with the maximum
temperature of the stand-pipe – S2.6 parameter and with the minimum temperature of the
stand-pipe – S2.5 parameter. The inuence of the room temperature on the stand-pipe
calculation can be set up with the S2.1 parameter. The heating curve steepness can be set
up with the P2.1 parameter and parallel shift of the heating curve with the P2.2 parameter.
Calculation of stand-pipe temperature for cooling
The calculation of stand-pipe temperature for heating is limited with the minimum tempera-
ture of the stand-pipe – S2.11 parameter. The inuence of the room temperature on the
stand-pipe calculation can be set up with the S2.17 parameter. The cooling curve steep-
ness can be set up with the P2.6 parameter and parallel shift of the cooling curve with the
P2.7 parameter.
Heating operation
If the calculated temperature of the stand-pipe is not slightly higher than the room tempera-
ture, the mixing valve closes. If the room temperature is not measured, the mixing valve
closes when the outdoor temperature approaches the preferred room temperature. With
the S2.12 parameter, the required di󰀨erence between the calculated temperature of the