Operating manual for the auroMATIC 620 Controller 0020094404_008
3.2.1 Use as a solar differential temperature
controller
The controller can also be integrated in existing systems
as a solar differential temperature controller. In such a
case, the controller functions only as the control system
for the solar system. The heating installation is control-
led by the existing heating controller.
3.3 Overview of functions
The controller provides the following options for con-
trolling your heating installation and hot water genera-
tion:
Energy saving function
Allows the target room temperature to be reduced for a
set period
Frost protection function
Protection from frost damage in the Off and Eco modes
(outside the time windows);
The boiler must remain switched on
Heating curve
The basis of weather compensation; improves the mat-
ching of the heating output to the outside temperatures
Holiday programme
Individual control of the room temperature during your
absence;
only in the Auto and Eco operating modes
If the holiday programme is activated, the cylinder
charging is deactivated, the control system for the solar
circuit is unaffected by the holiday programme.
Off
Heating installation switched off or hot water genera-
tion with active frost protection
One-time Cylinder Charging
Charges the domestic hot water cylinder independently
of the current timer program on one occasion until the
set target temperature is reached.
Override
Allows you to continue the heating and hot water times
beyond the next switch-off time up to the next heating
start.
Setting the solar gain to zero
Allows you to set the value of the cylinder gain to zero
Time window
Individually settable time settings for the heating instal-
lation, the hot water generation and the operation of a
circulation pump
Weather compensation
Automatic changing of the heating water temperature
(flow temperature) depending on the outside tempera-
ture by means of a heating curve
3 Description of the appliance
