ST-979 user’s manual
9
After successful fire-up, the controller switches to 100% modulation. When the CH boiler reaches
35⁰C (55⁰C-20⁰C=35⁰C), it switches to 60%modulation. When the CH boiler reaches 45⁰C
(55⁰C-10⁰C=45⁰C), it switches to 30% modulation.
If the controller cooperates with Lambda sensor, the user also needs to define the pre-set
proportion of oxygen in flue gas for each stage of modulation. Feeder and fan operation is
additionally modified according to Lambda sensor readings.
V.g) Manual mode
For the user's convenience, the regulator offers manual mode function. In this function, each
executive device may be activated and deactivated independently of others. It is an easy way of
checking if the following devices work properly: igniter, feeder, internal feeder, blow (fan), grate,
ash remover, CH pump, DHW pump, additional pumps, built-in valves or additional valves ( these
valves may be opened or closed in manual mode).
Additionally, the user may adjust the fan speed in manual operation mode using blow force
function.
V.h) Weekly control
The controller enables the user to control the CH boiler operation in a weekly cycle. It is possible
to program daily changes of the CH boiler temperature as well as DHW temperature. For this
function to work correctly, it is necessary to set current time and date. There are three types of
weekly control available:
V.h.1) CH boiler operation schedule
This type of weekly control enables the user to set the periods of CH boiler operation on particular
days of the week, with the accuracy of 30 minutes. During the periods of inactivity, the CH boiler
remains damped regardless of other factors (e.g. signal from the room regulator).
V.h.2) CH boiler weekly control
Weekly control function enables the user to program changes of the pre-set CH boiler
temperature for particular hours and days of the week.
In order to activate this function, select mode 1 or mode 2. Detailed settings of each mode are
available further in the submenu: Set mode 1 and Set mode 2.
Once a given mode is selected, the main screen displays the value of current temperature
deviation (below the pre-set CH temperature, alternately with Pre-set) informing the user that
the function is active.
How to adjust weekly control settings:
APC2 ADAPTIVE CONTROL controller enables the user to program weekly control function in two
modes:
MODE 1 – the user sets the temperature deviations for each day of the week separately;
MODE 2 – the user sets the temperature deviations for all working days (Monday-Friday) and for
the weekend (Saturday-Sunday) separately.
How to configure mode 1:
In order to configure mode 1, select Set mode 1 – the display shows the panel with particular
days of the week.
Once a given day of the week is selected, the screen shows the editing panel – the upper line
shows current deviation. Use and to change the time period. In order to edit the deviation
value, use and .
In order to copy the setting for the next time period,use . Once the temperature changes for a
given day are ready, tap on CONFIRM icon - the screen will display a screen allowing the user to
copy the settings for other days.
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