Hoval BIC 960 - Access to the Automatic Firing Device; Reference Values in the Case of Bus Interruption; 3 Description of the Parameters

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DESCRIPTION OF THE PARAMETERS
2.8 Access to the automatic firing device
The boiler is operated in the same way as described in the operating instructions of the heating controller. The auto-
matic ring device operating in the background can be accessed using a special menu tree on the heating controller.
This menu allows access to the “BOILER CONTR” or “AUTO M/C” submenu, where it is possible to view an informa-
tion level and a parameter level.
‟INFORMATION”: As well as actual system values, which can be displayed via the Info-key, this option also al-
lows specic state variables to be viewed.
(for further information see “Display of Information from the Automatic Firing Device”)
‟PARAMETER”: Depending on the user level, which can be reached using various code levels, it is possible to
amend certain parameters. If using a Notebook (SITBIC960lab - Software), parameter settings
are also dependant on the code level. (for more information about controlling the automatic
ring device using a laptop, see ‟operating using a laptop”).
Attention: Afteraresetattheheatingcontrollertheparametersattheautomaticgasringdevicewill
 notberesettedtobasicsetting!
2.9 Reference values in the case of bus interruption
If there is an interruption in the bus connection between the heating controller and the automatic ring device, the
automatic ring device begins to operate in emergency mode, which means that a set value of 75°C (parameter 8) is
adopted. In addition, an error message is displayed on the heating controller.
3. Description of the parameters
The parameters can be set using the parameter tree of the heating controller, and also using the SITBIC960lab -
Software on a Notebook. On SITBIC960lab-software, the parameters are not indicated with a number, but with a
number and letter combination, which can be seen below in brackets.
Parameter 1 (2AA/32769): Blocking temperature
The value of the parameter determines at what boiler sensor temperature the burner is switched off.
(“B:08”)
Parameter 2 (2AC/32770): Maximum reference value
The reference value, which is set in manual operation, and/or which is calculated by the TopTronicT
®
/UG in auto-
matic operation, is here limited to a set value.
Parameter 3 (2AD/32771): Switch-off hysteresis above reference value
If during a heat demand, the temperature rises above the reference value plus the value entered here, the burner
switches off. See functional drawing 1.
Parameter 4 (2AE/32772): Switch-on difference relating to tripping point
When the temperature falls below the reference value + switch-off hysteresis (Parameter 3) – switch-on difference
(Parameter 4), the burner demand is activated. See functional drawing 1.
Temperature °C
Par. 3
Par. 4
Functional drawing 1