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DESCRIPTION OF FUNCTIONS
2.
Description of functions
2.1
General
The BIC 960 automatic firing device is designed for use in a modulating gas boiler. There for a PWM fan is triggered
by the automatic firing device. This fan has a supply voltage of 230V which is shut-off by an internal relay during
downtimes in order to reduce stand-by losses. Fan revolution speed modulation is controlled via an internal PID con-
troller in order to maintain the desired flow temperature. The flow reference value is not determined in the automatic
firing device, but is calculated and passed on via the heating controller.
The BIC 960 automatic firing device can be used in connection with the TopTronic
®
T/UG heating controller or
TopTronic® E basic module heat generator, why the BIC 960 is installed in the background, i.e. the circuit board is
not visible from the outside, and complete operation is controlled via the heating controller. The result is a unique
principle of operation at boiler level via one interface.
2.2
Water heater-Charging
Switch-over between hot water charging and heating demand is controlled by the heating controller.
2.3
Emission measuring and/or test function for gas valve setting
There is a specific key on the heating control unit allocated for emission measurements and/or gas valve adjustment.
By using the emission key, a mode of operation is initiated in which the automatic firing device operates in heating
mode, with an assigned reference value of 80°C, and in which power output can be adjusted manually using the
rotary button. After 20 minutes emission testing operation is ended automatically, and the boiler reverts to the prior
operation mode. It is important to ensure that the heat produced during emission testing can also be discharged.
When setting boiler performance in terms of percentage values, ensure that 1% is the set minimum performance and
100% is the set maximum performance. In between, there is a linear relationship, on which is it possible to set the
desired boiler performance.
2.4
Main switch
The main switch is located on the front of the heating control unit. It takes care for the power supply of the heating
control unit and of the automatic firing device, located in the background. When the switch is turned off, frost protec-
tion is not active.
2.5
Main gas valve (possibly LPG-valve) / heating room fan
An external main gas valve (possibly a fluid gas valve) and/or a heating room fan can be controlled by the automatic
firing device. The output is activated a set time (depending on the parameter settings) before activation of the burner
start. This application requires a suitable parameterisation of the automatic firing device. Ensure that the heat-
ing controller display shows the blocking B:04 (main gas valve) possibly LPG-valve)/ heating room fan) during the
burner start delay. Blocking is no longer shown beginning with BIC 960 V.3, but the waiting time has been retained.
2.6
External burner switch
Locking or activation of the automatic firing device takes place via the heating controller. The parameters must be
set to allow a suitable variable input, as described in the Customer-service technicians introduction to the heating
controller.
A further possibility is provided by blocking input X9-1/X9-4 via which the automatic firing unit can be set to blocked
status. In this case no error message is displayed at the heating controller.
