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4
SAFETY SYSTEMS
BS-01
To prevent the boiler overheating, the controller reduces the heat
output in certain situations. If the boiler still threatens to overheat,
the controller responds according to a set of defined safety levels.
Safety level 1
15°C above specified temperature
The drive motor Stops the fuel feed system and the flue draught
fan shuts down.
Safety level 2
Boiler temperature above 85°C
All heating pumps and the cylinder charging pump are switched
on to carry heat away from the boiler
Safety level 3
Boiler temperature above 100°C
The STL (safety temperature limiter) trips and switches all boiler
control functions off while the heating circulation pumps continue
to run. The system remains switched off even if the boiler
temperature drops back below 90°C. The system must not be
started up again until any faults have been rectified and the boiler
has been checked.
Power failure The controller, the flue draught fan and all circulation pumps
switch of due of electricity if there is a power cut. The glowing fuel
bed on the grate continues burn with the natural draught of the
flue. As this operating mode is not ideal, a larger amount of ash
collechts on the grate as well. As soon as the electricity supply is
restored, the controller takes control of the heating system again.
Opening the ash box
the auger motor Stopps feeding in fuel;
the suctionblower goes to 100 % extraction speed;
After the firebox door is closed, normal operation is resumed
or re- ignition initiated