then another layer of kindling and larger amount of dry wood. After ignition close the top door and
open the lower door. For faster flaring up the extraction fan may be switched on (DC7OS, DC15E).
When the fuel has caught sufficient fire, close the lower door, fill the storage tank completely with
fuel and close the ignition valve with its pulling rod /17/. Set the waste gas thermostat into the oper-
ating position which it is necessary to determine for ideal operation. On the FR 124 draught (output)
regulator /22/ set the required outgoing water temperature 80 - 90 °C (note – DC50SE is not equipped
with draught regulator FR 124). If the boiler should work as a gasification appliance, then a layer of
glowing charcoal must be kept (known as reduction zone) above the gasifying nozzle. This can be
achieved by burning dry firewood of suitable size. When burning moist wood, the burner does not
operate as a gasification appliance, the fuel consumption increases dramatically, the boiler does not
reach the required output and the service life of both - the boiler and the chimney - decreases. If the
specified chimney draught is adhered to, the boiler operates up to 70% output without the ventilator.
Waste gas thermnostat setting
NOTE – when burning wood for the first time, condensation occurs and condensed fluid
leakage occurs – this is not a defect. Condensation will disappear later. When burning small
wood waste particles, it is necessary to monitor the waste gas temperature which must not
exceed 320 °C. Otherwise, the ventilator (S) may sustain damage. Wood-tar and conden-
sate formation in the hopper is a side effect of wood gasification.
ATTENTION
– during operation, all doors must be shut and the ignition valve pulling rod
must be inserted, otherwise the ventilator (S) may sustain damage.
Output regulation - electromechanical
Output regulation is achieved by means of a control flap valve /8/ operated by the FR 124 draught
regulator /22/ which automatically opens up or shuts down the valve /8/; depending on the pre-set out
-
going water temperature (80 - 90 °C) (DC50SE excluded). The output (draught) regulator adjustment
should be done carefully because it not only regulates the output; but also protects the boiler against
overheating. The setting should be in compliance with the enclosed ‚Assembly and Setting Instructions‘
Firing-up
Operation
Ignitation valve operating
Open
Close
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