Boiler with compressive ventilator DC70S
Basic setting of primary air ratio:
Optimum setting:
fully closed (5 mm) + 8÷10 mm
Maximum setting:
fully closed (5 mm) + 10÷20 mm
Basic setting of secondary air ratio:
Optimum setting:
fully closed (8 mm) + 0 mm
Maximum setting:
fully closed (8 mm) + 5÷20 mm
Adjustments to settings should be done on the basis of the waste gas analyzer and maximum
temperature; which must not exceed 320 °C at the outlet to chimney, at stabilised nominal
output /with closed ignition valve/. The boiler is set to optimal operating parameters by the
manufacturer. Therefore, make adjustments to settings only in cases where the operation
conditions are non-standard (for example - if insufficient chimney draught, pull the regula-
tor pulling rod to its maximum).
29. Fuel refill
Before fuelling, open the ignition valve /13/ with the pulling rod /17/. Do not switch the extraction
ventilator off. Wait for approximately 10 seconds and slowly open the loading door /2/ so that any ac-
cumulated gases are first vented off into the flue-gas duct and not in the boiler room. Before opening
the DC70 door, switch the pressure ventilator /4/ off using switch /20/. Cover the glowing charcoals
with a wide log. Do not press the fuel on the gasifying nozzle, it can put the flame out. Always fill the
hopper completely. In order to prevent excessive smoke formation, load new batch of fuel only after
the previous fuel has combusted to at least one third of the loading volume.
CAUTION – during operation, the ignition valve pulling rod must be retracted, other-
wise damage to the ventilator (S) will occur. Otherwise, the ventilator (S) will sustain
damage.
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