Firing with hard coal and coke
*If you fire hard coal or coke, we recommend you to keep secondary air damper fully open. If your chimney is built
enough to ensure an adeqaute draught, you can keep secondary air damper 1/2 closed.
*Flue damper on the smokehood should be kept fully open or 2/3 open.
*When you have low fire or smaller fuel bed you can decrease the draught by closing the dampers further
Stand-by
*You can slow-down the combustion by
a. Decreasing the set temperature on the thermo-regulator
b. Closing the secodary air damper fully
c. Closing the flue damper fully
Your boiler does not switch the pump on and off automatically. That is why, you should keep the pump
switched on, when the boiler temperature is above the cold water temperature or there is fuel firing inside
the combustion chamber. Never switch the pump off unless the fire is completely put off.
Never let the boiler water temperature reach high values sharply with leaving the pump switched off. In this
case, the instant cold water delivey to the very hot boiler may result in cracks on boiler body due to high
thermal energy.
If the thermo-regulator does not operate properly, shift its setting step by step according to your comfort
conditions
Lack of chimney draugt
If there is lack on chimney draught or there is no draught at the chimney (such as badly built, uninsulated, blocked etc)
you may face combustion problems (no fire, excessive smoke, condensation due to cold flue gasses). In this case,
we strictly recommend you to have your chimney controlled by an expert, and fix any irregularity. Your boiler has been
17
e st ct y eco
e d you to a e you c
ey co t o ed by a e pe t, a d
a y
egu a ty
ou bo e
as bee
designed for natural draught principle, and that is why, chimney installation is vey important.
Fuel
Fuels must comply with the specifications given in the technical data section. The manufacturer will not be held
responsible for the problems due to lack of fuel specifications, use of fuels not suggested for this boiler.
Summary of Contents for DUNATECH 2012
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