Advertisement
7
the latter must be checked out or sweeped. Overpressure in the boiler can also be created if the
burner has too high a feed rate or is getting too much combustion air. To try this out, you can
lower the fuel feed and air supply values. The burner is designed for max. 0 kW and can be
damaged (for example, by overheating) when getting too much fuel.
The draught in the boiler is crucial for your heating. If the burner is installed on a typical oil
burner, flue gas "brakes" and the like must be removed from inside the boiler so as to avoid
poor draught conditions likely to make the burner overheat and cause deflagrations when be-
ing started up. This problem can arise in summertime. The draught must be -.5 vp, measu-
red between boiler and chimney. The flue gas ducts in the boiler must be cleaned on a regular
basis. This is more important than the removal of ash. Also the burner's grate and gas neck
must be cleaned as needed, which is dependent on pellets quality: The higher the proportion
of fines in the pellets, the more frequently the burner must be cleaned.
Also the pellets storage bin must be cleared from fines. When the bin is emptied out to the
point where you can see the feed auger, check and make sure there are not too many fines in
the auger infeed. Too many fines obstruct feeding and can make the burner stop.
The burner is preset to about 5 kW. If you want to increase or decrease fuel feeding, procede
as described in the opening chapter. To ensure cost-efficient operation,flue gas temperature
must not exceed 75-300 degrees Celsius.
Clean the photocell now and then. Use paper – no chemicals! Soot deposits on the photocell
indicate that the draught in the boiler is insufficient or the fuel feed rate too high.
All solid-fuel heating plants need regular maintenance for best results and highest reliability.
So please be prepared to follow our instructions.
Advertisement
