Enertech Bentone B2S Classic, Инструкция по установке и обслуживанию, Страница: 12 / 24

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05. MAINTENANCE
Cleaning the fan wheel
The outer fan housing half is kept firm by 5 screws.
Trimming
If the size of the nozzle is changed, it is suitable to first set the nozzle
assembly and air according to the recommendations in section Basic settings.
For the individual boiler installation, adjustments can then always be made
to optimise economy, operational reliability and environmental effects.
The most important instruments for the task are one instrument for flue-gas
analysis and a soot meter.
The principle of the adjustment is:
- reduce the air, either with the air regulation or the nozzle assembly, until
a soot coefficient 0.5–1 is achieved.
- increase the air to give a safety margin of 0,5-1% CO
2
before soot is created.
To throttle more with the shrouded disc (smaller reading on the nozzle
assembly scale), gives a short, more bluish flame and often better com-
bustion, but if one goes too far there will be starting problems. Throttling
less with the shrouded disc gives a longer and more yellowish flame and
can give a smoother start.
The pressure in front of the shrouded disc can be utilised as an aid in the
adjusment. Recommended pressure, see under Basic settings. Remember
to refit the rubber gasket on the pressure outlet after making the adjustments.
Automatic air damper
Remove the blast tube. Unscrew the 3 screws holding the cover on the
back of the burner. Check that the air damper is moving easily.