KWB Easyfire, Руководство по установке и обслуживанию

Страница: 65 / 220

Page 66 IM Easyfire 10/2008 © KWB – Kraft und Wärme aus Biomasse GmbH
6 Measuring the boiler 6 Measuring the boiler
6.3 Adjusting combustion (CO
2
value)
Estimate the pellet factor (= fuel factor)
(Factory setting: 100 %). The pellet factor is used to adjust the boiler to the density and the energy content of the
pellets. Pellets of normal quality burn at a pellet factor of approximately 100 % with the right CO
2
value of 10 - 11.5 %.
Adjustment of the pellet factor is described in the operating manual, point 5.2.3.9 “Menu item – Fuel Factor”
Pellets with hard wood content or pellets that are pressed at high temperature (extremely
hard, extremely glassy surface), require more time for complete burnout. In this case a
lower pellet factor (e.g. 80 %) may be required.
Measuring mode is only permitted under supervision, because the system does not
switch off when the boiler temperature is reached. Ensure that there is adequate heat
dissipation.
Combustion can be roughly estimated based on the burner plate
at stable operation.
Allow boiler to run for approximately 10 minutes at nominal
load (Setting on “Measuring NL”, see point 6.1).
Check the draught ( setpoint 0.1 to 0.2 mbar = 10 to 20 Pa) and
adjust via the draught control shutter.
Check the flame aspect:
6 Combustion process on the burner plate
Combustion on the burner plate at stable operation should show a ring of ash, 1 - 3 cm in width on the outer edge
(see Fig. 73). There should be no unburned pellets on the edge of the burner plate, or in the ash box. The fuel bed
should be formed uniformly over the perimeter of the plate.
Measure CO
2
(setpoint: 10 % - 11.5 %):
Usually the CO
2
value fluctuates slightly. However fluctuation should not exceed 11.5 %.
If necessary adjust the fuel factor until CO
2
oscillates between 10 % and 11.5 %:
If there is excessive CO
2
content, decrease the fuel factor in 5 % increments or
If there is insufficient CO
2
content, increase the fuel factor in 5 % increments.
Only change the pellet factor in nominal load mode! Occasionally re-adjust the chimney
draught as needed. Wait approximately 5 minutes between readjustment of the draught
or fuel factor and taking new measurements; allow the CO
2
value to stabilise!
After concluding the measurements store the settings, (see point 5.2) and set the user code “0” (operator level) in
the main menu item “Specialist level”.
Ash
Combustion
Carbonisation
Feed
MA-Easyfire 10.2008_EN.indd 66 MA-Easyfire 10.2008_EN.indd 66 30.03.2009 13:30:10 Uhr 30.03.2009 13:30:10 Uhr