6 Measuring the boiler
6.4 Re-adjusting the air stages
Usually it is only necessary to adjust the blower stages when adjusting the output (e.g. boosting the partial load
stage, to avoid flue gas temperatures that are too low: In the “Basic Settings / Fan” menu). An effective chimney
height that is too low can also require a boost in power in the partial load range to achieve greater draught in this
case. Here usually the factory settings for medium load are transferred into the settings for partial load. However
they can also be used for fine adjustment of the CO
2
in the specific load stages and/or they can be used for fine
adjustment of the chimney draught.
The air stages can only be changed on the customer service level.
The factory settings are:
Easyfire
USP-10:
Fan P/M/N 9, 12, 18
Induced draught P/M/N 9, 12, 18
Easyfire
USP-15:
Fan P/M/N 12, 18, 31
Induced draught P/M/N 12, 18, 31
Easyfire
USP-20:
Fan P/M/N 16, 31, 42
Induced draught P/M/N 16, 31, 42
Easyfire
USP-25:
Fan P/M/N 24, 35, 43
Induced draught P/M/N 24, 35, 43
Easyfire
USP-30:
Fan P/M/N 27, 40, 47
Induced draught P/M/N 27, 40, 47
Explanation:
Fan: Fan stage of the combustion air fan (stages 6…50)
Induced draft: Fan stage of the induced draught fan (stages 9…50)
P/M/N: Partial load / medium load / nominal load
Rules for adjusting the air stages
Prior to changing the air stages the pellet factor must be correctly set in nominal load operation (see 6.3).
After each change you must check the CO
2
(after combustion stabilises).
If chimney draught is insufficient ( setpoint 0.1 to 0.2 bar = 10 to 20 Pa) it can be boosted via the speed level of the
induced draught fan. However the level should not be increased by more than 3. If in this process CO
2
content drops
excessively this can be compensated by lowering the level of the combustion air fan.
For CO
2
fine adjustment in partial load: The induced draught fan level should be equal to, or 3 levels lower (not
greater!) than the combustion air fan stage. Combustion air enters into the combustion chamber from below. If in
this process the quantity of combustion air is too low, then in partial load operation a lambent flame develops that
is no longer specifically directed in the direction of the post-combustion ring.
Cases where fan levels deviate by more than 3 from the factory settings are rare.
After concluding the adjustment process, save the settings, (see point 5.2) and set the user code “0” (operator level)
in the main menu item “Specialist level”.
MA-Easyfire 10.2008_EN.indd 67MA-Easyfire 10.2008_EN.indd 67 30.03.2009 13:30:10 Uhr30.03.2009 13:30:10 Uhr
To Next Page
Loading...
Need help?
General
