5
To set the primary air damper (
A
), remove the secondary air damper (
B
) by loosening the screws (
1
).
Loosen the primary air wheel screw (
2
) and rotate the primary damper to the required position. Retighten the
screw and replace the secondary damper.
To set the secondary air damper (
B
), turn the adjustment screw (
3
) either clockwise (
+
) or anti-clockwise (
–
)
using the Allen key provided. The air setting will be indicated in the display window.
COMBUSTION AIR
AIR DAMPER ADJUSTMENT
To conform to Efficiency Directive
92/42/EEC, the concentrations of
CO and CO
2
in the flue gases must
be verified. As combustion air can
be taken from the room in which the
boiler is situated or from outside,
there may be variations in the ratio
depending on the combustion air
temperature.
Use
the
graph
adjacent to set the correct level.
Example: a 29
–36 kW boiler taking
in combustion air at 20°C will
require a CO
2
ratio of 12%
Fig 2
Fig 3
Summary of Contents for RDB2
Page 11: ...11 Fig 11 Burner Fault finding Logic Chart ...
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