Operation and Maintenance Manual - GB
G
B
www.atmos.cz
GB-33
Setting the required power and combustion quality:
The required power is set with the use of parameters T4 and T6.
However, the actual power is also influenced by the diameter of pellets and angle of the conveyor.
Therefore, you should keep in mind that if after setting the burner you change the angle of the conve-
yor or diameter of pellets, you will have to readjust the burner.
Adjust the combustion quality with the air flap of the fan
in such a way that the
flame tips should
always end 1 to 3 cm before the opposite wall. For boilers with burner built in the upper door
and the combustion length of 60 cm or greater, adjust the burner in such a way that the tip of
flame ends 10 to 15 cm before the opposite wall.
You should also know that the setting of the burner is different if the boiler is equipped with an extrac-
tion fan and if the boiler does not have an extraction fan.
The combustion should be precisely tuned
after 30 to 60 minutes of permanent operation, best with the use of a flue gas analyst.
We recom-
mend you to adjust the burner in such a way that the
surplus of O
2
in the flue gas can be in the range
of 8 to 10 (12) % and the average CO content can be lower than 500 mg/m
3
. During operation the
flue gas temperature must never drop below 130 °C and rise over 250 °C (parameter S18).
INFO -
As the burner is equipped with many functions (parameters), you should only set
the basic parameters that characterized the
burner power - T4 and T6, the air flap.
Recommended approximate setting of the burner with the use of DRA50 conveyors, for indivi-
dual output values and pellets with the diameter of 6 mm and conveyor angle of 45°:
Recommended approximate setting of the burner with the use of DA50 conveyors, for indivi-
dual output values and pellets with the diameter of 6 mm and conveyor angle of 45°:
INFO
– If necessary, if there is a limited space in the boiler room, you can shorten the
length of the conveyor (worm) or its leg any time as desired, but the angle of the conveyor
should never exceed 45°.
• Parameter S1
–
Allowed number of attempts for ignition with fuel supply….
(2).
If parameter
S1 is set to 4, the fuel
will always be ignited
with both the ignition elements at
the same time (Z1 + Z2) in 2 attempts for
ignition with fuel supply.
CAUTION -
Always after the last attempt for ignition with fuel supply given by parameter
S1, an attempt for ignition without fuel supply will follow to test the equipment. If the fuel
is not ignited after this attempt, the system will be put out of operation and the
ALARM
START
error message will appear.
Boiler
output
Parameter
T1
Parameter
T4
Parameter
T6
Parameter
S3
Opening of the air flap on the
burner fan of a boiler with an
exhaust fan
40 – 45 kW
60s
4,5 s
14 s
70%
40 mm
30 – 35 kW
60s
3,4 s
16 s
45%
50 mm
Boiler
output
Parameter
T1
Parameter
T4
Parameter
T6
Parameter
S3
Opening of the air flap on the
burner fan of a boiler with an
exhaust fan
40 – 45 kW
80s
11 s
8 s
70%
40 mm
30 – 35 kW
80s
8 s
9 s
45%
50 mm