1101
1 3
Illustrations may differ from actual product
Subject to printing/proofreading errors
Boiler temperature control via the burner
Boiler temperature control via the burner can be used in all operating modes.
The boiler temperature sensor must be connected to the burner.
The burner's temperature control controls
the boiler tempera-
ture with a connection difference of 10 °C.
The tem-
perature is set on the circuit board. See
22.
When it is idle, the burner senses
a rapid decrease in temper-
a-
ture, which may occur in an 'exchanger
boiler' when hot water is drawn off. The
burner then starts before the temperature has
fallen to the normal start value. The temperature
control is also suitable when the burner has been
installed in a wood-fired boiler with accumulator tanks.
The burner is connected electrically in accordance with 'Boiler
temperature control via the burner'.
If the burner is preceded by a boiler thermostat, this must be set to its maxi-
mum value. The setting on the burner must be 10-15 °C lower.
Start delay
The setting 26 allows the start to be delayed by 0-135 minutes. This function
extends the burner's operating time, which increases its efficiency. This
function can be used with all operating modes but is not suit-
able for boilers with hot water heating via a heat exchanger.
Adjustment
TEMP
START DOSE
22
26
The burner's factory settings allow it to start in most boil-
ers. These are not operating settings. They must be adapted
in each case. Optimum adjustment is possible only using
flue gas analysis instruments.
Correct adjustment is important for good heating economy,
high efficiency, low emissions of environmentally hazardous
substances and the service life of the parts of the burner in
contact with the flame.
On account of irregular supply from the feed auger in the first few days,
the burner should be adjusted after roughly one week of operation.
1. Check that settings 23, 24, 25, 26 and 27 are as shown in the figure.
24
25
26
27
23
Thermostat
Thermal relay
Alarm
Feed auger
Earth
Earth
Earth
Control signal
Ta
chometer
generator
TEMP
START DOSE
2.
Feed auger supply;
single-revolution supply produces more regular,
more reliable pellet supply if the friction between the pellets and the
feed auger/pipe is high.
24
Supply 1/1 rev.
Supply 1/3 rev.
Let the burner burn for around 5 minutes.
The fuel setting may not be changed.
a. Take a soot sample. The soot number should
be 1-3.
b. Perform a CO
2
measurement.
Adjust with 'Air, LOW Power'.
If the CO
2
value is:
- too low: reduce 'Air, LOW Power'.
- too high: increase 'Air, LOW Power'.
Repeat this test several times.
27
Air, low power
blue
3.
High powe
r; start the burner and let it burn for
around 10 minutes.
a. Take a soot sample. The soot number should be
1-3.
b. Perform a CO
2
measurement.
Adjust with 'Fuel'.
If the CO
2
value is:
- too low:
increase 'Fuel'.
- too high: reduce 'Fuel'.
Repeat this test several times.
25
Fuel
green
4.
Low power;
with the burner in operation, set the switches as shown in
the figure:
24
Low power
On (SW1/1)
Off (SW1/2)
5. Operating modes.
High power, 20 kW
24
High power
Off (SW1/1)
On (SW1/2)
Modulating, two power modes, 15/20 kW
The burner switches from low to high power when it has been in low power
operation for 20 minutes.
Modulating,
Off (SW1/1)
switch from low to high power
Off (SW1/2)
24
Low power, 15 kW
Low power
On (SW1/1)
Off (SW1/2)
24
The adjustment is now complete.