Operation and Maintenance Manual - GB
G
B
www.atmos.cz
GB-29
• After the ignition of pellets
the photocell will sense light
, which will cause the
ignition spiral to
switch off
with a slight delay.
• The burner will pass over to the
stage of perfect burning of fuel - set by parameter T7.
The OPERATION algorithm consists of the following steps:
• When the fuel burns perfectly, the burner will get to the
stage of gradual increase of the power
to the nominal value - parameter T10.
• After achieving the nominal power the burner works in the normal mode until the heating system
or the accumulation tank is heated to the required temperature.
The power of the burner results
from the hourly quantity of pellets
delivered by the worm conveyor to the combustion chamber.
The worm conveyor
works in the intermittent mode set by parameters T4 and T6
. Parameters
T4 and T6 are set in accordance with the instructions on page 32.
• After setting the nominal power of the burner you must also set the
amount of combustion air
ne-
cessary for complete burning of fuel. This setting is performed
with the air flap on the burner fan.
The exact setting should be carried out by a trained person with the use of a flue gas analyzer.
The burning out algorithm is designed as follows:
• After the
achievement of the set temperature
at the boiler thermostat (e.g. 85 °C) or temperature
in the accumulation tank - temperature at the bottom sensor (TS), the electronic control unit of the
burner will switch off the external
worm conveyor
. Thanks to this, the
pellets
in the combustion
chamber will
burn out
. Optimal burning out of pellets in the combustion chamber is additionally
supported by the operation of the burner fan for a certain time -
parameter T5
. After subsequent
drop of the temperature of water in the boiler or discharge of the accumulation tank - temperature
at the top sensor (TV), the burner will be re-started in the same way as described in the text above.
If the accumulation tank is connected to a solar exchanger and activating functions for automatic
optimization (switching) of sensors, parameter S15 = 3, the burner may be turned off by sensor TK
instead of sensor TS.
The other algorithms are designed in the following way:
• If the first attempt for ignition with fuel supply fails, the burner will repeat the whole algorithm.
After the second unsuccessful attempt for ignition with fuel supply the burner will proceed to the
third attempt during which the fuel is not supplied any longer, but only the ignition spiral is active.
After this unsuccessful attempt the burner will be put out of operation as the system has probably
run out of pellets or a fault has occurred.
• In case of a short-term interruption of power supply to the burner,
the burner will automatically
renew its operation
after performing diagnostic checks, complete burning out of pellets and a
new start.
INFO
- This sequence has been set intentionally to ensure safe and trouble-free operation
of the burner.
