Parameters overview | 4
B1820023_en | Service handbook Lambdatronic H 3200 - T4e 77
Maximum flue gas temperature
Specifies the maximum flue gas temperature setpoint in
°C.
NOTICE!When using the TI wood chip boiler, the
upper range of the output decrease is calculated in
conjunction with the predefined flue gas control band.
100% boiler output from a flue gas temperature of
Upper point of the start ramp of boiler controller. If the flue
gas temperature reaches the value set here, the fuel
output should reach 100%.
Minimum difference between flue gas temperature
and boiler temperature in HEATING
As a condition for the “Heating” operating status, the
difference between the current flue gas temperature and
the current boiler temperature must at least exceed the
value set here.
Flue gas - Flue gas difference for start process
When the boiler controller changes to “Pre-heating” status
the current value of the flue gas temperature is stored.
When the flue gas temperature rises by the value set here
during “Pre-heating” or “Ignition” status, the boiler
controller switches to “Heating” status.
Safety time
If the condition “Minimum difference between flue gas and
boiler temperature in HEATING” is not fulfilled for the set
duration, the message “Safety time expired, flue gas
temperature too low for too long” appears on the display.
Flue gas temperature, below which boiler switches
to OFF status
If the flue gas temperature is below this value for the
duration of the “Safety time“, the boiler switches off.
Boiler flue gas difference for fire out
If the current boiler temperature plus the set value is
greater than the current flue gas temperature, the boiler
switches off.
Duration of pre-heating
Time during which only the ignition is activated. The fuel
slide-in is not active for this duration.
Infeed during ignition
Defined fuel feed-in for the “Ignition” status duration.
Maximum ignition duration
Specifies how long the ignition procedure should last. The
“Heating” status must be reached within this time.
Minimum output
Minimum value of boiler control variable which can be
used to operate the boiler.
Switch off ignition if the oxygen is reduced by
If an oxygen reduction of 50% of the set value is detected
in the “Pre-heating” operating status, the system
prematurely switches to the “Ignition” operating status.
Securely switch off the ignition when above
Flue gas temperature at which the ignition is deactivated
at the latest.
FGR
FGR flap position at partial load
At “Heating“ and “Empty stoker“ status, the FGR flap
regulates between the setting values of the “FGR flap
position at partial load“ and “FGR flap position at nominal
load“ depending on the flue gas temperature.
FGR flap position at nominal load
At “Heating“ and “Empty stoker“ status, the FGR flap
regulates between the setting values of the “FGR flap
position at partial load“ and “FGR flap position at nominal
load“ depending on the flue gas temperature.
Reduce underpressure at 100% FGR by
A certain value is deducted from the underpressure
setpoint depending on the FGR flap position.
Startup criteria for FGR - Flue gas temperature
The FGR flap is regulated from this flue gas temperature;
the flap closes below the set value.
ID fan control for FGR cleaning
Desired control of ID fan during boiler status “FGR
cleaning“.