Herz pelletfire 20/20, Operating Instructions Manual

Page: 16 / 100

7 Operating conditions
16
switches immediately into the CONTROL PHASE .
If a sufficient flue temperature is not achieved
after a specified time (below
FLUE GAS MIN
TEMP ), the boiler switches off by switching in the
HEATING OFF condition.
Re-heating
The RE-HEATING condition is used for safe
operation for re-heating. If the customer re-heats
a larger amount of logs in operation, then this
operation is activated. The boiler then remains in
this condition for the time set. If the boiler
temperature in the meantime increase above the
maximum boiler temperature, the boiler will be
switched off. After the set time is switched at
sufficient flue gas temperature in the state
CONTROL PHASE . If the flue gas temperature is
too low (below FLUE GAS MIN TEMP. ) it is
stopped and an error is displayed. This function
may only be activated by long pressing the
On/Off-switch in the STATUS MENU, if the unit is
in
HIGH RUNNING or CONTROL PHASE .
Chimney sweeper
The CHIMNEY SWEEPER MODE provides a test
mode for the chimney sweeper. The boiler is
operated steadily at nominal output and all
consumer values are set to its maximum during
the
chimney sweeper carries out its
measurements. The boiler runs high normally and
the chimney sweeper function is only activated
instead of the
CONTROL PHASE . This condition
is left when deactivation occurs or when the boiler
maximum temperature is exceeded or when the
maximum chimney sweeping time is exceeded
(45min).
LAMBDA CALIBRATION (code protected)
By activating the parameter LAMBDA
CALIBRATION in the parameter menu, the
calibration starts (only in condition UNIT OFF
activatable). The lambda probe is calibrated at the
factory.
Flue gas temperature control
The flue gas temperature control begins if the
HEAT UP FROM MIN(P06) is exceeded. The
target temperature modulates between the set
values
FLUE GAS NOMINAL LOAD and FLUE
GAS PART LOAD. In the high running phase as
well as when re-heating, it will be controlled at an
increased flue temperature (
FLUE NL + 15 ). The
15 °C are a setpoint specification. The actual
temperature deviance may be higher.
Lambda control
The primary and secondary air is controlled via
the lambda sensor. The control is able to detect
marginal deviations of the fuel quality and induces
a combustion improvement.
Control curve
Flue gas
– must
temperature
FLUEGAS NL
FLUEGAS TL
HEAT UP FROM MIN
65 °C BOILER MUST BOILER MAX
FLUEGAS NL +15 °C