Operating Conditions; Boiler Operation With Log Wood - Herz firestar de Luxe 18 Operating Instructions Manual

7

OPERATING CONDITIONS

7.1

Boiler operation with log wood

HEATING OFF
During this phase the boiler is switched off, i.e. the
burner is blocked.
Scorch phase
In the BURNING PHASE condition wait to see if
the logs catch fire in the combustion chamber.
During 30 minutes an adequate flue temperature
(HEATING UP FROM MIN)) is adjusted so that it
can be switched on into the HIGH RUNNING
PHASE condition. If this flue gas temperature is
not set, it switches into the HEATING OFF
condition and a corresponding fault is declared.
In this condition it is possible to switch manually
into the UNIT OFF condition.
Start up phase
In the RUN UP PHASE condition, after lightings
the logs, it tries to stabilise the combustion and
achieve the minimum boiler temperature. The
optional combustion control (lambda control) is
already activated at this time. When reaching 65
°C the boiler temperature (set out in the program)
it is switched to the control phase. If the flue gas
temperature decreases in this phase (below FLUE
GAS MIN TEMP.), it switches into the RESTART.
Control phase
The CONTROL PHASE condition carries out
actual boiler control, which splits into an output
and combustion control (OPTIONAL).If the boiler
temperature increases in this phase above the
maximum boiler temperature (BOILER MAX), it
switches into the READY condition. If the flue gas
temperature decreases in this phase below the
allowed (FLUE GAS MIN TEMP.) it switches into
the RESTART condition.
Ready
The maximal boiler temperature (BOILER MAX
(P02)) has been reached due to too low heat
capturing. Therefore the boiler has been switched
off. The boiler starts up again if the boiler
temperature falls 3°C below BOILER MAX).
Restart
The NEW START-UP condition tries to re-
stabilise the combustion within a time limit
(adjustable via MAXIMUM RE-START).It will
always be activated if the flue gas temperature is
too low. If there is a stable combustion again, it
switches immediately into the CONTROL PHASE.
If a sufficient flue temperature is not achieved
Operating conditions
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
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
CALIBRATION in the parameter menu the
calibration starts (only in condition UNIT OFF
activatable). The lambda sensor is calibrated at
the factory.
Flue gas temperature control
The flue gas temperature control begins if the
HEAT UP FROM MIN is exceeded. The target
temperature modulates between the set values
FLUE GAS NOMINAL LOAD and FLUE GAS
PART LOAD (P05). In the run up phase as well
as when re-heating, it will be controlled to an
increased flue gas temperature (FLUE GAS
NOMINAL LOAD + 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
7
carries out its
parameter LAMBDA
13