KEY RK-2006LP, Operating Manual, Page: 8 / 40

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tank is obtained during operation in MINIMUM POWER mode will result in switching
of the controller into POSTCOMBUSTION mode.
SCAVENGE (AIR PURGING).
During the operation with minimum power output, the controller will activate flue
scavenge (purging) to ensure removal of accumulated gases. Scavenge (purging) is
provided with temporary fan operation in higher speed.
POSTCOMBUSTION.
In the mode the auger is turned off by the regulator. The fan power is not altered (it
works with same speed as when the POSTCOMBUSTION mode was turned off).
The POSTCOMBUSTION prolongs till the moment the flame dies down, after which
the regulator is switched into the EXTINCTION mode.
EXTINCTION (SHUTDOWN).
In this mode the fan power is changed to the value programmed by the technical
staff to ensure complete fuel combustion and the burner cool down. When
EXTINCTION (SHUTDOWN) is finished the controller is switched into CLEANING,
STANDBY or STOP mode, provided POSTCOMBUSTION, EXTINCTION
(SHUTDOWN) followed as a result of STOP button pressing.
CLEANING.
The automatic furnace cleaning is carried out if the extinction time has been
determined by the technician or the burner has been operating long enough. In the
mode, the cleaning mechanism is activated for the period preprogrammed by the
technician. If the STOP button has been pressed during the cleaning, the controller
will enter either the STANDBY or STOP mode.
AUGER (MANUAL) REFILLING.
User may activate auger manual refilling function. When device is in STOP mode,
press START and hold button for 5 seconds to start refilling. Refilling follows
according to the time programmed by the technician or until it is manually turned off
with STOP button.
AUGER EXTINCTION (EMERGENCY SHUTDOWN).
If the auger is equipped with a temperature sensor, a temperature increase above
the range programmed by the technician, it will result in activation of auger ignition
alarm. The controller turns off the fan and auger. If the burner is equipped with the
stoker, the device is switched additionally into AUGER EXTINCTION (EMERGENCY
SHUTDOWN) mode. During shut down the stoker is engaged for the time needed to
remove the ignited fuel from the stoker. In addition if the burner has cleaning
mechanism, the controller will activate the cleaning cycle and remove fuel from the
burner.