BTA User Guide
Topling Prnjavor
Page 54
feeder is higher than the set TEMP. AT WHICH SCREW FEEDER SHUTS DOWN, solenoid
valve, which releases water into the screw feeder, starts to open and close periodically. In this
situation, the boiler stops with the operation and alarm turn on. Engine of the puller and primary
air fan stop to operate, while motor of the rotor sensor and screw feeder operates constantly and
turn s back the fire in the burner. Negative pressure is kept at set value. The notification about the
alarm is shown on the display. The time during which solenoid valve is closed or open are set
below the words OPERATION (RAD) and PAUSE (PAUZA) (ss.hh. format). If released water
manages to extinguish the fire in the screw feeder and the temperature of the crew feeder drops,
solenoid valve closes. However, if this is not enough and the temperature of the screw feeder
continues to be higher, solenoid valve opens and continually releases the water in the screw
feeder until the fire is extinguished.
There is thermo valve which opens and releases water not screw feeder at the temperature of 80
°C. In the lower left corner, the information about the solenoid valve (open7closed) is shown.
PHOTOCELLS
The photocell is located in a hole in the back of the burner. Photocell serves as a flame detector
in the burner and sends the information to the controller if there is a flame in the burner. On the
side of the photocells there is a fan for cooling in order to prevent burning of the photocell. There
are three displays under the option (PHOTOCE
LL) FOTOĆELIJA in main menu.
On the first display in the right top corner, there is an indication of the state of photocell. If the
flame is currently registered in the burner, light bulb is shown, and if the flame is not registered
the symbol of the moon is shown.
Variable LIGHT (SVJETLO) and DARK (TAMA) are used to eliminate the rapid changes of the
photocells. ALLOWED TIME of THE DARK (DOZVOLJENO VRIJEME MRAKA) is the maximum
time that can pass that photocell does not register the flame in the burner, during boiler operation.
This value is specified in mm.ss format if the photocell is in dark during this time, the boiler stops
normal operation and begins the process of'' firing''
Parameters important for the process of firing are set on display PHOTOCELL
(FOTOĆELIJA)(2/3). One attempt of firing: wait that certain amount of pellet defined with
Summary of Contents for BTA1000
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