• Feedfan,smoothregulaon(0%to100%).
• Telescopic pull-out system of burner
Pellforeasymaintenance
2.3. Safety devices of pellet boiler-and-
burner
A complex of safety devices provide for
thesafetyof theappliance.Air-feedfan,
step–regulated,controlsthecombuson
according to energy needs and is
maintained in opmal working order.
IndependentSTBthermostatshut-othe
burner and shut o the fuel feeding in
thecombusonchamberincaseofrising
boilertemperature.
• Elbow-shape feeder chute. The
geometrical shape of burner feeder
chute prevents backre entry from
burner into pellet hopper. The exible
tubeismeltedatatemperatureabove
80°C.Thuspreventaccesstothehopper
ofthere.
• Thermostac protecon (80°С). The
thermostacproteconisedonthe
feederchute.Whenthesurfaceofthe
feederchutereaches80°С,thecontrol
stops the feeding of pellets into the
burnerandsignalsforfault(BBAlarm).
• Fuse. In case of electrical fault in the
system of the burner (short circuit,
currentoverload,etc.),theoverloadis
bornebytheelectricalfuseedonthe
maincontrolpaneloftheburner(10А).
• Power interrupon. Innovave
controller.Incaseofpowerinterrupon,
allparametersengsarestoredinthe
memory of the controller. Upon the
subsequent restart of the burner, the
controller resumes the execuon of
the program from the point when the
powerinterruponoccurred.
2.4.Designofpelletauger
The auger transports pellets from fuel
hopper to burner. Auger elements are:
augerpipe,augerhose,motor,conveyor
beltformovingthepellets.
Diagram 3. Design of pellet auger
2.5.DesignoffuelhopperFH500-V2
Pellet hopper, designated to serve
biomasspellet-redboilers.Pellethopper
design allowing installaon by choice
on either side of boiler. Made of cold-
rolled steel sheets with PVC coang.
Comfortablepelletcharginghatch.Pellets
insidehopperarefedintoaugerinorder
ofrecepon.Precisionlevelingofhopper
possibleviascrew-inlegs.Inspeconside
openingsforeasyemptyingandcleaning
offuelhopper.
Thehoppercapacityisdeterminedusing
as calculaon base the daily or weekly
fuel consumpon rate of burner. The
pellethopperusablevolumeof500liers
allows charging of 280-300 kg of pellets
with diameter 6-8mm, and top-up/rell
once a week (for burner of rated power
upto40kW).
