Installationsanvisning Janfire Flex - a
IA Brännare Flex-a R2 SV
Janfire 2009 8(19
)
3 Operational Description
An external auger feeds pellets from an external storage bin to a receptacle located in the top of
the burner (internal hopper). An internal dosage auger then feeds the pellets to a drop shut where
they fall freely into the combustion chamber or burning bowl/cup; this eliminates the possibility of
reverse combustion.
A variable speed fan supplies the burner with primary and secondary air. On its way to the burning
cup the air cools heat-exposed parts of the burner. The correct amount of air is then fed to the
burning cup for primary and secondary combustion. The ignition coil preheats the air for automatic
ignition. Burner cup sensor (flame guard) detects pellet ignition. If ignition does not take place shuts
the burner down.
OBS!
If the draft is insufficient the hot flue gases will rise backwards into the drop chute. If the drop
chute temperature rises to the highest allowed level 140°C shuts the burner down.
If it still is too
hot, the water safety device blows.
The power is determined by the chosen power level and is adjusted by the thermostat of the boiler.
Except for the standby output level of about 600 W, the burner output can be set between: 9 kW,
12 kW, 15 kW and18 kW. These burner output levels are based on a pellet weight density of 675
g/l and an energy content of 4.8 kWh/kg. To adjust for variations in the burner output and
combustion levels when using pellets with another weight or energy content the levels can be
changed here. The different output levels can be fine tuned to produce the best overall combustion
result.
High quality pellets produce high efficiency and output. High quality pellets are solid wood pellets
6-10 mm in diameter with little sawdust. Moisture levels should be no higher than 10%, ash
content no higher than 1% weight, and energy content should be about 4.7 - 5.0 kWh/kg. Always
verify the energy density and volume weight values for the pellets upon delivery.
Burner is intended for wood pellets according to SS 187120 group1-3(Sweden); DIN 51731 size
HP2 (Germany).
