10
Firewood burning
•
Position the power switch (6) to ON.
•
Put about eight 50 cm long pieces of
wood evenly onto the fire bar, altogether
weighing about 6 kg, and insert paper or
birch bark in between to ensure ignition.
•
Fire the wood and start the smoke ex-
hauster by rotating the thermostat to posi-
tion 0. The filling hatch is kept slightly
open during ignition.
•
Wait 15-20 minutes to allow about a 10
cm layer of live coals to form on the bar.
•
Charge blocks (about 18-20 birch logs
altogether weighing about 32 kg) evenly
and closely, bark upward, onto the bar so
that the blocks touch the rear wall of the
furnace.
•
Set the smoke exhauster thermostat to the
setpoint which is about 90 ºC. The set-
point is correct if the smoke exhauster
stops when there is a small amount of
coals left in the boiler.
•
Put new blocks onto the remaining coals.
One firewood charge will burn about 2.5
hours producing about 100 kW heat, i.e. a
1800 liter energy accumulator will be heated
to approximately 50 ºC.
If the boiler has not been used for a long
while, use a small amount of firewood for the
first burning to avoid bar splitting by boiling
water that could soak in the ceramic fire bar.
Charge the firewood on the fire bar so that
it does not block the firing hole located in
the middle of the bar.
