kunzel BT 2030, Operating Manual

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to check the buffer tank temperatures. The amount of fuel that can be fed to the boiler in specific cases
can differ greatly depending on the time of day, time of year and prevailing weather conditions. If in
doubt, we therefore recommend to feed, if anything, too little fuel to the boiler rather than too much.
Distribute the heating periods throughout the day so that the buffer tank is completely emptied in the
evening. Re-heat the boiler in the evening so that the boiler can be run at full load even with the night
setback feature activated and the buffers will still be well filled in the morning. This means that the
building will heat up much quicker once the night setback feature is deactivated.
Avoid cavity burning:
1. The wood should be dried until it reaches a water content of about 20%. In order to dry the wood
, it should be stored for a minimum of 2 years. The logs should have max. 30cm in circumference
and should have been split at least once. It is important to make sure that the logs are packed
closely together and there are no hollow spaces between them, otherwise there is a danger of
cavity burning, and the Wood Combustion Water Boiler cannot reach its full efficiency.
2. The basic firebed must be evenly distributed and should be around 5 cm thick. Kindling and thin
logs are first laid on this basic firebed, only then are the normal-sized logs added.
3. The logs are laid in the boiler with their split face downward (with the bark facing upward).
4. Large logs burn slower than small ones. For this reason, large logs should be placed in the middle
of the wood in the furnace.
5. When placing wood in the boiler ensure that none is touching the rear wall of the boiler because
otherwise no combustion air can reach the wood from the rear of the furnace chamber. An air gap
of about 1 cm should be left clear.
6. The firewood may not be thrown into the boiler; it must instead be placed in the boiler in layers as
show in the illustrations. In this way, it burns cleaner, longer and more uniformly.
7. If logs with a length of 1/3 m are used, these should be laid diagonally in the furnace chamber.
Another possibility is to stack one layer lengthwise, with then one or two layers crosswise in the
furnace chamber, as illustrated below.
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