Combustion Air Connection Tula Direct Vent Stove; Butterfl Y Valve Tula Standard; Fuel Load Sizes And Thermal Output; Regulating The Combustion Air - HASE Tula Mode D'emploi

8.

Combustion Air Connection Tula direct vent stove

The combustion air in the fi re box is solely supplied by a
customer-provided supply air pipe and the Hase Air System
pipe connections. The connecting piece for the Hase Air
system is located on the back side of the stove. The sealed
pipe connections are either routed directly to the outside or
connected to a suitable air/fl ue gas system (AFS). Another
option is to provide the supply air from a room with its own
independent outside air supply (e.g. cellar or basement) (see
fi gs.12 - 14). For the customer-provided installation of the air
inlet, plain pipes (steel pipes in compliance with 24145, drain
pipes in accordance with DIN 19534 and EN 1451B) with a
minimum diameter of 100 mm, a maximum of two bends
and a permissible total length of 5 meters should be used.
Verifi cation by calculation is required for longer piping and
more than two bends. Make sure that the combustion air
supply meets the required combustion air volume of 16m³/h
at a maximum supply pressure of 4Pa.
The air supply pipe has to be equipped with an inspection
opening for inspecting and cleaning purposes. The entire air
supply pipe has to be airtight. We advise discussing this with
your local planning offi cer. At the air inlet opening, we recom-
mend installing an animal protection screen with
a mesh size of 10 mm.
9. Butterfl y Valve Tula Standard
The butterfl y valve (fi g. 4/1) is an optional control element. It
is fi tted in the fl ue pipe and used to regulate the fl ue gas fl ow,
and can thus slow down the burning-off process. When the
handle's position is diagonal to the fl ue pipe, the fl ue gas fl ow
rate is turned to minimum. We strongly recommend installing
a butterfl y valve to reduce the output pressure. Please comply
with the country-specifi c legal regulations.
fi g. 4
NOTE!
Make sure butterfl y valve (fi g. 4) is open
before opening the fi re box door during the
burning phase.

10. Fuel Load Sizes and Thermal Output

The thermal output depends on the amount of fuel you put in
the stove. When adding more fuel, please do not exceed the
maximum fuel load size of 1.5 kg. Exceeding the maximum
fuel load size leads to a danger of overheating, which can
result in damage to the stove and the risk of a stove fi re.
NOTE!
To attain a thermal output of approx. 5 kWm,
burn wood logs that weigh 1.2 kg and are no
longer than 25 cm in length for about 45 min.
NOTE!
To attain a thermal output of approx. 3.0 kWm,
burn wood logs that weigh 0.5 kg and are no
longer than 25 cm in length for about 45 min.
The Tula is intended for intermittent operation, please only
apply one fuel layer at a time.
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11. Regulating the Combustion Air

To effectively guide the required volume of air to the right
places, a customized air fl ow system has been developed for
your Hase stove.
The primary air supplies oxygen to the glowing embers and is
used mainly during the warming up phase. The secondary air
is guided into the fi re box via air ducts from the top. It supplies
the fi re box with the volume of preheated oxygen necessary
to completely burn off the wood gas and, if used correctly,
reduces the build up of soot on the fi re box windows.
The Tula stove has an automatic primary air supply.
When lighting the fi re and adding fuel, you use the
secondary air slider (fi g. 5/1) to regulate the combu-
stion air.
For regulating the secondary air, the following general rule
applies: a small fi re requires little secondary air; a large fi re
requires ample secondary air.
WARNING!
If the secondary air slider (fi g. 5) is closed too
tightly, there is a risk that the fl ue gases will
not burn completely (smouldering fi re), that
soot will build up on the fi re box window, or
that the amassed wood gases will burn explo-
sively (overfi ring/defl agration).
CAUTION!
During operation, the secondary air slider
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