Combustion Air Connection; Butterfly Valve; Regulating The Combustion Air - HASE Luno B.13 Mode D'emploi

9.

Combustion Air Connection

The combustion air in the fire box is solely supplied by a cu-
stomer-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 connec-
tions are either routed directly to the outside or connected
to a suitable air/flue 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). 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 4,5
meters should be used. Verification 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 21 m³/h at a maximum supply pressure of 4 Pa.
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 officer. At the air inlet opening, we recom-
mend installing an animal protection screen with
a mesh size of 10 mm.

10. Butterfly Valve

The butterfly valve (fig. 4/a) is an optional control element. It
is fitted in the flue pipe and used to regulate the flue gas flow,
and can thus slow down the burning-off process. When the
handle's position is diagonal to the flue pipe, the flue gas flow
rate is turned to minimum. We strongly recommend installing
a butterfly valve to reduce the output pressure. Please comply
with the country-specific legal regulations.
60
fig. 4
NOTE!
Make sure butterfly valve (fig. 4) is open before
opening the fire box door during the burning
phase.
CAUTION!
In the case of independent flue operation, the
installation of a throttle valve is not permitted
on account of the prescribed density.

11. Regulating the Combustion Air

To effectively guide the required volume of air to the right
places, a customized air flow 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 Luno stove
has an automatic primary air supply.
The secondary air is guided into the fire box via air ducts
from the top. It supplies the fire box with the volume of prehe-
ated oxygen necessary to completely burn off the wood gas
and, if used correctly, reduces the build up of soot on the fire
box windows.
a
NOTE!
When lighting the fire and adding fuel, you use
the air slider (fig. 5) to regulate the combustion
air.
For regulating the secondary air, the following general rule
applies: a small fire requires little secondary air; a large fire
requires ample secondary air.
WARNING!
If the air slider (fig. 5) is closed too tightly, there
is a risk that the flue gases will not burn com-
pletely (smouldering fire), that soot will build
up on the fire box window, or that the amassed
wood gases will burn explosively (overfiring/
deflagration).
CAUTION!
During operation, the air slider (fig. 5) should
never be completely closed. In contrast, ho-
wever, the fire box door and ash compartment
must always be tightly shut.
NOTE!
When the stove is not in use, the airflow slider
should remain completely closed to avoid heat
loss due to unintentional cold air influx.