Combustion Air Connection; Butterfly Valve; Regulating The Combustion Air - HASE SENDAI PRO 165 Mode D'emploi

CAUTION!
When operated as a direct vent stove, the
flue pipe connection to the chimney has
to be gas proof and sealed with a suitable
sealing cord and heat-resistant silicone.
Ensure that all connections points at the
flue pipe connecting piece and at multiple
section flue pipes are sealed with HASE
sealing paste (see Installation Instructions).

6. Combustion Air Connection

The combustion air in the fire 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/flue gas system (AFS). Another option
is to provide the supply air from a room that has its
own independent outside air supply (e.g. cellar or
basement).
The on-site duct to the air supply must be
sufficiently sealed and conform to the requirements
of air ducts according to DIN EN 12237 and
DIN EN 13180 of sealing class C-D. Equivalent
alternatives are permitted.
The air duct has a minimum diameter of 100 mm
with a maximum of two 90° bends and a maximum
permitted total length of 4.5 m. Designs using longer
piping and pipes with more than two bends have
to be verified through calculations. The required
supply of combustion air has to be ensured (see
Part 1 "Technical Data"). The air supply pipe has to
be equipped with suitable inspection openings for
inspection and cleaning purposes. The entire air
supply pipe has to be airtight and must sufficiently
insulate against all possible condensation with
a water-resistant, insulating material. We advise
discussing this with your local planning officer.
The air inlet cross-section must match the cross-
section of the pipe at the inlet opening. At the
air inlet opening, we recommend installing an
animal protection screen with a mesh size of
10 mm.

7. Butterfly Valve

The butterfly valve (fig. 2/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. In the case of increased pump
pressure in the chimney unit, we recommend installing
a butterfly valve.
Please comply with the country-specific legal
regulations.
NOTE!
Make sure the butterfly valve (fig. 2/a)
is open before opening the fire box door
during the burning phase.
CAUTION!
With direct vent stove operation, the
installation of a butterfly valve is not
permitted due to the required air tightness.
a
fig. 2

8. Regulating the Combustion Air

We develop an individual air duct routing for each
HASE stove model, to ensure that the necessary
combustion air is guided to the right areas in the fire
box.
The primary air supplies the glowing embers with
oxygen. The secondary air is heated and guided to
the flame area. It minimises the formation of soot
on the fire box windows.
In addition, some stove models also use tertiary air,
which is usually drawn up the back of the fire box.
Depending on whether they are designed for burning
wood or for burning both wood and lignite (brown
coal), the stove models have either one or two
combustion air control elements. For information
on setting and regulating the combustion air control
elements, please see Part 1 of the operating
instructions.
WARNING!
Burning wood when the primary air slider
is opened too wide poses the risk of
overheating the stove (forge fire effect).
en
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