Flue Pipe Connection; Combustion Air Connection; Butterfly Valve - HASE SENDAI 175 Operating Instructions Manual

5. Flue Pipe Connection

The stove has to be connected to the chimney with
a flue pipe with an inside diameter of 15 cm. Please
ensure that all pipe pieces are tightly fit at the con-
nection junctions. We recommend using elbow
pipes with cleaning hatches.
CAUTION!
The flue pipe must be well sealed at the
chimney entrance and cannot project into
the inner cavity of the chimney; other-
wise the flue gas venting will be impaired
(fig. 1).

. 1
fig
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 Instruc-
tions).
38

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 suit-
able 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 base-
ment).
The customer-provided air inlet duct has to be con-
structed using plain, smooth pipes (steel pipes in
compliance with 24145, drain pipes in accordance
with DIN 19534 and EN 1451B) with a minimum di-
ameter of 100 mm, a maximum of two bends and
a permissible total length of 4.5 m. Designs using
longer piping and pipes with more than two bends
have to be verified through calculations. The re-
quired supply of combustion air has to be ensured
(see Part 1 "Technical Data"). The air supply pipe
has to be equipped with suitable inspection open-
ings for inspection and cleaning purposes. The
entire air supply pipe has to be airtight and must
sufficiently insulate against all possible condensa-
tion with a water-resistant, insulating material. We
advise discussing this with your local planning of-
ficer. At the air inlet opening, we recommend install-
ing 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 regu-
late 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 in-
stalling 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 dur-
ing the burning phase.
CAUTION!
With direct vent stove operation, the in-
stallation of a butterfly valve is not permit-
ted due to the required air tightness
a
fig. 2