Bodart & Gonay Optifire OPTI700, Instructions For Use And Maintenance Manual

Page: 34 / 40

33 Optifi re
A
B
D' D' D
D D
- In case of a double fl ue:
- choose the best,
- seal the unused one.
- In case of a side connection on an existing fl ue, carry
out one of the following two assemblies:
- It is essential that the connection is airtight.
“Breeching” to prevent
soot build-up
Airtight connec-
tion
Soot trap
Max
45°
3. Combustion air and outside air supply
When a fi replace burns wood, it consumes air , which
means that a certain quantity of air exits by the chimney
D . This air must be compensated for by the normal inlets,
A and B , and if the latter are insuffi cient, a new clean air
inlet C must be added. The presence of a ventilator hood
in the same living space creates an additional air outlet
D ’, which must also be compensated for.
Indicative value of C in accordance with the diameter of
the chimney and the air tightness of the house:
You must provide a fresh air inlet of 30 cm²/KW, i.e.
150 cm2.
- Preferably, this inlet will be near the fi replace. This is
in order to avoid currents of cold air across the room, a
vacuum in the premises and to help let fresh air in.
4. Convection air (hot air)
Hot air produced by the fi replace leaves directly by the space above the door.
However, it is possible to connect, in addition, 4 hot air pipes on the top of the fi replace. This allows even
more heat to be extracted and/or the heat to be sent to a diff erent room from the one where the fi replace
is situated. The contribution of these outlets remains restricted to +/- 1 KW per outlet. Heat-insulated pipes
are recommended for the appliance to work at its best (they create a «draught» for convection air).
When installing these pipes, limit the length and changes in direction, bend at an angle at the widest
change in direction and avoid the use of outlet grills with a low permeability coeffi
cient, as the resulting
losses in speed reduce the eff ectiveness of hot air outlets.