Working Combustion Air - Kalfire W Series Installation And User Manual

3.3.1 Working combustion air

If used with a closed door, the Kalfire W takes the combustion
air directly from the connection at the rear (A) or base (A') of
the appliance. This combustion air is guided into the combustion
chamber via de air control (B) and the primary thermostat (C),
where it is used as primary or secondary combustion air.
Primary combustion air (p)
The thermostat regulates this air flow automatically. When
the fireplace is cold the thermostat ensures that air enters the
combustion chamber via the lower spoiler. As the fireplace warms
up, the air flow will gradually decrease.
After approximately 50 minutes, the fireplace is so warm, that this
air flow stops altogether.
The primary air control is 100% automatic and cannot be
influenced by yourself.
Secondary combustion air (S)
The air flow is regulated manually via the operating feature to
the right of the appliance. Via risers to the left and right of the
combustion chamber, this air is warmed up and guided to the
combustion chamber via the upper spoiler. The secondary air flow
is used to regulate the flames and to keep the glass door clean.
This air flow may therefore never be completely closed off.
If used with an open door, the air need of the fireplace changes.
The opening at the front will cause large volumes of air to be
sucked into the appliance. This air will be taken from the room the
fireplace is installed in.
With an opened door, the built-in valve ensures that the passage
to the combustion chamber is closed (see figure). The connected
air is re-routed to the convection casing, where the air is warmed
before it flows into the room. This air then becomes available in
the room where the appliance is installed so it can be used in the
combustion process.
Detail "valve closed"
Detail "valve open"
15