Kalfire W Series, Installation And User Manual, Page: 41 / 68

5.6.1 Topping up with wood
To maintain optimal heat output, top up the fire with new wood
as soon as the flames have disappeared and the logs are starting
to glow (no smoke development). To add new logs, you need to
open the door slowly, to prevent smoke escaping into the room
because of the sudden draught. Do not add more than 2 to 3 logs
(see maximum weight wood, table 5). When the logs are burning
strongly, you can close damper (if installed) again.
A rule of thumb: 1 kg of wood provides about 4 kW of energy.
The Kalfire W is suitable for discontinuous use. This is achieved by
burning according to table 5.
5.7 Operation the damper (optional)
Depending on the situation, an external damper can be
connected to the fireplace (see section 3.6). Attention! It is not
necessary to install a damper in all situations! After the installer
has installed the damper, you can operate it using the knob on the
side of the surround.
When using an original Kalfire damper, the letters “Auf or +” on
the knob show the open position. “Zu or -” is the closed position.
Set the required position by turning the knob. The position of
the damper depends on the draught in the flue and the way the
appliance is being used:
When lighting the
fire Damper fully open.
When burning
with closed door The damper can be closed to 20-50%
which will calm the flames. If you want
to top up wood, open the damper
completely, before opening the door.
When the wood is burning to your
satisfaction, you can partly close the
damper again.
Open door use
Kalfire W45/48F
We advise you to keep the door of the Kalfire W45/48F door
closed, until there is a good glowing bed and the Kalfire W45/48F
is well heated (high temperature of the skamol plates and in the
combustion chamber). This ensures the flue gas is exhausted
correctly.
If the appliance is used with the door open straight away, there is
only a minimum of pull in the chimney. The flue gasses will not be
exhausted correctly, but will flow back into the room.
When the logs have been burnt, position new logs on the glowing
bed in the same way as explained above. Take the amount of
wood indicated per hour into account.
Kalfire W65/38C and W90/47C
These appliances can be used with the door open or closed. If you
use the appliance with the door open, we strongly advise you to
remove the baffle plate in order to guarantee optimal pull of the
flue gasses.
By definition, the 3-sided and corner models are less
suitable for use as an open fire than the front opening
models. If the Kalfire W65/38C, W66/48S, W90/47C or
W90/47S models are used with the door open, smoke
may be blown into the room even if both baffles have been
removed.
The degree to which you can successfully use the
appliances open greatly depends on the flue duct and the
draught it exerts.
Kalfire W80/52T and W105/47T
The Kalfire W80/52T and W105/47T are not suitable to be used
when open. Only open the door of the firebox if strictly necessary
(e.g. to add logs).
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