Contura 750, Installation Instructions Manual, Page: 26 / 28

GB
18
Lighting Instructions
It is important that the correct amount of wood is used, espe-
cially when lighting. If you are lighting the fire for the first time
you should use a set of scales to see how much 2.0 kg kindling is.
Also check what the normal and maximum weights look like.
The stove may only be lit with the hatch closed.
Always open the hatch carefully and slowly to prevent blow back
because of the changing pressure in the stove.
The function of the stove differs depending on the draft condi-
tions in the chimney. Achieving the correct setting for the
combustion air damper, suitable size and amount of wood usually
takes a few attempts.
Lighting in the
right way
Correctly sized wood
Lighting
Adding wood
Note that if too little kindling is used when lighting, or if the
wood is too thickly cut, the firebox will not reach the correct
operating temperature. Incorrect lighting can lead to poor com-
bustion with heavy sooting and may result in the fire going out
when the hatch is shut.
If the house has mechanical ventilation, open a window near to
the fireplace prior to lighting. Leave the window open for a few
minutes until the fire has caught properly.
Kindling: Finely chopped wood
Length: 25-30 cm
Diameter: 2 - 5 cm
Amount per firing: 2.0 kg
(approx. 10-12 finely chopped pieces)
Feeding Wood: Chopped wood
Length: 25-30 cm
Diameter: 7 - 9 cm
Normal amount: 1.3 kg/hour (2 pieces)
Max amount: 2.4 kg/hour (max 3
pieces per insertion. Max 1.8 kg per insertion)
It is important that the wood catches fire
quickly. Quick lighting is achieved by opening the
combustion air damper fully or by leaving the
hatch ajar for a moment.
Pyre lighting produces a lot of smoke and can
cause quick gas ignition in the worst instance
resulting in hearth damage.
Important!
NOTE!
The left hand handle that controls the grate disc must be
closed during lighting.
1. Open the control for the combustion air fully.
2. Insert paper or firelighters and about 2.0 kg of thinly chopped
kindling into the firebox. Stack the wood crosswise.
3. Light the fire.
4. Set the hatch to the lighting position, that is with the lower
hook against the lock roller to create a sufficient gap (see
figure).
5. When the fire has caught fully after approx 5-10 minutes,
close the hatch completely.
6. A slight amount of soot may build up on side glass during the
start-up fire. This is normal and vanishes after a period.
7. A fresh load of logs should not be put on until the start-up fire
has become a glowing bed of embers.
1. Open the hatch a few centimetres and allow the vacuum in the
firebox to equalise for a few seconds before opening the hatch
fully.
2. Add 2-3 logs of a combined weight of approx 1.2–1.5 kg. Lay
the logs diagonally on each other so that the flame can take
easily. Then close the hatch.
3. The combustion damper must be completely open for 3-5
minutes or until the logs turn black and catch fire. If slower
combustion is then required, the supply of combustion air can
be reduced. The conditions for controlling combustion vary
depending on the temperature in the firebox and the draft in
the chimney.
4. An average energy output of 5 kW is achieved when the com-
bustion air damper is 40% open and 2 logs weighing about
1.3-1.5 kg are added once per hour.
5. The lowest output of 3-4 kW is obtained when the combus-
tion air damper is 30% open. In this operating position it is
important that the combustion air damper is fully open for the
first 3-5 minutes so that the wood has time to ignite properly
before the supply of combustion air is reduced. A condition
for regulating the output is a thick bed of embers and high
temperature in the firebox. When the fire has died down to
embers more wood should be added.