First Firing - Heta Scan-line 7 Series Operating And Installation Instructions

Draft conditions
Poor draft may result in smoke being emitted
from the stove when the door is opened. The
minimum chimney draft to ensure satisfacto-
ry combustion in stoves of this kind is 12 PA.
However, there will still be a risk of smoke emis-
sion if the firing door is opened during power-
ful firing. The flue gas temperature at nominal
output is 237°C when expelled to an exterior
temperature of 23°C. The flue gas mass flow is
3.2 g/sec. The chimney draft is generated by the
difference between the high temperature of the
chimney and the low temperature of the fresh
air. The length and insulation of the chimney,
wind and weather conditions also have an effect
on the ability of the chimney to generate appro-
priate under pressure.
If the stove has not been used in a while, check
that the chimney and stove are not blocked with
soot, bird nests, etc., before using it.
instructions for use

first firing

The stove paint is fully cured from the factory,
but a minor unpleasant odour could still arise.
fuel
Your new stove is EN approved for firing with
wood fuel. You must therefore only burn clean,
dry wood in your stove. Never use your stove
to burn driftwood, as this may contain a lot of
salt which can damage both the stove and the
chimney. Similarly, you must not fire your stove
with refuse, painted wood, pressure-impregna-
ted wood or chipboard, as these materials can
emit poisonous fumes and smoke. Correct fi-
ring using well seasoned wood provides opti-
mal heat output and maximum economy. At the
same time, correct firing prevents environmental
damage in the form of smoke and emmissions
and also reduces the risk of chimney fires. If the
wood is wet and inadequately seasoned, a large
proportion of the energy in the fuel will be used
to vaporise the water, and this will all disappear
up the chimney. Thus it is important to use dry,
well seasoned wood, i.e. wood with a moisture
6
reduced draft can occur when:
• The difference in temperature is too small
– due to insufficient chimney insulation, for
example.
• The outdoor temperature is too high – in
summer, for example.
• No wind is blowing.
• The chimney is too low and sheltered.
• The chimney contains false air.
• The chimney and flue gas pipe are blocked.
• The house is too airtight (i.e. when there is
an insufficient supply of fresh air).
• Poor smoke extraction (poor draft conditi-
ons) due to a cold chimney or bad weather
conditions can be compensated for by
increasing the airflow into the stove.
Good draft occurs when:
• The difference in temperature between the
chimney and outdoor air is high.
• The weather is fine.
• The wind is blowing strongly.
• The chimney is of the correct height: at
least 4.00 m above the stove and free of the
roof ridge.
content of no more than 20%. This is achieved
by storing the wood for 1–2 years before use.
Pieces of firewood with a diameter of more than
10 cm should be split before storing. The pieces
of firewood should be of an appropriate length
(approx. 18 cm) so that they can lie flat on the
bed of embers. If you store your wood outdoors,
it is best to cover it.
examples of recommended
woods types
and their typical specific gravity per cubic meter
stated as 100% wood with a moisture content
of 18%
Wood kg/m
3
Beech 710
Oak 700
Ash 700
Elm 690
Maple 660
Birch 620
Mountain pine 600
Wood kg/m
3
Willow 560
Alder 540
Scotch pine 520
Larch 520
Lime 510
Spruce 450
Poplar 450