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OPERATING INSTRUCTIONS
9.2 Fuel Quality (Solid Fuel)
Use only recommended solid fuels, which are approved for
use with closed appliances. Symptoms of poor performance
related to unsuitable fuels include:
• Difficulty getting a fire going and keeping it burning well
• Smoky fires with little flame
• Dirty glass
• Dirty firebricks
• Short life span for grate, baffles and internal firebricks
• Permanent staining of glass
9.3 Backpuffing
This is caused by a lack of combustion air entering the
firebox causing combustion gases to build up in the firebox
and periodically ignite as small explosions, causing smoke to
puff out of the appliance air inlets and other openings. The
problem will often occur if the air controls are shut soon
after adding new fuel to a very hot fire. To stop backpuffing
occurring open the air controls to increase the combustion
air and increase the burning rate.
9.4 Flue Draught
The chimney has two main functions, which are, to safely
remove the smoke, gases and fumes from the house, and to
provide a sufficient amount of draught (suction) in the stove
to ensure that the fire is kept burning. Draught is caused by
the rising hot air in the chimney when the stove is lit.
Symptoms of poor performance related to flue draught
include:
• Excessive fuel consumption (high flue draught)
• Poor burning control, overheating (high flue draught)
• Wind noise from air controls (high flue draught)
• Difficulty getting a fire going and keeping it burning well
(low flue draught)
• Low heat output (low flue draught)
• Smoke entering room when doors opened (low flue
draught)
The construction, position, size and height of the chimney
are all factors that affect the performance of the flue
draught.
Other factors that can effect the flue draught include:
• Trees or other buildings nearby causing turbulence
• High and gusty winds
• Outside temperature
• Outside weather conditions
• Incorrect additional ventilation to building
• Blocked flue / chimney
For advice on the correction of persistent flue problems
consult a qualified solid fuel heating engineer before
continuing to use the stove.
9.5 Weather conditions
The weather conditions outside the building could have an
effect on the burning performance of the stove. These could
include:
7. ASH REMOVAL (Multi-fuel stoves)
7.1 The burning of any fuel will produce ash, which will have
to be removed after a period of use. This time will depend
on the fuel used. Before removing the ash from the stove it
is advisable to let the fire burn down to a low level, or even
go out completely. The ashpan can then be removed using
gloved hands, after opening the main firedoors.
7.2 As heat can remain in the ash for a long period after use
care must be taken when removing and carrying the full
ashpan. We suggest that the ashpan be carried using gloved
hands, or the ash is placed directly in to a Stovax Ash
Caddy (Stovax Part No. 4227).
7.3 Do not place ash in a bin made from plastic or any other
combustible material.
8. ASH REMOVAL (Wood-burning stoves)
8.1 When burning wood the amount of ash will be smaller and
may only need removal once every week. To do this, allow
the fire to burn out and cool. Open the main door, then
after removing the log retainer scoop out the ash with a
suitable shovel. It is best to leave a layer of ash in the stove
to form a bed for the new fire.
8.2 Do not place ash in a bin made from plastic or any other
combustible material.
9. BURNING PERFORMANCE
9.1 Fuel Quality (Wood)
Use only seasoned wood with a moisture content of
less than 20%. Well seasoned logs should have the bark
beginning to lift and peel away, along with deep cracks
radiating from the centre of the log. Logs should feel lighter
than fresh cut wood of a similar size and sound hollow
when struck against each other. Logs should not feel damp
to the touch, have any visible moisture oozing from them or
moss and fungal growths on them.
Symptoms of poor performance related to wet woods
include:
• Difficulty getting a fire going and keeping it burning well,
• Smoky fires with little flame,
• Dirty glass,
• Dirty firebricks,
• Rapid creosote build-up in the chimney,
• Low heat output,
• Short burn times, excessive fuel consumption and
blue/grey smoke from the chimney.
To help avoid large build-ups of tars and creosote within
the stove and the flue system, it is recommended to burn
at high output for at least 30 minutes each day. The use of
Stovax Protector chimney cleaner will also help to reduce
this problem.