Stovax Riva Plus Midi Wood & Multi-fuel - Manual (Page 8)

8
UseR INsTRUCTIoNs
6.3 Air inlets puffing smoke
Combustion gases build up in the firebox and ignite as small
explosions, causing smoke to puff out of the air inlets and
other openings. This occurs if the air controls are shut soon
after adding new fuel to a very hot fire. Stop by opening the
air controls to increase combustion air and burning rate.
6.4 Flue draught
The chimney has two main functions:
1) To safely remove the smoke, gases and fumes from the
house.
2) To provide a sufficient amount of draught (suction) in the
appliance ensuring the fire keeps burning.
Draught is caused by the rising hot air in the chimney when
the appliance 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
all affect the performance of the flue draught.
Other factors effecting 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 appliance.
6.5 Weather conditions
The weather conditions outside the building can effect the
burning performance of the appliance. These could include:
Weather Conditions Problem effect
Windy days Buildings/Obstacles
cause turbulent air
around chimney.
Smoky Appliance
Calm days Oversized Chimney. Smoky Appliance
damp / Rainy days Flue temperature
not hot enough.
Rain water inside
chimney.
Lighting and
burning problems
• This position gives full heat out put for burning solid fuel
but may discolour the glass, Diagram 13.
5.4 Do not burn large amounts of fuel with the Control on
low settings for long periods of time. This reduces the glass
cleaning effect of the airwash and causes tars and creosotes
to build-up in the appliance and flue system.
5.5 When in use, burning the appliance at high output for a
short period day also reduces tars and creosote.
5.6 You must burn only anthracite or smokeless fuels
suitable for use in closed appliances .
5.7 do not burn bituminous coal, ‘petro-coke’ or other
petroleum based fuels as this invalidates the product
guarantee .
do not load fuel above the log guard and the secondary
combustion inlets at the back of the firebox.
See Diagram 7
6. BURNING TIPs
6.1 Fuel Quality (Wood)
Use wood with a moisture content of less than 20%.
Seasoned logs have the bark beginning to lift and peel away
and cracks radiating from the centre. They feel lighter than
fresh cut wood of a similar size and sound hollow when
struck against each other. Logs should not feel damp or
have moss and fungal growths.
Symptoms related to wet wood:
—
Difficulty starting and keeping a fire burning well
—
Smoke and small flames
—
Dirty glass and/or firebricks
—
Rapid creosote build-up in the chimney
—
Low heat output
—
Short burn times, excessive fuel consumption and
blue/grey smoke from the chimney
• Burn at high output for a short period each day to avoid
large build-ups of tars and creosote within the appliance
and the flue system
• Use Stovax Protector chimney cleaner to reduce this
problem
6.2 Fuel Quality (solid Fuel)
• Use recommended solid fuels approved for use with
closed appliances.
Symptoms related to unsuitable fuels include:
—
Difficulty starting and keeping a fire burning well
—
Smoke and small flames
—
Dirty glass and/or firebricks
—
Short life span for grate, baffles and internal firebricks
—
Permanent staining of glass