Clock Woodburners Compact 5kw Blithfield Manuel de l'utilisateur - Page 9
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Important Information for
Wood Burning
With a full load of wood and burning near
nominal output the stove will need to be refuelled
approximately every 1-1.5 hours. (One or two
large logs will burn longer than a number of
smaller ones). Wood can usually be stacked higher
in the stove than solid mineral fuel but care must
be taken that logs do not touch the baffle or the
glass panel. Do not stack logs above the level
of the tertiary air inlet in the rear ceramic firebox
liners at the back of the stove.
Always make sure that flames are visible above
the wood after re-fuelling for the cleanest burn.
Burning without flames above the fuel will create
unnecessary smoke. After re-fuelling open the
single air control fully to the (left) side for 3
minutes or until the logs are fully blackened to
achieve full flames above the fuel.
Wood burns best on a bed of ash and it is
therefore only necessary to remove surplus ash
from the stove occasionally. Burn only dry, well-
seasoned wood, which should have been cut, split
and stacked - under cover from rain - for at least
12-24 months with free air movement around the
sides of the stack to enable it to dry out. Burning
wet or unseasoned wood will create tar deposits
in the stove and chimney and will not produce a
satisfactory heat output. Wood that is not properly
dry ('dry' is considered to be less than 20%
internal moisture content) uses up energy from
the burn process to evaporate the water inside
the wood thus creating very poor conditions for
combustion. The main cause of burning problems
with wood stoves is due to excessively damp
wood. Wood can appear perfectly dry on the
outside but still contain 40-50% water content on
the inside. A moisture meter can be purchased a
from stove and equipment suppliers if you wish to
check your wood source is correct. Split a log and
check the inside as well as the outside.
Be sure to check both inside and outside of log.
Refuelling on to a low fire bed - If there is
insufficient burning material in the fire bed to
light a new fuel charge, excessive smoke emission
can occur. Refuelling must be carried out onto a
sufficient quantity of glowing embers and ash so
that the new fuel charge will ignite in a reasonable
period. If there are too few embers in the fire bed,
add suitable kindling to prevent excessive smoke.
Fuel overloading - The maximum amount of fuel
specified in this manual should not be exceeded,
overloading can cause excess smoke. Never
9 | Clock Multi Manual
load fuel above the bottom edge of the tertiary
air profiling in the back ceramic firebox liner or
allow them to touch the glass. All models max
log diameter = approx. 150mm. Max length =
300mm for 5kW, 400mm for 5kW Wide, 400mm-
650mm (taper firebox) for 8.5kW models. One
log is acceptable ONLY if loading onto a hot well
established fire bed.
Operation with door left open - Operation
with the door open can cause excess smoke and
spillage into the room. The appliance must not be
operated with the appliance door left open.
De ashing - never let the ash pan over fill or build
up to the underside of the grate. When burning
wood it is a good idea to allow 10mm build up of
ash on top of the grate. When burning smokeless
briquetted fuel always clean out after use when
cooled. Be aware there may still be hot material
within the ash.
Smokeless Briquetted Fuel - Smokeless and coal
type fuels require very different burning conditions
to wood burning and the single air control has
been designed to allow for this. Use the control on
the right side of its travel marked 'Coal' for best
efficiency on these types of fuel. Maxibrite and
other smokeless briquetted fuels can burn with
very little primary air and stay in for many hours to
be revived after an overnight burn for example