CHARNWOOD
COUNTRY 8B WOODBURNER
WITH BOILER
Operating
and
Installation Instructions
Bishop's Way, Newport, Isle Of Wight, PO3O 5WS, U.K.
Tel: (01983) 527552 Fax: (01983) 821267
the grate and cover with
SPECIAL POINTS
WHEN BURNING
HOUSE COAL
approximately 2 inches of fuel. Open
the air slides in the doors and open
the airwash control fully (see Fig. 1).
Light the paper or fire lighters. Close
the doors until the fuel is well ignited
then load with fuel and adjust the air
controls to the required setting.
Throat Plate
When loading the stove take care not
to smother the fire, instead fill the
firebox in two stages waiting between
each stage for the flames to appear
above the fire.
When relighting the stove, leave the
ash on the base, if burning wood or
peat, unless it is beginning to block
the slots in the front fence, in which
case some of it may be removed. If
burning solid fuel clear the grate and
empty the ashpan before relighting.
After a period of slumbering always
open the door air slides and wait
until flames appear above the fuel
bed before opening the doors.
Pull Forward
and Swing Down
Burning coal will produce more soot
deposits than other fuels, especially if
the fire is run at low levels for long
periods. It is therefore vital to clean
the throat plate regularly, weekly
cleaning is recommended.
Fig. 2. Throat Plate Position
and Lowering.
CONTROLLING THE
FIRE
ASH CLEARANCE
When burning wood or peat the ash
should be allowed to build up on the
base of the fire. It will only be
necessary to remove some ash once or
twice a week when it begins to
restrict the flow of air through the
front fence.
The rate of burning and hence the
output is controlled by the door air
slides and the airwash control (see
Fig. 1).
Never fully close the Airwash control
when burning coal.
RUNNING THE FIRE
WITH THE DOORS
OPEN
The air slides in the doors should be
used when lighting or when rapid
burning is required. They should not
be left fully open for long periods as
this can cause over-firing. For
overnight burning they should be
closed.
When burning coal or smokeless fuel
the ashpan should be emptied
The fire may be run with the doors
open if required. The more reactive
fuels, such as wood, peat, coal and
homefire, will burn better with the
doors open than fuels like phurnacite
and ancit. Do not leave the fire
unattended with the doors open.
regularly before it becomes too full,
generally once or twice a day. Never
allow the ash to accumulate in the
ashpan so that it comes in contact
with the underside of the grate as this
will seriously damage the grate. Care
should be taken to ensure that ash is
cool before emptying it into plastic
liners or bins. After emptying the
ashpan, poke the fire with a poker to
clear the firebed of ash.
The airwash control is used most of
the time to control the burning rate
and to keep the glass clean. Fully
extended gives full airwash for faster
burning and clean glass whereas fully
closed gives slow overnight burning.
It will not be possible to keep the
glass clean if this control is fully
closed, particularly after refuelling.
OVERNIGHT
BURNING
For overnight burning the fire doors
must be closed.
To make ash removal easier, when
burning coal or smokeless fuel, there
is a special Charnwood ash carrier
available. This enables the whole
ashpan to be placed in the sealed
carrier and taken outside. These may
be purchased from your supplier or,
in case of difficulty, from ourselves.
When burning wood load some large
logs on the fire and allow to burn for
half an hour before closing the door
air slides, (this will help to reduce tar
deposits in the chimney.) Leave the
airwash control slightly open to help
keep the glass clear.
REFUELLING
Keep the firebox well filled but do
not allow fuel to spill over the top of
the front fire bars.
Care should be taken, especially
when burning wood, that fuel does
not project over the front fire bars or
damage to the glass may be caused
when the doors are closed, it can also
cause the glass to black up.
When burning coal or smokeless fuel,
if the fire is very low then open the
air controls and revive the fire,
adding a small amount of fuel if
necessary. Empty the ashpan and
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Country 8B WB 10/00
poke the fire, load with fuel, and then
close the door air slides. The airwash
control should be kept slightly open
to help keep the door glass clean.
necessary to let the fire out
completely to carry out these
operations.
b) chimneys and flueways are clear,
c) that a suitable fuel is being used,
d) that there is an adequate air supply
into the room,
e) that an extractor fan is not fitted in
the same room as the stove.
f) there is sufficient draw in the
chimney. Once the chimney is warm
a draught reading of at least 2.5 mm
(0.10 inches) water gauge should be
obtained.
The front of the throat plate is pulled
forward and then lowered as shown
in Fig. 2. Any sooty deposits should
then be swept from the plate and into
the fire.
Some experimentation may be
necessary to find the setting most
suitable for the type of fuel being
used and the draw on the chimney.
To revive the fire, empty the ashpan,
(if burning coal or smokeless fuel),
poke the fire, and open the air
controls to maximum. When the fire
is burning well load on more fuel as
necessary and adjust the air controls
to the desired setting.
Return the throat plate to its correct
position - raise the front of the plate,
push it back and then lower it onto
the retaining lugs.
Door Glass Blacks Up
Differences in chimney draughts
mean that the best settings of the air
controls will vary for different
installations. A certain amount of
experimentation may be required,
however the following points should
be noted and with a little care should
enable the glass to be kept clean in
most situations:
CHIMNEY SWEEPING
The chimney should be swept at least
twice a year. Where the top outlet or
vertical rear flue connector is used it
will generally be possible to sweep
the chimney through the appliance.
CLEANING AND
MAINTENANCE
The stove is finished with a high
temperature paint which will
withstand the temperatures
encountered in normal use. This may
be cleaned with a damp lint-free cloth
when the stove is cold. Should
re-painting become necessary, high
temperature paints are available from
your supplier or from stove shops.
First remove the front fence and the
throat plate. Then sweep the chimney
ensuring that soot is removed from
all horizontal surfaces after sweeping.
a) The airwash relies on a supply of
heated air to keep the glass clean,
therefore, when lighting the stove
allow the firebed to become well
established before closing the
In situations where it is not possible
to sweep through the appliance the
installer will have provided
alternative means, such as a soot
door. After sweeping the chimney the
appliance flue outlet and the flue pipe
connecting the stove to the chimney
must be cleaned with a flue brush.
airslides. This may also be necessary
when re-fuelling the stove.
Most deposits on the glass may be
burnt off simply by running the fire
at a fast rate for a few minutes. If it
becomes necessary to clean the glass
then open the doors and allow them
to cool. Clean the glass using a damp
cloth and then wiping over with a dry
cloth. Any stubborn deposits on the
glass may be removed with a
proprietary stove glass cleaner or
ceramic hob cleaner. Do not use
abrasive cleaners or pads as theses
can scratch the surface which will
weaken the glass and cause
b) When re-fuelling keep the fuel as
far back from the front fence as
possible, do not try to fit too much
fuel into the firebox.
After clearing any soot from within
the stove, replace the throat plate (see
Fig. 2.) and the front fence.
c) Never completely close the airwash
control - as a guide it should be at
least a quarter open.
Different types of sweep’s brushes are
available to suit different flueways.
For standard brick chimneys a wire
centre sweep’s brush fitted with a
guide wheel is recommended. For
prefabricated insulated chimneys the
manufacturers instructions with
regard to sweeping should be
consulted.
d) The airslides in the doors may be
kept slightly open to assist in keeping
the glass clean.
e) Wet wood or logs overhanging the
front fence will cause the glass to
blacken.
premature failure.
It is always more difficult to keep the
glass clean when running the stove
very slowly for long periods.
THROAT PLATE AND
FLUEWAY CLEANING
TROUBLE SHOOTING
Fire Will Not Burn.
It is important that the throat plate
and all the stove flueways are kept
clean in order to prevent potentially
dangerous fume emission. They
should be cleaned at least monthly,
and more frequently if necessary. It is
If blackening of the glass still occurs
check that all flue connections and
the blanking plate are well sealed. It
is also important that the chimney
draw is sufficient and that it is not
affected by down-draught.. When the
Check that:
a) the air inlet is not obstructed in
any way,
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Country 8B WB 10/00
chimney is warm a draught reading
of at least 2.5 mm (0.10 inches)
water gauge should be obtained.
Fume Emission.
Over-Firing
Warning Note: Properly installed
and operated this appliance will not
emit fumes. Occasional fume from
de-ashing and re-fuelling may
occur. Persistent fume emission is
potentially dangerous and must not
be tolerated. If fume emission does
persist, then the following
If the fire is over-fired it will cause
premature failure of the internal fire
parts. Overfiring is occurring when
any parts of the fire begin to glow
red. To prevent over-firing ensure
that:
a) the door seals are kept in good
condition, and that the doors are
sealing correctly,
When burning coal some blackening
of the glass may occur below the
level of the front fence. This will not
obscure the view of the fire or affect
its performance.
Freezing
immediate actions should be taken:
b) the air controls on the fire is
working correctly,
c) a suitable fuel is being used,
d) the fire is not fitted onto a heating
system which is too large.
Do not light the fire if there is any
possibility that any parts of the
system may be frozen.
a) Open doors and windows to
ventilate the room.
b) Let the fire out and safely
dispose of the fuel from the
appliance.
c) Check for flue or chimney
blockage, and clean if required.
d) Do not attempt to re-light the
fire until cause of fume has been
identified, if necessary seek
professional advice.
Lack of Heat To
Radiators / Hot Water
Chimney Fires.
Check that:
If the chimney is thoroughly and
regularly swept, chimney fires should
not occur. However, if a chimney fire
does occur close the door air slides
and the airwash control, and tightly
close the doors of the appliance. This
should cause the chimney fire to go
out in which case the controls should
be kept closed until the stove has
gone out. The chimney and flueways
should then be cleaned. If the
a) the fire is burning properly - if not
then carry out the checks under “Fire
Will Not Burn”.
b) the throat plate is fitted correctly
(see Fig. 2.) and that it is not
distorted.
The most common cause of fume
emission is flueway or chimney
blockage. For your own safety these
must be kept clean.
c) the door seals are in good
condition.
d) If the hot water goes cold when
the pump is turned on, or if some
radiators are hotter than others, then
the system may need balancing, the
pump may be pumping the water too
quickly around the system, or the
radiators may need bleeding. Please
ask your installer to check these
points.
Fire blazing out of
control
chimney fire does not go out when
the above action is taken then the fire
brigade should be called immediately.
Check that :
a) The doors are tightly closed.
b) The airslides are turned down to
the minimum setting.
c) The airwash control is closed.
d) A suitable fuel is being used.
e) Door seals and airwash slide are
intact.
After a chimney fire the chimney
should be carefully examined for any
damage. Expert advice should be
sought if necessary.
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Country 8B WB 10/00
CHARNWOOD COUNTRY 8B WOODBURNER
INSTALLATION INSTRUCTIONS
or externally. These chimneys must
HEALTH AND SAFETY
CHIMNEY
be fitted in accordance with the
manufacturers instructions and
Building Regulations.
PRECAUTIONS
In order for the appliance to perform
satisfactorily the chimney height
must not be less than 4 metres
measured vertically from the outlet of
the stove to the top of the chimney.
The internal dimensions of the
chimney should preferably be 175
mm (7 inches) or 200mm (8 inches)
either square or round and MUST
NOT BE LESS THAN 150 mm (6
INCHES).
Please take care when installing the
stove that the requirements of the
Health and Safety at Work Act 1974
are met.
Single wall flue pipe is suitable for
connecting the stove to the chimney
but is not suitable for using for the
complete chimney.
Some types of fire cement are caustic
and should not be allowed to come
into contact with the skin. In case of
contact wash with plenty of water.
If it is found that there is excessive
draw in the chimney then a draught
stabilizer should be fitted.
If there is a possibility of disturbing
any asbestos in the course of
installation then please use
It is important that there is sufficient
draw in the chimney and that the
chimney does not suffer from
down-draught. When the chimney is
warm the draw should be not less
than 2.5mm (0.10 inches) water
gauge. If in doubt about the chimney
seek expert advice.
appropriate protective equipment.
Boiler
Output
(kW)
There must not be an extractor fan
fitted in the same room as the stove
as this can cause the appliance to
emit fumes into the room.
8.0
6.0
4.0
2.0
There must be an adequate air supply
into the room in which the appliance
is installed totalling at least 100
square cm. (16 square inches) to
provide combustion air. This is
particularly necessary if the room is
double glazed.
HEARTH AND FIRE
SURROUND
The stove must stand on a fireproof
hearth and must be situated at least
300mm (12 inches) from any
0
1.0
2.0
Space Output (kW)
combustible material. There must be
a gap behind the stove of at least
25mm to allow air to enter the
airwash inlets. The positioning of the
stove and the size of the hearth are
governed by building regulations for
Class 1 appliances. These building
regulations state that the hearth must
extend in front of the stove by at least
300mm (12 inches) and to the sides
of the stove by at least 150mm (6
inches). If in doubt as to the
In addition to these instructions the
requirements of BS.8303 and
BS.6461 Pt 1&2; 1984 must be
fulfilled. Local Authority Bylaws and
Building Regulations regarding the
installation of Solid Fuel burning
appliances, flues and chimneys must
also be observed.
Fig. 3. Performance Chart
If an existing chimney is to be used it
must be swept and checked, it must
be in good condition, free from
cracks and blockages, and should not
have an excessive cross sectional
area. If you find that the chimney is
in poor condition then expert advice
should be sought regarding the
necessity of having the chimney
lined. If it is found necessary to line
the chimney then a lining suitable for
Solid Fuel must be used.
PERFORMANCE
The output of the Country 8B WB is
7.0 kW (23,800 Btu/h) to water and
2.5 kW (8,500 Btu/h) to the room.
positioning of the stove expert advice
should be sought either from the
supplier or the local building
inspector.
These outputs are based on a 2 hourly
re-fuelling cycle burning seasoned
hardwood logs, or a 4 hourly
re-fuelling cycle burning smokeless
fuel.
The fireplace must allow good
circulation of air around the
appliance to ensure that maximum
heat is transferred to the room and
also to prevent the fireplace from
overheating. A gap of 150mm (6
If there is no existing chimney then a
prefabricated block chimney or a twin
walled insulated stainless steel flue to
BS.4543 can be used either internally
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Country 8B WB 10/00
inches) each side and 300mm (12
inches) above the appliance should
give sufficient air circulation. If a
wooden mantelpiece or beam is used
in the fireplace it should be a
22mm Open Vents
Feed and Expansion Tank
Overflow
Cold Water Tank
Overflow
minimum of 460mm (18 inches), and
preferably 600mm (24 inches) from
the appliance. In some situations it
may be necessary to shield the beam
or mantelpiece to protect it.
Domestic Hot Water Draw Off
Gravity Radiator
Drain Cock
Indirect Hot Water Cylinder
CENTRAL HEATING
SYSTEM
High Limit Thermostat
The central heating system must
comply with BS:5449 part 1.
Central Heating Flow
Circulating Pump
Low Limit
Thermostat
If the system is to be a combined
heating and domestic hot water
Central Heating Return
Drain Cock at Lowest Point
system then a double feed indirect hot
water storage cylinder to BS:1556
part 1 should be used. In order to
prevent the build up of scale and
corrosion a suitable inhibitor should
be used. The system must be correctly
vented as shown in Figs. 4 and 5.
The height differential between the
header tank and the appliance must
not exceed 15.2 metres (50 feet).
Fig. 4. Typical Central Heating & Hot Water System
Using 4 Boiler Tappings
22mm Open Vents
Feed and Expansion Tank
Cold Water Tank
Overflow
Overflow
Domestic Hot Water Draw Off
If all four boiler tappings are used
then, if possible, diagonal pairs
should be connected for domestic hot
water and central heating. Where a
common return is used an injector tee
must be incorporated into the system
as shown in Fig. 6. This will ensure
that a good domestic hot water supply
is maintained when the central
Gravity Radiator
Drain Cock
Indirect Hot Water Cylinder
High Limit Thermostat
Low Limit Thermostat
Circulating Pump
Central Heating Flow
heating pump is operating.
Central Heating Return
Drain Cock at Lowest Point
The system must incorporate a
gravity circuit which will normally
heat the domestic hot water and an
unvalved radiator with an output of at
least 1 kW. When the appliance is
not connected to a domestic hot water
system the unvalved radiator(s) on
the gravity circuit must have an
output of at least 1.25 kW. This is to
prevent boiling in case of pump
failure. All pipework in the primary
circuit must be 28 mm diameter and
the gravity flow pipe must rise
Injector Tee
Fig. 5. Typical Central Heating & Hot Water System
Using 3 Tappings
Gravity Return
(28mm Pipe)
Common Return to Boiler
(28mm Pipe)
Central Heating Return
continuously from the boiler to the
open vent. Two typical systems are
shown in Figures 4. and 5.
Fig. 6. Injector Tee.
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Country 8B WB 10/00
Back of the Stove
one return tapping is used. Set the
high limit thermostat at 85°C and the
low limit thermostat at 45°C.
Blanking Plate
Soot Door
In Side or Rear
Of Chimney
Radiators may be either manually or
thermostatically controlled.
Register Plate
CONNECTIONS TO
FLUES
Clamping Plate
with fold horizontal
Blanking Plate
There are several ways of connecting
the stove to the flue. These are
illustrated in Figs. 8 to 11.
Fig. 8. Vertical Register Plate
With Bricked Up Fireplace
Clamping plate finishes
flush with inside face of
firebox top and bottom.
Alternative
Soot Door
Positions
If the top flue connection, or the
optional vertical rear flue connector,
is used then chimney may be swept
through the appliance.
Seal Blanking Plate
with fire cement
Register Plate
With Soot Door
Horizontal lengths of flue must be
kept to a minimum and should not be
more than 150mm (6 inches) long.
The sealing face of the flue collar
must be coated with fire cement
before fixing to the body of the stove
using the two screws provided. The
blanking plate must be removed,
sealed with fire cement and refitted,
care being taken to ensure that the
fold on the blanking plate is in line
with the lugs on the firebox as shown
in Fig. 7. Ensure that the clamping
plate does not prevent the throat plate
from seating correctly. All flue
Fig. 7. Flue Blanking Plate.
If the appliance is used to heat a very
small central heating system then the
heat output to the room from the fire
will be reduced. Fig. 3. shows the
ratio of space heating to water
Fig. 9. Horizontal Register Plate
With Rear Flue Connection
Alternative
Soot Door
Positions
heating which can be expected.
Fitting a radiator in the same room as
the fire is recommended as it will
allow greater flexibility in the way
that the system is operated as well as
ensuring that there is sufficient heat.
Register P
With Soot
connections must be well sealed.
Connect the heating system to the
boiler ensuring that the primary flow
pipe rises continuously from the
appliance to the vent. Fill the system
with water and check for leaks.
SOOT DOORS
It is possible to pass a 16 inch
diameter sweeps brush through the
appliance but in most back outlet
installations it will be necessary to
have a soot door to enable the
chimney to be swept. The optional
vertical rear flue connector does
allow the chimney to be swept
through the stove.
Fig. 10. Horizontal Register Plate
With Top Flue Connection
Alternative
Soot Door
Positions
SYSTEM CONTROLS
Since the controls on the stove are
manually operated we strongly
recommend using high and low limit
pipe thermostats to control the pump.
The high limit, (anti-boiling,)
thermostat, should be fitted on the
gravity flow pipe as near to the boiler
as possible, and the low limit,
Register Plate
With Soot Door
Soot doors may either be in the actual
brickwork of the chimney or in the
register plate. Various positions of
soot doors are shown in Figs. 8 to 11.
(anti-condensation,) thermostat
should be fitted on the gravity return
- again as near to the boiler as
possible but ensuring that it is not on
the common part of the return if only
Fig. 11. Horizontal Register Plate
With Optional Vertical Rear Flue
Connector
PRE LIGHTING
CHECK
Ensure that the throat plate is fitted
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Country 8B WB 10/00
in the roof of the appliance. The
location and positioning of the throat
plate is shown in Fig. 2.
on the base of the stove before
lighting it and checking to ensure
that smoke and fumes are taken from
the appliance up the chimney and
emitted safely. Also check all joints
and seals. On completion of the
installation and commissioning
please leave the operating instruc-
tions with the customer and advise
them on the use of the appliance.
Before initial lighting check that the
front fence is fitted correctly and that
the doors tighten properly.
COMMISSIONING
On completion of the installation and
after allowing a suitable period of
time for the fire cement and mortar to
dry out, make a layer of ash or sand
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