Charnwood Stove Country 8B User Manual

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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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  
Page 6  
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  
Page 8  
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  
Page 9  
Country 8B WB 10/00  
 

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