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H E R A L D 8
S L I M L I N E
C E
M U L T I F U E L
C L E A N B U R N
S T O V E
Installation and Operating Instructions
A Hetas certified engineer must carry out the installation of this appliance;
alternatively, your local Building Control Officer can approve the completed
installation, should a non-certified engineer undertake the installation. It is an
offence, under UK law, not to comply with this advice. Please hand these
instructions to the stove user when the installation is complete. Leave the
system ready for operation and instruct the user in the correct use of the
appliance and operation of controls.
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Herald 8 Slimline CE
Technical Specification
Stove Mass 108 kg
Wood
Total Efficiency 73.0 %
Nominal Heat Output 6.0 KW
Mean CO Emission (at 13% O2) 0.38 %
Mean Flue Gas Temperature 293 °C
Flue Gas Mass Flow 6.4 g/s
This appliance is not suitable for use in a shared flue
This appliance is suitable for intermittent burning
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Assembly Instructions
PLEASE READ THESE INSTRUCTIONS CAREFULLY
It is important that your stove is correctly installed, as Hunter Stoves Limited cannot
accept responsibility for any fault arising through incorrect use or installation.
Flue Collar
Place the Flue Gasket on the top, or rear outlet as required. Place the Flue Collar on top of the
Gasket. Secure to the four locating tabs, inside the flue outlet, using the M6 nuts & bolts
supplied. Fit the 2 - M8 carriage bolts, washers & nuts into the Damper Holes, located on each
side of the Flue Collar.
Blanking Plate
Fit the Flue Gasket and Blanking Plate on the remaining free outlet and
secure it, using 2 - M6 countersunk screws & nuts.
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Fire Bricks
The Fire Bricks, in this appliance, are factory fitted. The following set of photos show the
removal sequence that you will need to employ when servicing your Hunter stove.
Side Bricks
Remove all the
Riddling Bars, Cam
Bar, Catch Bar and
Ashpan. Take hold
of the front of the
Side Brick and pull
it forward and into
the Stove.
Rear Brick
Baffle Brick
Lift the Baffle Brick
and slide to the left.
When the right side
of the Brick clears
the Baffle Support,
lower the Brick into
the Fire Box and
remove.
To assemble these Fire Bricks, simply reverse the above procedure.
Pull the top edge of the
Rear Brick towards you,
lift and remove.
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Installation Instructions
These instructions cover the basic principles to ensure satisfactory installation of the stove,
although detail may need slight modification to suit particular local site conditions. In all
cases the installation must comply with current Building Regulations, Local Authority
Byelaws and other specifications or regulations as they affect the installation of the stove.
It should be noted that the Building Regulations requirements may be met by adopting the
relevant recommendations given in British Standards BS 8303, BS 6461 and BS 7566 as an
alternative means to achieve an equivalent level of performance to that obtained following
the guidance given in Approved Document J.
Health And Safety Precautions
Handling
Adequate facilities must be available for loading, unloading and site handling.
Fire Cement
Some types of fire cement are caustic and should not be allowed to come into contact with the
skin. In case of contact, wash immediately with plenty of water.
Asbestos
This stove contains no asbestos. If there is a possibility of disturbing any asbestos in the course
of installation then please seek specialist guidance and use appropriate protective equipment.
Metal Parts
When installing or servicing this stove, care should be taken to avoid the possibility of personal
injury.
Important Warning
This stove must not be installed into a chimney that serves any other heating appliance.
There must not be an extractor fan fitted in the same room as the stove as this can cause the stove
to emit fumes into the room.
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Installation
Chimney
The chimney height and the position of the chimney terminal should conform to Building
Regulations.
Check that the chimney is in good condition, dry, free from cracks and obstructions. The
diameter of the flue should not be less than 150mm and not more than 230mm. If any of these
requirements are not met, the chimney should be lined by a suitable method.
The chimney must be swept before connection to the stove.
Where the chimney is believed to have previously served an open fire installation, it is possible
that the higher flue gas temperature from the stove may loosen deposits that were previously
firmly adhered, with the consequent risk of flue blockage. It is therefore recommended that the
chimney be swept a second time within a month of regular use after installation.
If you have any doubts about the suitability of your chimney, consult your local dealer/stockist.
If there is no existing chimney then either a prefabricated block chimney in accordance with
Building Regulations Approved Document J, or a twin-walled insulated stainless steel flue to BS
4543 can be used. These chimneys must be fitted in accordance with the manufacturer’s
instructions and Building Regulations.
Flue Draught
A flue draught of minimum 1.2mm to a maximum 2.5mm water gauge is required for
satisfactory appliance performance. The flue draught should be checked under fire at high
output. If it exceeds the recommended maximum, a draught stabiliser must be fitted so that the
rate of burning can be controlled and to prevent over firing. If the reading is less than the
recommended minimum than the performance of the appliance will be compromised.
Connection to the Chimney
An existing fireplace opening can be bricked up or sealed with a register plate. A short length of
flue pipe of a minimum 152mm internal diameter may then be used to connect the stove to the
chimney. This flue pipe should be of 316 grade stainless steel or vitreous enamelled, nominal
thickness 1.2mm. Ensure that the pipe end is no closer than 76mm to the side or rear chimney
walls.
Ideally, the old fireplace should be filled in so that there is a smooth streamlined entry into the
flue way.
The length of any horizontal run of flue pipe must not exceed 152mm.
It is essential that all connections between the stove and chimney-flue are sealed and made
airtight.
Both the chimney and flue pipe must be accessible for cleaning and if ANY parts of the chimney
cannot be reached through the stove (with baffle brick removed), a soot door must be fitted in a
suitable position to enable this to be done.
Air Supply
The room or space containing this appliance needs a permanent, unobstructed air opening of at
least 550 mm2.
If a draught stabiliser is fitted, the air opening should be at least 3350 mm2. Due consideration
should be given to air requirements for any other appliances in the same room or space. Any air
opening must be kept clear from blockage or obstruction.
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Material Clearances
The stove can be recessed in a suitable sized fireplace but a permanent free air gap of at least
150mm must be left around the sides and top and at least 50mm at the back of the stove to obtain
maximum heat output and for access to the rear of the stove.
All non-combustible walls closer than 300mm to the stove should be at least 75mm thick.
In all instances the back wall of the fireplace recess and the hearth should be made of noncombustible material.
Allow an apron of a least 300mm at the front of the stove and 150mm on either side.
The hearth on which the stove is to be placed should not be less than 125mm thick and should be
in accordance with the current building regulations.
Care should be taken to level the stove using the adjusting screws in the feet.
The appliance shall be installed on a floor with adequate load-bearing capacity. If the existing
construction does not meet this prerequisite, suitable measures (e.g. load distributing plate)
should be taken to achieve it.
MINIMUM DISTANCE TO COMBUSTIBLE MATERIAL
Behind the stove 1100mm
At the side of the stove 700mm
There should be NO furniture placed within a distance of 900mm from any surface of the stove.
Note: combustible material refers to any material that will degrade when subjected to heat e.g.
plaster.
Note: walls and
hearth are non-
combustible and all
dimensions stated
are minimum
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Commissioning and Handover
Upon completion of the installation, allow a suitable period of time for any fire cement and
mortar to dry out. A small fire may then be lit and checked to ensure the smoke and fumes are
taken from the stove up the chimney and emitted safely to atmosphere. Do not run the stove at
full output for at least 24 hours.
On completion of the installation and commissioning, ensure that the operating instructions and
operating tools for the stove are left with the customer. Ensure to advise the customer on the
correct use of the appliance with the fuels likely to be used on the stove and warn them to use
only the recommended fuels for the stove.
Advise the user on what to do should smoke or fumes be emitted from the stove. The user
should be warned to use a fireguard to BS 6539 in the presence of children, aged and/or infirm
persons.
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secondary air controls.
Operating Instructions
This appliance is not suitable for use in a shared flue
This appliance should not be operated with the doors open
Aerosol Sprays
Do not use an aerosol spray on or near the stove when it is alight.
Air Controls
This stove has been designed to burn cleaner and more efficiently than a conventional wood
burning stove. If used correctly this stove will burn far more efficiently than normal with the
obvious notable feature of CLEAN GLASS.
However, for this product to work properly it must be used correctly.
It is essential that the stove has an adequate air supply for combustion and ventilation.
The primary, secondary and tertiary air inlets must be kept clear from obstruction and blockage.
Air Controls
Secondary Air Control (Open Right)
This Appliance will be hot when in operation and
due care should be taken. The riddling tool may
be used to operate the door handle. Thick gloves
could be used to operate the primary and
Primary Air Controls (Open Outwards)
Primary Air
The Sliders in each Door control the Primary air. This provides
a conventional air draught to the bed of the fire. The controls
are open when the Sliders are pushed towards the outside of the
Stove.
Secondary Air
Secondary air is controlled via the slider above the doors; it is
this “Airwash” that keeps a clean and uninterrupted view of the
fire.
Tertiary Air
Tertiary air aids in good secondary combustion of the fuel and
reducing emissions into the chimney and environment. Adjusting
the cover plate on the back of the Stove can control tertiary air.
Warning!
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Damper Assembly (Optional)
When burning wood, the flue damper assembly may be fitted. When the damper is set in the
open position the chimney draws at full draught, increasing the volume of airflow through the
stove and flue. Shutting the damper restricts the flow, slowing the rate of burning.
Warning! The flue damper must not be fitted when burning solid mineral fuel.
Multifuel Grate
Your Hunter Stove is fitted with a locomotive type grate. So that de-ashing can be carried out
cleanly and easily, it is riddled from the outside of the stove with the doors closed. The grate is
designed to burn both wood and solid fuels.
To burn wood, push the operating tool up and away from you.
When left in this position, air is restricted through the bed of the
fire providing a solid base to build up a bed of ash. Surplus ash
can be removed either by gentle riddling or with a shovel.
It might prove beneficial when burning more reactive fuels to leave
the grate in a “neutral” position, thus directing some under fire air
and some over fire air to the firebed.
To burn solid mineral fuels place the operating tool over the
riddling spigot and pull it down towards you. When left in that
position, air is directed under and up through the slots in the
firebed, giving the optimum conditions for burning solid fuels.
It is important that the riddling tool is used to remove the ash
to ensure airflow through the firebed and allow the fire to burn
over the entire area of the grate.
The ashpan should be emptied at least daily and ash should
never be allowed to build up over a period of time as this will
result in damage to the fire bars. The flat end of the riddling
tool can be used to carry the ashpan.
Notes on Wood burning
With a full load of wood, the stove will need to be refuelled
approximately once every hour.
Wood can be stacked higher in the stove than solid mineral
fuel but care must be taken that logs do not touch the brick baffle.
Wood burns most efficiently with the primary air sliders in the closed position and the secondary
control open. Moving the secondary control will control the burn rate of the stove.
Note - primary and secondary air is needed to light the stove, see section entitled ‘Lighting the
Stove’
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 for at least 12
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.
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Lighting the Stove
We recommend that you have two or three small fires before you operate your stove to its
maximum heat output. This is to allow the paint to cure in steadily and to give a long service life
of the paint finish. During this curing in process you may notice an unpleasant smell. It is nontoxic, but for your comfort we would suggest that during this period you leave all doors and
windows open.
First, load the fire with starting fuel, i.e. paper, dry sticks and/or firelighters in the mode chosen,
either wood or solid mineral fuel. Light the fire at the base leaving all air controls open. Allow
the fuel to reach a steady glow and build the fire up gradually. Once you have a good fire
established across the grate bed, further fuel can be added as required.
Extended Burning
The stove can be banked up for extended burning. When burning solid fuel, empty the ashpan.
Open air controls and let the fire burn brightly for a short period. Refuel and close both air
controls, the exact setting required will depend on the fuel used and the chimney draw so some
practice may be necessary. It may also be necessary to adjust the tertiary air cover plate on the
back of the stove. To revive the fire, open the air controls until the fire is burning brightly de-ash
if necessary and refuel. Set air controls as required.
Reduced Combustion
In order to reduce the rate of combustion, close the primary air controls and then close the
secondary air slider by moving the handle all the way to the left. If the controls are left in this
position, the fire will be starved of air and die down. If you want to revive the fire it is
recommended that the primary air control is open first, then open the secondary air slider.
Warning!- The stove will remain hot for a considerable time after the fire has been
extinguished.
Recommended Fuels
Anthracite is an approved natural smokeless fuel (not processed) and therefore can vary greatly
in quality and performance. It generally requires excellent air supply and above average fire-bed
temperatures to maintain maximum performance and with experience we would suggest that it is
used in conjunction with other approved manufactured smokeless fuels as per the HETAS
approved list.
Hunter Stoves recommend wood logs for use on this appliance.
Approval does not cover the use of other fuels either alone or mixed with the suitable fuels listed
above, nor does it cover instructions for the use of other fuels.
Only authorised smokeless fuels may be used in smoke control areas.
Warning!- Petroleum coke fuels or household waste must not be burnt on this appliance.
Should any difficulties arise over fuel quality or suitability, consult your local approved coal
merchant or:
HETAS Ltd.– Telephone 01242 673257 – www.hetas.co.uk
Solid Fuel Association – Telephone 0800 600 000 – www.solidfuel.co.uk
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Safety notes for your guidance
FIRES CAN BE DANGEROUS – Always use a fireguard in the presence of children, the
elderly or the infirm. The fireguard should be manufactured in accordance with BS 6539 –
Fireguards for use with solid fuel appliances.
DO NOT OVERFIRE – it is possible to fire the stove beyond its design capacity, this could
damage the stove, so watch for signs of overfiring – if any part of the stove starts to glow red, the
fire is in an overfire situation and the controls should be adjusted accordingly. Never leave the
stove unattended for long periods without first adjusting the controls to a safe setting – careful air
supply control should be exercised at all times.
WARNING – FUME EMISSION
Properly installed and operated, this appliance will not emit fumes. Occasional fumes from deashing and refuelling may occur. Persistent fume emission must not be tolerated.
If fume emission does persist, then the following immediate action should be taken: -
1. Open doors and windows to ventilate room.
2. Let the fire out, or eject and safely dispose of fuel from the appliance.
3. Check for flue chimney blockage and clean if required.
4. Do not attempt to re-light the fire until the cause has been identified and corrected.
If necessary, seek professional advice.
Adverse weather – In a small number of installations, occasional local weather conditions (e.g.
wind from a particular direction) may cause downdraught in the flue and cause the stove to emit
fumes. In these circumstances, the stove should not be used. A professional flue installer will be
able to advise on solutions to this problem (e.g. anti-downdraught cowl).
Important! – Do not fit an extractor fan in the same room as this appliance.
IN THE EVENT OF A CHIMNEY FIRE
• Raise the alarm to let others in the house know.
• Call the Fire Brigade.
• Reduce the appliance-burning rate by closing all air controls.
• Move furniture and rugs away from the fireplace and remove any nearby ornaments.
• Place a fireguard or spark guard in front of the stove.
• Feel the chimneybreast for signs of excessive heat.
If the wall is becoming hot, move the furniture away. Ensure that the Fire Brigade can gain
access to your roof space in order to check this area for signs of fire spread.
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GENERAL MAINTENANCE
NO unauthorised modification of this appliance should be carried out.
This appliance requires regular maintenance by a competent engineer.
Brick Baffle
This should be removed and cleaned at least once a month to prevent any build up of soot or fly
ash that could lead to blocked flue ways and dangerous fume emission.
If the baffle brick is removed the chimney/flue way can be swept through the appliance.
Stove Body
The stove is finished with a heat resistant paint and this can be cleaned with a soft brush. Do not
clean whilst the stove is hot; wait until it has cooled down. The finish can be renovated with
Hunter stove paint.
Glass Panels
Clean the glass panels when cool with a Hunter glass cleaner. Highly abrasive substances should
be avoided as these can scratch the glass and make subsequent cleaning more difficult. Wet logs
on heated glass, a badly aimed poker or heavy slamming of the doors could crack the glass
panels. The glass will not fracture from heat.
Firebricks
In normal use, these can last for many years. It is possible however, to crack them if logs are
continually jammed against them or if they are frequently struck with a poker.
Check periodically for seriously cracked bricks, which can be replaced with new; available from
your dealer.
Door Catch
Should the door catch require adjustment, to maintain the door seal, it is adjustable. By
slackening the internal locking nut and turning the catch bolt one turn towards the door you will
achieve a tighter lock when the door is closed.
Rope
Check the rope around the door and glass. If rope is becoming detached, use Hunter Stoves rope
glue to reattach it. If the rope is in a poor condition, a replacement rope kit may be ordered from
the Hunter Stoves spares range.
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Chimney and Flue ways
It is important that the chimney, flue ways and any connecting flue pipe are swept regularly.
This means at least once a year for smokeless fuels and at least twice a year for wood and other
fuels. The baffle brick will need to be removed from its supports in order to sweep the chimney
(see assembly instructions).
Only wire-centred sweeps’ brushes fitted with a guide wheel should be used.
If it is not possible to sweep all parts of the chimney through the appliance, ensure there is
adequate access to cleaning doors.
If the stove is fitted in place of an open fire, then the chimney should be swept one month after
installation to clear any soot falls which may have occurred due to the difference in combustion
between the stove and the open fire.
Seasonal Use - if the appliance has been unused for a long period of time, such as during the
spring and summer months, a competent person should check the chimney for potential
obstructions before lighting the stove.
Gaskets
All gasket used on this appliance are produced from a heat resistant material called Manniglas.
The glass gasket will have to be replaced when a new piece of glass is fitted as the gaskets
become brittle after firing the stove. Over time, you may also find, that the gasket changes
colour. This is due to a reduction in the pigment used in the manufacture of the product and no
cause for concern.
Troubleshooting
Fire will not burn
Check that:
1. The air inlet is not obstructed in any way.
2. Chimneys and flue ways are clear.
3. A suitable fuel is being used.
4. There is an adequate air supply into the room.
5. An extractor fan is not fitted in the same room as the stove.
6. Flue draught is above minimum level (see installation instructions).
Fire blazing out of control
Check that:
1. The doors are tightly closed.
2. The air controls are all in the closed position.
3. The Primary air control flap is not wedged in the open position.
4. A suitable fuel is being used.
5. The glass retaining clips are not loose.
6. The door rope seals are in good condition
7. Flue draught is below maximum level (see installation instructions).
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RIGHT HAND DOOR
Door Glass
Right Hand Door
Left Hand Door
Door Glass
(HHR08/082)
Glass Gasket
(HHR08/081)
Door Knob (HCR06/059)
M8 Full Nut (FNFN08)
Catch Shaft (HHR08/111)
Circlip (FLRX07)
M8 Full Nut (FNFN08)
Catch (HMSS04/037)
STOVE SPARES
(HHR08/084)
Glass Clip
(HHR08/046)
Glass Clip Screw
(FSJM05008SS)
Door Slider (HHR08/119)
Slider Knob (HHR08/045)
LEFT HAND DOOR
(HHR08/079)
(HHR08/082)
Glass Gasket
(HHR08/081)
Glass Clip
(HHR08/046)
Glass Clip Screw
(FSJM05008SS)
Door Slider (HHR08/119)
Slider Knob (HHR08/045)
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