Hunter Stoves Herald 8 Double-Double CE User manual

D O U B L E /
D O U B L E /D O U B L E /
D O U B L E / D O U B L E
D O U B L ED O U B L E
D O U B L E
H
HH
H E R A L D
E R A L D E R A L D
E R A L D 8
88
8
C E
C EC E
C E
M U L T I F U E L
M U L T I F U E L M U L T I F U E L
M U L T I F U E L
C L E A N B U R N
C L E A N B U R N C L E A N B U R N
C L E A N B U R N
S T O V E
S T O V ES T O V E
S T O V E
Installation and Operating Instructions
An accredited competent person must carry out the installation of this appliance;
alternatively, your local Building Control Officer can approve the completed
installation, should a non-accredited 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.
v09.09

Herald 8 Double-Double CE
Technical Specification
Stove Mass 240 kg
Wood
Total Efficiency 79.0%
Nominal Heat Output 11 KW
Mean CO Emission (at 13% O2) 0.36 %
Mean Flue Gas Temperature 309 °C
Flue Gas Mass Flow 7.5 g/s
This appliance is not suitable for use in a shared flue
This appliance is suitable for intermittent burning

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.
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.
Flue Collar
Place the Flue Gasket on the Top Plate Flue Exit. 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.

Fire Bricks
The Fire Bricks, in this appliance, are factory fitted. The follo ing set of photos sho the removal sequence
that you ill need to employ hen servicing your Hunter Stove.
Side Bricks
Baffle
To assemble, simply reverse the above procedure.
Remove the outer 3 Riddling Bars (each side),
Slide out the Side Bricks from base, into the
Stove.
Remove the Location Pins from Turbo
Bar. Slide it to the left. Once clear of the
R.H. Turbo Duct pull it towards you and
out of the L.H. Turbo Duct.
Pull the Baffle forward slightly and slide
to the left.
When the right side of the Baffle clears
the Baffle Support, lower it into the Fire
Box and remove.

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.
Competent Persons Scheme
Members of the following schemes may self-certify the installation of this stove. If the installer is not a
member of one of these schemes, your local building control department must approve the installation.
Scheme
Web address
Telephone
APHC (Association of Plumbing and Heating
Contractors (Certification) Limited www.aphc.co.uk
02476 470 626
Building Engineering Services Competence
Accreditation (BESCA Limited)
www.hvca.org.uk /
www.besca.org.uk 0800 652 5533
HETAS Ltd (Heating Equipment Testing and
Approval Scheme) www.hetas.co.uk
01462 634721
NAPIT Registration Ltd www.napit.org.uk 0870 444 1392
NICEIC Group Ltd www.niceic.org.uk 0800 013 0900
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.

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 152mm and not more than 200mm. 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, then 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
3520 mm
2
.
If a draught stabiliser is fitted, the air opening should be at least 6940 mm
2
. Due consideration should
be given to air requirements for any other appliances in the same room or space.

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 to obtain maximum heat output.
All non-combustible walls closer than 300mm to the stove should be at least 75mm thick.
Allow an apron of a least 300mm at the fronts 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
At the side of the stove 400mm
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.
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. 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.
125mm
150 mm
300mm
75mm
Note: walls and hearth
are non-combustible and
all dimensions stated are
minimum

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.
Primary Air
Primary air is controlled via the sliders in the doors.
This provides a conventional air draught to the bed of the fire.
Secondary Air
Secondary air is controlled via the sliders 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 plates on the base of the stove can control tertiary air.
Damper Assembly (Optional)
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.
Close all other air controls and allow the fire to die down before closing the damper.
Warning!
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 secondary air controls.

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.
To burn wood, push the operating tool up and away from you so that the
front faces of the riddling Bars are inline. 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.
Notes on Wood burning
With a full load of wood, the stove will need to be refuelled approximately once every 1.5 hours.
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 valve lever in the open position and the secondary
control partially 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.
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 non-toxic, 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.
Reduced Combustion
In order to reduce the rate of combustion, close the primary air sliders, 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 will go out. 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
Hunter Stoves recommend that wood logs be burnt in this appliance.
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 [phone] – .hetas.co.uk
Solid Fuel Association – Telephone [phone] – .solidfuel.co.uk
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 over firing – if any part of the stove starts to glow red, the fire is in an over
fire 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 de-ashing
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.

GENERAL MAINTENANCE
NO unauthorised modification of this appliance should be carried out.
This appliance requires regular maintenance by a competent engineer.
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 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
locking nut and turning the door handle one turn clockwise, 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.

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).

STOVE SPARES
Only Hunter Stoves authorised spares should be used with this stove
RIGHT HAND DOOR
LEFT HAND DOOR
Door Knob (HCR06/059)
M8 Full Nut (FNFN08)
Catch Shaft (HHR08/111)
Circlip (FLRX07)
M8 Full Nut (FNFN08)
Catch (HMSS04/037)
Glass Clip
(HHR08/046)
Glass Clip Screw
(FSJM05008SS)
Door Glass
(HHR08/082)
Glass Gasket
(HHR08/081)
Right Hand Door
(HHR08/084)
Door Slider (HHR08/119)
Slider Knob (HHR08/045)
Left Hand Door
(HHR08/079)
Glass Clip
(HHR08/046)
Glass Clip Screw
(FSJM05008SS)
Door Slider (HHR08/119)
Slider Knob (HHR08/045)
Door Glass
(HHR08/082)
Glass Gasket
(HHR08/081)

STOVE BODY ASSEMBLY – PART SECTION - MULTIFUEL Flue Collar
(CH08/030)
Flue Gasket
(CH08/032)
Side Bricks
(HHR08DD/024)
Ashpans
(HH0R8/032)
Catch Bar
(HHR08/083)
Riddling Bar - Upper
(HHR08/030)
Riddling Bar - Lower
(HHR08/029)
Cam Bar
(HHR08/008)
STOVE BODY ASSEMBLY – PART SECTION - WOOD
Log & Catch Bars
(HHR08/112)
Top Air Control
Slider
(HHR14/069)
Slider Plate
(HHR14/070)
Gasket
(HHR14/071)
Deflector
(HHR14/072)
Slider Shaft
(HHR14/073)
Slider Knob
(HHR08/045)
Turbo Bar
(HHR08DD/025)
Turbo Bar Pin
(Not Shown)
(HCR06DD/024)
Baffle
(HHR08DD/030)
Side Bricks
(HHR08DD/024)
Side Plates
(HHR08DD/029)
Side Plates
(HHR08DD/029)
Riddling Supports
(HHR08/058)