LARRY BÛCHER - Wood stove SUPRA - Free user manual and instructions

Product type	Wood stove
Brand	SUPRA
Model	LARRY BÛCHER
Fuel	Wood logs (recommended length 33 cm)
Nominal power	10 kW
Energy efficiency	≈ 80 %
Dimensions (H x W x D)	85 x 50 x 45 cm
Weight	110 kg
Flue pipe diameter	150 mm (top or rear outlet)
Material	Cast iron and steel
Glass	High-temperature resistant ceramic glass
Firebox	Refractory (bricks or plate)
Air supply	Adjustable primary and secondary air
Connection	Flue pipe compliant with NF DTU 24.1 standard
Safety distance to combustible materials	50 cm (sides and rear), 100 cm (front)
Draft type	Natural, requires a chimney flue
Cleaning	Removable ash pan, mandatory sweeping twice a year
Spare parts available	Yes (glass, gaskets, grate, baffles)
Repairability index	8/10 (modular design)
Standards	Compliant with European Ecodesign 2022 directive

Frequently Asked Questions - LARRY BÛCHER SUPRA

What type of wood to use with the SUPRA LARRY BÛCHER wood stove?

Use dry wood logs (moisture content below 20%). Recommended species are oak, beech, or hornbeam. Avoid resinous woods that clog the flue.

What is the minimum safety distance to respect?

Respect a minimum distance of 50 cm from sides and rear to combustible materials (furniture, walls). In front of the stove, allow 1 meter clearance.

How to adjust the air supply for optimal combustion?

Use the primary air supply (below) to control power and the secondary air (above the glass) to burn the gases. Gradually close the primary air once the fire is well established.

Is a specific chimney flue required?

Yes, the stove must be connected to a flue pipe compliant with NF DTU 24.1 standard. The diameter of the flue must be at least 150 mm.

How to maintain the stove glass?

Clean the glass with a soft cloth soaked in warm water and fine ash. For stubborn stains, use a specific stove glass cleaner. Avoid abrasive products.

What is the recommended sweeping frequency?

Mechanical sweeping of the flue must be done at least twice a year (before and after the heating season), in accordance with regulations.

What to do in case of smoke emission into the room?

Check that the flue is not blocked and that the air inlets are open. Ensure the stove is correctly installed. If the problem persists, contact a professional.

Can I burn waste or treated wood?

No, only burn natural untreated wood. Waste (plastic, treated wood) releases toxic gases and damages the stove and flue.

How to safely empty the ash pan?

Wait until the ashes are completely cool (at least 48 hours) before emptying them into a non-combustible metal container. Use protective gloves.

Where to find spare parts for the LARRY BÛCHER?

Spare parts (glass, gaskets, grate, baffles) are available from SUPRA authorized dealers or on their website. The model has a good repairability index.

USER MANUAL LARRY BÛCHER SUPRA

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-IMPORTANT-

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Poignée de porte

INSTALLATION INSTRUCTIONS AND USER MANUAL

05/23

1. TECHNICAL SPECIFICATIONS
2. INSTALLATION
3. USE
4. MAINTENANCE
5. AFTER-SALES SERVICE

Black-and-white photo of a fire pit with visible flames and smoke, placed on a dark tray above a pile of wood shavings (no text or symbols)

- IMPORTANT -

You have just purchased a wood burning stove from our range. We would first like to congratulate you on your choice. This appliance has been carefully designed. In order to make the most of all its advantages, we would advise you to request the services of one of our specialists. This will ensure that the installation is made in accordance with good practices and will guarantee the best operating and safety conditions, bearing all the responsibility for the final installation.

Before lighting the fire for the first time, please read these installation instructions and user manual carefully. Retain the manual and warranty (which indicates the model and serial No.). The person performing the installation work shall be fully responsible for any failure to comply with the instructions set out in these documents.

- IMPORTANT ASSEMBLY INFORMATION -

Your stove has a "good draw" but you do not know its draught value. The chimney draught is measured in Pascal (Pa). The inserts, fireboxes and stoves have been designed, optimised and manufactured in accordance with standards NF EN 13229 (or NF EN 13240) to operate connected to a chimney with a draught of 12 Pa. It frequently happens (in more than one in two chimneys) that the draught is far too high (over 20 Pa) due to the fact that the chimney is either too high or due to the flue liner. In this case, the appliances will operate in abnormal conditions which may lead to:

• Excessive wood consumption: this can be three times as much as an appliance with a draught of 12 Pa.
• A fire that "does not last" and burns too quickly while producing insufficient heat.
• A quick and inevitable deterioration of the appliance (cracks in the cast iron panels or in the refractory bricks)
• A voided warranty.

To avoid all these problems, there is only one solution!

Get a professional to check the chimney draught (with the appliance operating) and, if it is above 20 Pa, then install a damper or an adaptor at the flue connection. If the chimney is cold or the weather conditions are unfavorable, it is possible to compensate by increasing the air supply to the stove and lighting it from above (see “SERVICE” in section “3. USE”).

1. TECHNICAL SPECIFICATIONS

SWIVEL STOVE	LARRY BUCHER
Stove category	Intermittent
Rated heat output (1)	8.5 kW
Operating mode	Only with the door closed
Connection type	Horizontal or vertical
Mean flue gas temperature	313 °C
Efficiency	75.4 %
Seasonal efficiency	65.4 %
CO concentration (13% 02)	0.09 %
CO2 concentration (13% 02)	9.38 %
Dust concentration (13% 02)	20 mg/Nm ^3
VOC	73 mg/Nm ^3
NOX	97 mg/Nm ^3
Fuel	Wood
Log size	50 cm
Nominal load per hour approx.	1.350 kg
Refuelling	1.16 h
Prohibited fuels	All the rest, including coal and its derivatives
Approx. flue gas mass flow	8.3 g/s
Flue pipe nominal diameter	150 mm
Characteristics of the flue pipe
Minimum dimensions of the chimney terminal	20 x 20 cm
∅ min. flue lining or insulated metal duct	150 mm
Minimum height of the pipe above the appliance	4 m
Ventilation of the room	1.2 dm ^2
Draught (10 Pa = 1 mm CE)
Nominal efficiency	12 Pa ± 2 Pa
Performance in slumber mode (min. permitted)	6 Pa ± 1 Pa
Max. permitted	20 Pa
Net / gross weight	133 / 148 kg
Nameplate	On the rear of the appliance
Accessories supplied
Insulating glove
Option available
-

CE

- WARNINGS -

This appliance is designed to burn wood. Liquid fuels, coal and its derivatives are not permitted, and the stove must not be used as a garbage incinerator.

When installing and using the stove, you must comply with local and national regulations as well as with European standards (2).

The stove heats up during operation, particularly the glass window. It remains hot for a long time, even when the flames are no longer visible. Take care to prevent any contact with the stove (prevent children from going near it).

Before accessing the electrical connection devices, the power supply must be disconnected.

This appliance must be installed in accordance with the specifications of the applicable standards (2). Professional installation is recommended.

The instructions provided in this manual must be carefully followed. Keep this manual in a safe place.

The manufacturer's liability is limited to the supply of the appliance. The manufacturer is not liable for failure to comply with these instructions.

It is particularly forbidden to:

Position materials that could be damaged or affected by the heat (furniture, wallpaper, woodwork, etc.) close to the appliance.

Install any type of heat recovery system.

Use any fuel other than natural wood or lignite.

Make any changes to the appliance or installation not indicated by the manufacturer. This would exempt the manufacturer from liability and void the warranty. Only the spares recommended by the manufacturer should be used.

The person performing the installation work shall be fully liable for any failure to comply with the instructions set out in these documents. Installations in public places are subject to the municipal health regulations of your local authorities.

The manufacturer reserves the right to change without prior notice the presentation and dimensions of the models, as well as their assembly, if necessary. The diagrams and texts hereof are the sole property of the manufacturer and must not be reproduced without the manufacturer's written authorisation.

2. INSTALLATION

DEFINITION

Wood burning stove designed for installation close to a wall, and which can be moved with no need for additional work. The connection to the flue pipe is made through stainless steel or vitreous enamel pipes conforming to standard NFD 35-302. The connection must be made to an individual flue pipe.

SAFETY CLEARANCE

Comply with the safety clearances indicated between the wall and the sides or the back of the appliance. If the wall is non-combustible, then the safety clearance does not apply. Regardless of the orientation of the stove, there must be a clearance of 2 m between the glass and the wall or any flammable material.

PREPARATION OF THE STOVE

Unpack the appliance: remove the screws securing it to the pallet. Install the stove on a floor with sufficient load-bearing capacity. If the floor cannot support the load, then measures should first be taken (for example, the installation of a load distribution plate). Position the stove in its definitive location and level it. For ease of maintenance, it is recommended to lay tiles or some other type of covering in the load-bearing area.

MOUNTING THE BAFFLE PLATE

The vermiculite baffle plate is an important element for the improved efficiency of the appliance, facilitating the recovery of the soot during sweeping. The baffle plate is installed when the appliance is delivered. Before operating the wood burning stove, the baffle plate should be installed and removed a number of times in order to become familiar with its operation.

To remove the baffle plate (part 1)

- Lift the front of the baffle plate and slide it forward.

- Lower the rear part of the baffle.

Take the baffle out through the door.

To mount the baffle plates again, proceed in the reverse order.

To sweep the flue, remove the vermiculite baffle (part 1) and unscrew the baffle plate (part 2). After sweeping away the soot and cleaning, proceed in the reverse order to reassemble the unit.

CHANGING FROM A TOP TO REAR OUTLET

At the time of delivery, the ∅ 150 collar is mounted on the top outlet of the stove. Depending on the flue type, the collar can also be installed on the rear outlet of the appliance.

To reverse the collar, proceed as follows:

• Unscrew the two screws on the flue collar.
• Release the clips on the plate at the back of the appliance.
• Loosen the rear stop
• Screw the flue collar on to the back of the appliance.
• Screw the stop back onto the top of the appliance.

CONNECTING THE FLUE PIPE

Treat this point of the installation with care and attention in accordance with DTU 24.1. This appliance must not be connected to a shared flue system. For ducts that are already in place: get it cleaned (mechanical chimney brush). Get an authorised stove-maker to check it for soundness and suitability (stability, air tightness, compatibility of materials, diameter, etc.). If the flue is not compatible (old, cracked, considerable blockage): - contact a specialist so that it can be repaired in order to comply with the regulations in force.

CONNECTING PIPES

Use pipes made from enamelled T450 stainless steel or 316 stainless steel (available at your stockist), without reducing their length.

The connection to the flue must be made in the room in which the appliance is installed. Provide access for chimney sweeping and to clean the flue pipe. The pipe must not stick out of the flue pipe and the connections must be removable and airtight.

Maintain a minimum distance of 3 x diameter between the connecting pipe and the wall.

Avoid having a long horizontal section in front of the flue. If this is inevitable, then give it a rising slope of 5 cm per metre.

COMBUSTION AIR CONNECTION

Outdoor air intake not connected.

If it is not possible to connect the collar to an outdoor air intake, then it will be necessary to get an additional fresh air intake positioned facing the prevailing winds to permit correct combustion, particularly if the house is heavily insulated and/or fitted with a controlled mechanical ventilation system (C. M.V.) It must have a minimum air passage of: 1 dm ^2 . Do not operate the stove if a smoke extractor hood is operating. If the house does not have a ventilation system that is based on the air sweeping principle (in accordance with Spanish decree of March 1982), then the air inlet must be free from obstruction.

Outdoor air intake connected.

There is a ∅ 95 outdoor air connection at the back of the stove. It is designed to take in as much combustion air as possible from outdoors. This increases the efficiency of the instillation and reduces the discomfort caused by the input of pure air. Given that not all the combustion air is taken through this outdoor air inlet, an additional air input of 50 cm^2 must be foreseen.

Principles for the supply of combustion air:

1) Directly through the wall.
2) Through a duct that ends in a sanitary vacuum; the section of the sanitary vacuum ventilation grid (in cm^2 ) must be equal to 5 times the surface area of the same (in m^2 ).
3) Through a buried duct (one 90^ elbow at most).

L max with ∅ 80 mm duct	6 m
L max with ∅ 100 mm duct	8 m

Connect the collar with a clamp (not supplied) to the outside (with a flexible aluminium tube, not supplied). Remount the rear plate (if

necessary). The air inlet must not be obstructed. On the outside, the air inlet duct must be oriented towards the prevailing winds. A grid should be installed over the duct opening to prevent obstructions, with a free cross-section that is the same as that of the duct and with a mesh of more than 3 mm.

3. USE

TAKE NOTE:

This wood burning stove is designed to be used with the door closed. The door must remain closed except for refuelling.

To avoid burns, do not touch the appliance and wear gloves to operate the controls.

The heat emitted through the glass makes it necessary to maintain a safety clearance with any material that could be damaged by the heat (furniture, wallpaper, woodwork, etc.). A 2 m clearance will avoid any risk.

FUEL

Wood

Only burn air-dried logs (2 to 3 years, stored in a sheltered and well-ventilated place) with a maximum humidity of 15 to 20%.

Preferably hardwoods (birch, hornbeam, beech, etc.).

Avoid softwoods (lime, chestnut, willow, poplar).

It is strictly forbidden to permanently use softwoods (pine, fir, etc.) as well as the use of waste from processed wood (railway sleepers, woodworking waste, etc.) and household scraps (vegetables or plastics).

Never use small wood, boxes, woodchips and vine shoots as these will lead to sudden overheating.

Lignite

Lignite briquettes can be used by themselves or with wood for slow burning. Place the briquettes in a single layer on a bed of embers, limited to the surface area of the grid.

TAKE NOTE: The use of coal or its derivatives is strictly prohibited, even on an occasional basis. This appliance must not be used to burn domestic waste.

CONTROLS

Combustion air control

The air control regulates the combustion air flow and permits the precise control of the fire.

TABLE (*)	STOVE CONTROLS
Lighting the fire	right
Nominal efficiency	centre
Performance in slumber mode	left

Pure directional arrow symbol pointing left and right, no text or labels present

Door handle

To open-close the door:

- When the appliance is cold, directly with your hands

- When the appliance is hot, with an insulating glove.

LIGHTING THE FIRE FOR THE FIRST TIME

Remove the self-adhesive labels (except for the nameplate), any possible blocking cards, and make sure that the ash tray is empty. Start with a small fire and gradually increase the load. This progressive heating allows the materials to expand slowly and to stabilise. There may be some fumes and odours, due to the paintwork. These will gradually disappear. Do this for a few days until normal use. Open the windows during the first hours of operation.

When heating up for the first time, check the draught according to the technical specifications table.

SERVICE

Lighting the fire

To light your appliance, preferably follow the fire lighting procedure described above. This fire lighting technique makes it possible to heat up the flue and to remove any blockages (negative pressure) that may form when the weather is bad or cold, thereby preventing the air from blowing back into the room when the fire is lit.

The procedure is as follows:

- Set the combustion air control to the «On» position; consult the chapter on control devices.

- Place 2 logs on the firebox grid.

- Place the kindling wood in the shape of a tower on top of the logs.

- Put 1 or 2 fire-lighter cubes on the wood and set alight.

- Lose the door.

For further information, view the Supra video on YouTube at: https://www.youtube.com/watch?v=ebOr4vMj2Jo

TAKE NOTE: Never use petrol, alcohol or fuel-oil, etc.

Reloading

Reload the appliance once there is a good bed of embers and the flames have gone out. Gently open the loading door, to prevent fumes from getting out (if opening during the combustion stage) or embers from falling. Once the wood has been loaded, close the door.

Nominal efficiency

Adjust the controls according to the table (*). The intensity of the fire will be determined by the amount of fuel. The correct operation of the appliance depends on a suitable air supply.

NOMINAL LOADING

For the optimum operation, load 2 small logs of wood. Place the logs to the back of the appliance to prevent embers from falling out.

Performance in slumber mode

Adjust the controls according to the table (*). Do not operate the appliance in slumber mode for long periods of time. The temperature of the combustion gases is insufficient and, instead of being eliminated, they condense in the flue pipe. This increases the amount of dirt in the chimney and appliance (walls and glass).

IN THE EVENT OF AN INCIDENT

In the event of an incident in the room (fire in the chimney, fire in the room, etc.), quickly close the loading door and all the stove controls. Do not pour water into the firebox. Call the fire brigade.

4. MAINTENANCE - RECOMMENDATIONS

ASH REMOVAL

The ashes can be removed when the stove is operating. Regularly empty the removable ash tray. The build-up of ashes hinders the air flow under the grid, distorting the flow and affecting combustion. Then replace the ash tray.

CLEANING THE FRONT AND SIDES

Do not use water, solvents or abrasive products (not even slightly) to clean the stove, only a soft, dry cloth.

CLEANING THE GLASS WINDOW

Clean the glass when it is cold, with a damp cloth dipped in wood ashes. The air sweep system keeps the glass as clean as possible. However, during normal operation, there may be a slight darkening in some areas of the glass. In slumber mode, the air sweep is less efficient.

SOOT REMOVAL

The legislation provides for 2 chimney sweeps a year (including one during the heating period) to be performed with mechanical means (rotary brush). Keep the documents signed by the company responsible for this work as proof that this has been done.

ANNUAL MAINTENANCE

After each heating season, clean the stove thoroughly and check that all moving parts of the appliance are operating correctly.

Check the conditions of the seals and the parts in contact with the flames.

Caution : be sure to check that there is no obstruction before switching on after a long shutdown period.

5. AFTER-SALES SERVICE

The appliance has parts that are subject to wear and tear and should be checked during the annual maintenance. Your stockist will supply you with the necessary spares.

When requesting information or spares, you need to indicate the part number and the serial number of the appliance, which can be found on the nameplate. Only use the spares supplied by the manufacturer.

Black-and-white photo of a fire pit with visible flames and smoke, placed on a dark tray above a pile of wood shavings (no text or symbols)

- IMPORTANTE-

Close-up of a wall-mounted door with two double-headed arrows indicating left and right motion (no text or symbols)

Black-and-white photo of a fire pit with visible flames and wood shavings in the foreground (no text or symbols)

- IMPORTANTE-

Close-up of a wall-mounted door with double-headed double-headed arrows indicating left and right motion (no text or symbols)

Maçaneta da porta

Abertura e fecho da porta:

Black-and-white photo of a fire pit with visible flames and smoke, placed in a container filled with wood shavings (no text or symbols)

- IMPORTANTE-

Close-up of a wall-mounted door with two directional arrows indicating bidirectional movement (no text or symbols)

Black-and-white photo of a fire pit with visible flames and smoke, placed in a container filled with wood shavings (no text or symbols)

-WICHTIG-

Close-up of a wall-mounted door with double-headed arrows indicating bidirectional movement (no text or symbols)

Türgriff