Bull Pizza Oven Installation, Operation, & Maintenance Manual

Introduction

The Bull Pizza Oven, specifically the 'BULL HORNO PIZZA LEÑA L', is presented as an ideal professional tool for efficiently and deliciously baking pizzas, boasting the robustness and quality of 304 stainless steel.

Safety Instructions

All work must be carried out under conditions of safety with the gas line shut off and/or disconnected. Improper connection, alterations, or improper maintenance can cause material damage, injury, or death. Read instructions carefully before installation and use.

Key Safety Points:

• The identification plate must not be removed.
• Remove all protective films before operation.
• Avoid steel sponges and sharp scrapers; use non-abrasive products and soft cloths.
• Do not use plastic tableware or containers as high temperatures can melt them.
• Use cutlery and tools resistant to high temperatures.
• Place the oven on a flat, stable surface.
• Oven surfaces may change color due to high temperatures.
• Ensure easy access for cleaning.
• Never put flammable objects in the oven.
• Do not allow children near the appliance during operation.
• External surfaces may overheat; position away from heat-sensitive objects.
• Do not place flammable materials in front of the oven or on trolley shelves.
• Manoeuvre the door by the handle; avoid touching external surfaces or the flue.
• Do not use flammable liquids near the oven.
• Keep electrical cables and fuel supply pipes away from hot surfaces.
• Do not use the oven if it malfunctions or is suspected to be broken.
• Do not move the oven while in use or when hot.
• Do not lean or place objects inside the oven, as stability may be compromised.
• Do not use naked flames near the oven.
• In case of grease fire, stop the power supply and leave the door closed until the fire extinguishes.
• Wear heat-resistant gloves when using the oven.
• Parts sealed by the manufacturer must not be modified.
• Do not leave the appliance unattended during cooking, as fats and oils can catch fire.
• Do not obstruct ventilation or heat disposal slots.
• For ovens with integrated bases (trolleys), lock the wheels using the brake.
• Your wood-fired oven is designed for outdoor use; ensure good ventilation if installed indoors to prevent carbon monoxide risk.
• Always place the oven on a flat surface, out of strong winds.
• Never move the oven while operating.
• Observe minimum distances from combustible materials and ensure correct installation.
• Do not deposit or use gasoline or flammable vapors/liquids near the appliance. Keep the area around the appliance free from combustible materials.
• GAS LEAKS MAY CAUSE FIRE OR EXPLOSION AND CAUSE SERIOUS OR FATAL PERSONAL INJURY, OR PROPERTY DAMAGE.
• CAUTION IF YOU SMELL GAS: Immediately shut off the gas supply, extinguish any open flames, open the oven door, and contact a specialist technician.
• When the gas oven is not in use, shut off the gas supply valve and do not store unused gas cylinders nearby.

Installation Instructions

Oven exterior walls can reach temperatures above 50°C (120°F); keep flammable materials at least 1 meter away.

Place the oven at a sufficient distance from flammable materials or materials that may be damaged by heat. Protect the oven from wind or strong air currents that may alter its performance.

Ensure the oven is placed on a flat, stable surface. Accidental movement during use can be dangerous.

Free-standing ovens must be positioned on tables or other fire-resistant surfaces with adequate load-bearing capacity. Adjust feet to level the oven.

For easier handling, it is recommended to remove the chimney, door, and internal tiles before positioning.

LPG Connection (Liquid Propane Gas):

• Connect the LP cylinder to the oven using a suitable flexible rubber hose (60-150 cm).
• The oven inlet connection has a G1/2" F thread. Use a specific adapter for LPG cylinders according to destination country regulations.
• Ensure the hose is tightened with a clamp to avoid accidental losses.
• The cylinder must have a fixed calibration pressure regulator suitable for the gas type and country.
• Avoid twisting, bending, or crushing the hose. Replace if signs of wear or expired date are present.
• Pressure Regulator (Not Supplied): Must comply with local/national standards with a nominal pressure output of: Category I3+(28-30/37) Propane 37 mbar, Butane 28-30 mbar; Category I3B/P (30) Propane/Butane 30 mbar; Category I3B/P (37) Propane/Butane 37 mbar; Category I3B/P (50) Propane/Butane 50 mbar. Never use an unregulated gas source.
• Hose (Not Supplied): Inlet pipe must not be less than: ؽ" = Ø14 mm for Natural Gas; ؾ" = Ø 8 mm for LPG (Max. length 1.5 meters).
• LPG CYLINDER: Recommend using cylinders weighing no more than 10 kg for under-oven trolleys. Max. permissible gas pipe length is 1.5 m. Handle cylinders with care; never place horizontally as the valve may be damaged. Always use the cylinder upright. When positioned horizontally, combustible liquid may reach hoses, creating an explosion hazard. Place cylinders in an accessible location. Do not subject cylinders to heat. Do not store cylinders in homes, basements, or cellars. Propane gas is heavier than air and can accumulate at the lowest level. Do not store spare or empty cylinders near the appliance.

NG Connection (Natural Gas):

• Ovens can be fitted for natural gas on request. Conversion involves fitting calibrated nozzles and minimum adjustment specific to the gas category.
• Connection to a domestic natural gas line must be carried out according to local regulations by qualified personnel.
• The gas line upstream of the oven must have a mandatory on/off shut-off valve.
• Connection can be made using rigid tubing or flexible hoses. The inlet thread is G1/2” F with gasket seal. Replace the gasket each time the inlet pipe is replaced or after extended periods of non-use.
• Always perform a leak test on new connections or after replacing pipes or gaskets.

Maintenance

When the oven is cold or before each use, remove food residue from the hob. Clean the area around the burner with a vacuum cleaner to avoid malfunctions. Keep external parts clean to prevent oxidation, using specific products for stainless steel if necessary. Apply a light layer of Vaseline oil for protection. When not in use for extended periods, store the oven in a dry, ventilated room or protect it with a suitable covering that allows ventilation and prevents condensation.

Note: If the oven is not used for long intervals, clean it immediately after use, once cooled, as fatty residues and foodstuffs can stain steel parts.

• This gas appliance must not be altered or tampered with. Any accommodation or assistance must be carried out by a technician.
• Regular maintenance is advisable.
• Refer to the maintenance instructions.

Storage & Preservation

When storing the appliance for extended periods, remove the cylinder and cover the oven to ensure proper ventilation and reduce condensation. Store the cylinder outdoors in a well-ventilated area.

Indications

Follow installation precautions and advice. Ensure stability of the oven, especially on trolleys. Use hard or compact surfaces. For free-standing models, ensure the support surface is fireproof and strong enough.

Leave one side open or provide adequate air intakes if the cylinder is inside the cabinet to avoid gas accumulation and overheating.

In case of malfunction or fire, shut off the cylinder valve and place the cylinder in a safe location. Never store spare cylinders near the oven.

Moving the oven is permitted only when it has cooled down and the cylinder valve is shut off. If the cylinder is outside, close and disconnect it before moving.

Technical Specifications:

Models: 6050-PRO

• Max system power output (LPG or METHANE): approx. 16 kW/h
• LPG (G30-G31)
• GAS CATEGORY: I3+ (28-30/37 mbar) Injector bore Ø 1.95 mm. GAS PRESSURE: 28-30 mbar (butane G30) - 37 mbar (propane G31). Countries: BE, CH, CY, CZ, ES, FR, GB, GR, IE, IT, LT, PT, SI, SK, AL, MK, TR.
• GAS CATEGORY: I3B/P (30 mbar) Injector bore Ø 1.95 mm. GAS PRESSURE: 28-30 mbar (butane G30, propane G31 or mixtures G30/G31). Countries: BG, CY, DK, EE, FI, GR, HU, IS, LT, LV, MT, NL, NO, RO, SE, SI, SK, AL, HR, MK, TR.
• GAS CATEGORY: I3B/P (50 mbar) Injector bore Ø 1.70 mm. GAS PRESSURE: 50 mbar (butane G30, propane G31 or mixtures G30/G31). Countries: DE, AT, CH, SK.
• METHANE (G20-G25)
• GAS CATEGORY: 2H, 2E, (20 mbar) Injector bore Ø 2.90 mm. Countries: AT, BG, CH, CY, CZ, DE, DK, EE, FI, GB, GR, IE, IT, LT, LU, LV, NL, NO, PL, PT, RO, SE, SI, SK, AL, HR, MK, TR.
• GAS CATEGORY: 2E+ (20/25 mbar) Injector bore Ø 2.90 mm. Countries: BE, FR.

Models: 6070-PRO

• Max system power output (LPG or METHANE): approx. 20 kW/h
• LPG (G30-G31)
• GAS CATEGORY: I3+ (28-30/37 mbar) Injector bore Ø 2.25 mm. Pilot injector bore 1xØ 0.22mm. GAS PRESSURE: 28-30 mbar (butane G30) - 37 mbar (propane G31). Countries: BE, CH, CY, CZ, ES, FR, GB, GR, IE, IT, LT, PT, SI, SK, AL, MK, TR.
• GAS CATEGORY: I3B/P (30 mbar) Injector bore Ø 2.25 mm. Pilot injector bore 1xØ 0.22mm. GAS PRESSURE: 28-30 mbar (butane G30, propane G31 or mixtures G30/G31). Countries: BG, CY, DK, EE, FI, GR, HU, IS, LT, LV, MT, NL, NO, RO, SE, SI, SK, AL, HR, MK, TR.
• GAS CATEGORY: I3B/P (50 mbar) Injector bore Ø 1.95 mm. Pilot injector bore 1xØ 0.22mm. GAS PRESSURE: 50 mbar (butane G30, propane G31 or mixtures G30/G31). Countries: DE, AT, CH, SK.
• METHANE (G20-G25)
• GAS CATEGORY: 2H, 2E, (20 mbar) Injector bore Ø 3.30 mm. Pilot injector bore 2xØ 0.29mm. Countries: AT, BG, CH, CY, CZ, DE, DK, EE, FI, GB, GR, IE, IT, LT, LU, LV, NL, NO, PL, PT, RO, SE, SI, SK, AL, HR, MK, TR.
• GAS CATEGORY: 2E+ (20/25 mbar) Injector bore Ø 3.30 mm. Countries: BE, FR.

Models: 8070-PRO

• Max system power output (LPG or METHANE): approx. 22 kW/h
• LPG (G30-G31)
• GAS CATEGORY: I3+ (28-30/37 mbar) Injector bore Ø 2.35 mm. Pilot injector bore 1xØ 0.22mm. GAS PRESSURE: 28-30 mbar (butane G30) - 37 mbar (propane G31). Countries: BE, CH, CY, CZ, ES, FR, GB, GR, IE, IT, LT, PT, SI, SK, AL, MK, TR.
• GAS CATEGORY: I3B/P (30 mbar) Injector bore Ø 2.35 mm. Pilot injector bore 1xØ 0.22mm. GAS PRESSURE: 28-30 mbar (butane G30, propane G31 or mixtures G30/G31). Countries: BG, CY, DK, EE, FI, GR, HU, IS, LT, LV, MT, NL, NO, RO, SE, SI, SK, AL, HR, MK, TR.
• GAS CATEGORY: I3B/P (50 mbar) Injector bore Ø 2.05 mm. Pilot injector bore 1xØ 0.22mm. GAS PRESSURE: 50 mbar (butane G30, propane G31 or mixtures G30/G31). Countries: DE, AT, CH, SK.
• METHANE (G20-G25)
• GAS CATEGORY: 2H, 2E, (20 mbar) Injector bore Ø 3.50 mm. Pilot injector bore 2xØ 0.29mm. Countries: AT, BG, CH, CY, CZ, DE, DK, EE, FI, GB, GR, IE, IT, LT, LU, LV, NL, NO, PL, PT, RO, SE, SI, SK, AL, HR, MK, TR.
• GAS CATEGORY: 2E+ (20/25 mbar) Injector bore Ø 3.50 mm. Pilot injector bore 2xØ 0.29mm. Countries: BE, FR.

Lighting

IMPORTANT:

• Before turning on the oven, check all connections and gas connections.
• Do not lean over the oven when lighting the gas; keep face and body away from the opening.
• When lighting, the door must NOT be closed; the opening must be open.
• The gas control knob must be in the zero (OFF) position.
• Do not move the oven when in use.

Preliminary Procedures:

• After connecting the gas line, check connections for leakage. Repair if necessary.
• With the knob in the zero (OFF) position, press the igniter button to check if it operates.
• If all is well, open the gas cock on the cylinder and light the oven according to model-specific instructions.

Lighting Models: 6050 - Pro

1. To light the oven burner, press and turn the control knob counter-clockwise to the high flame symbol.
2. While holding down the control knob, simultaneously press the ignition button to light the burner. Note: Lighting the burner for the first time, or after it has cooled down, may require several attempts due to air in the gas supply line.
3. Once the burner is lit, the ignition button can be released, but the control knob must be held down for a few seconds to ensure the thermocouple is hot enough for the burner to remain lit.
4. Release the control knob. The oven burner is lit on a high flame. Preheat the oven by closing the opening with the door and waiting 40 to 50 minutes for the refractory bricks to heat up.
5. After 40/50 minutes, the oven is ready for baking. Open the door to place pizzas inside. Immediately after baking, keep the door closed for a couple of minutes to allow the hob to quickly regain temperature. The flame can be adjusted by turning the control knob between min/max positions.

Lighting Models: 6070 - Pro, 8070 - Pro (With Pilot Lights)

1. To ignite the pilot light, press and turn the control knob to the spark symbol.
2. While holding down the control knob, simultaneously press the ignition button to ignite the pilot light. Note: Igniting the pilot light for the first time, or after it has cooled down, may require some attempts due to air in the gas supply line.
3. Once the burner is lit, the ignition button can be released, but the control knob must be held down for a few seconds to ensure the thermocouple is hot enough for the burner to remain lit.
4. Release the control knob. The oven burner is lit on a high flame. Preheat the oven by closing the opening with the door and waiting 40 to 50 minutes for the refractory bricks to heat up.
5. After 40/50 minutes, the oven is ready for baking. Open the door to place pizzas inside. Immediately after baking, keep the door closed for a couple of minutes to allow the hob to quickly regain temperature. The flame can be adjusted by turning the control knob between min/max positions.

Caution: If the flame does not ignite, release the control knob, return it to zero (OFF), wait a few minutes for unburned gas to disperse, and repeat the lighting procedure. Gas accumulation can cause hazardous flames or detonations.

Important: Visually inspect the flame. If a smell of gas, flashbacks, small pops, or uneven flames occur, there may be a fault in the gas circuit. Switch off the oven immediately.

Switch-off Procedure: Once baking is complete, shut off the cock on the cylinder and wait for the burner to switch off. Turn the control knob to zero (OFF).

Igniter: Uses a 1.5V AA battery. Unscrew the igniter cap, insert the battery observing polarity, and screw the cap back on. Remove the battery for extended periods of inactivity.

Troubleshooting

Ignition Failure or Malfunction

Ignitor: Check battery condition (1.5V AA); replace if flat or oxidized. For inactivity, remove the battery. Check wires and glow plug for damage; replace if damaged. Test circuit by pressing the button with gas shut off. If a spark is visible, the circuit is working; otherwise, check connections. If the system still doesn't operate, the electronic igniter may need replacement.

Valve: If damaged, it may not allow gas to transit or interrupts the flow.

• If no gas flow occurs when setting the knob to "max." (high flame) or "spark" position, ensure the cylinder valve is open.
• During ignition, keep the knob pressed to bypass the thermocouple safety.
• If the flame ignites but goes out when the knob is released, the thermocouple may not be hot enough. Repeat ignition and hold the knob longer.
• If the flame goes out after this operation, check the thermocouple connection, position, and condition. Replace if damaged. If the problem persists, the valve may need replacement.
• If ignition occurs but the flame does not remain independent at the "min" position, the minimum adjustment screw may need adjustment (factory default, do not change unless necessary).

Burner Issues

BURNER: May result in flashbacks or partial ignition.

• If flame returns occur, immediately close the gas supply and turn off the fire. Check for obstructions in the venturi tube (e.g., cobwebs).
• If the flame front does not burn completely along the burner, or if heating is inadequate, small pops or flashbacks may occur. Ensure burner holes are clear of food residue.
• If previous adjustments or injector replacements were made, ensure correct air/gas carburation. Check for incorrectly sized injectors.
• If there are no obstructions and the bores are open, but issues persist, the burner may be defective or worn and may need replacement. Regular maintenance ensures longevity.
• Have a technician carry out control and maintenance. Malfunctions can also depend on incorrect sensor positioning. If the thermocouple is not at the correct distance, it may misread temperature or wear out quickly. If the glow plug is too far, it may fail to produce a spark; if it's in contact, the pulse discharges without a spark.

Technical & Safety Notes

CAUTION: Danger of Burns

• Very hot parts during operation.
• Wear personal protective equipment (gloves or similar) to prevent accidents and burns.
• The door handle, even if made of silicone, may scald after prolonged use if not handled with gloves.

Models: 6050-PRO

• MAX. POWER OUTPUT: 16kW
• CONSUMPTION: (1164 g/h - LPG) (1525 dm³/h - NG)
• LPG
• CATEGORY I3+ (28-30/37 mbar) Ø INJECTOR 1.95 mm
• CATEGORY I3B/P (30 mbar) Ø INJECTOR 1.95 mm
• CATEGORY I3B/P (50 mbar) Ø INJECTOR 1.70 mm
• NG
• CATEGORY 2H, 2E (20 mbar) Ø INJECTOR 2.90 mm
• CATEGORY I3B/P (20/25 mbar) Ø INJECTOR 2.90 mm
• Tables provide detailed specifications for various gas categories, pressures, and countries. Areas in grey are not covered by certification.

Models: 6070-PRO

• MAX. POWER OUTPUT: 20kW
• CONSUMPTION: (1455 g/h - LPG) (1906 dm³/h - NG)
• LPG
• CATEGORY 13+ (28-30/37 mbar) Ø INJECTOR 2.25 mm, Ø PILOT INJECTOR 1x0.22 mm
• CATEGORY I3B/P (30 mbar) Ø INJECTOR 2.25 mm, Ø PILOT INJECTOR 1x0.22 mm
• CATEGORY I3B/P (50 mbar) Ø INJECTOR 1.95 mm, Ø PILOT INJECTOR 1x0.22 mm
• NG
• Tables provide detailed specifications for various gas categories, pressures, and countries. Areas in grey are not covered by certification.

Models: 8070-PRO

• MAX. POWER OUTPUT: 22kW
• CONSUMPTION: (1601 g/h - LPG) (2096 dm³/h - NG)
• LPG
• CATEGORY 13+ (28-30/37 mbar) Ø INJECTOR 2.35 mm, Ø PILOT INJECTOR 1x0.22 mm
• CATEGORY I3B/P (30 mbar) Ø INJECTOR 2.35 mm, Ø PILOT INJECTOR 1x0.22 mm
• CATEGORY I3B/P (50 mbar) Ø INJECTOR 2.05 mm, Ø PILOT INJECTOR 1x0.22 mm
• NG
• CATEGORY 2H, 2E (20 mbar) Ø INJECTOR 3.50 mm, Ø PILOT INJECTOR 2x0.29 mm
• CATEGORY 2E+ (20/25 mbar) Ø INJECTOR 3.50 mm, Ø PILOT INJECTOR 2x0.29 mm
• Tables provide detailed specifications for various gas categories, pressures, and countries. Areas in grey are not covered by certification.

Example of Data Plate: The shape may change while retaining the same information. Includes model, serial number, orifice size, consumption, input power, gas type, pressure, and country of use.

Disposal Information: At the end of its life cycle, the product must be taken to a suitable collection point for iron, electrical or electronic waste.

Parts List - Large Gas Oven

A detailed list of parts for the Large Gas Oven, including Position (Pos), Code, Description, and Quantity (Qty). Components include pizza stones, knobs, insulation, ignitors, caps, bases, hoods, chimneys, panels, doors, and shelves.

Exploded Illustrations - Large Gas Oven

Diagrams illustrating the assembly of the Large Gas Oven, with numbered parts corresponding to the Parts List.

Parts List - XL Gas Oven

A detailed list of parts for the XL Gas Oven, including Position (Pos), Code, Description, and Quantity (Qty). Components are similar to the Large Gas Oven but specific to the XL model.

Exploded Illustrations - XL Gas Oven

Diagrams illustrating the assembly of the XL Gas Oven, with numbered parts corresponding to the Parts List.

Parts List - Large Wood Oven

A detailed list of parts for the Large Wood Oven, including Position (Pos), Code, Description, and Quantity (Qty). Components include refractory bricks, board plus, feet, temperature gauge, chimney, assembly plates, tubes, wood holders, hoods, flame protectors, bases, covers, and panels.

Exploded Illustrations - Large Wood Oven

Diagrams illustrating the assembly of the Large Wood Oven, with numbered parts corresponding to the Parts List.

Parts List - XL Wood Oven

A detailed list of parts for the XL Wood Oven, including Position (Pos), Code, Description, and Quantity (Qty). Components are similar to the Large Wood Oven but specific to the XL model.

Exploded Illustrations - XL Wood Oven

Diagrams illustrating the assembly of the XL Wood Oven, with numbered parts corresponding to the Parts List.

Warranty

Ovens are covered by a legal guarantee of 24 months from the date of purchase, payable by the retailer. After this period, repairs are borne by the consumer. Keep the receipt or purchase invoice.

Good maintenance and proper use are essential. Store the oven indoors in winter or protect it with a breathable, waterproof tarpaulin.

The warranty DOES NOT apply in the following cases:

• Improper use or installation not described in the manual.
• Tampering with the oven.
• Inadequate maintenance. Damage to the burner due to cooking residues or use of other fuels.
• Alterations to the oven.
• Use of fuels other than the recommended fuel (no liquid charcoal for barbecue, chemicals, or other fuels).
• Damage resulting from the use of chemicals inside or outside the oven.
• The door is not under warranty.
• Damage due to exceeding the indicated temperature of the pyrometer (above 450°/500°C or 840°/1000°F).
• Use of components not produced or recommended by the manufacturer.
• Damage to non-functional and decorative parts that do not affect normal oven use (scratches, color differences).
• Removal, modification, or illegibility of the data plate.
• Tables are not covered by warranty; additional spare parts can be purchased on request.

Note down the model, serial number, and date of purchase for future reference. The Data Plate is visible at the rear end of the oven.