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Marra Forni Traditional User Manual

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Marra Forni: Traditional
Installation/Operation Manual
10310 Southard Drive
Beltsville, MD 20705
Bus. 1.888.239.0575
Fax. 240.667.7991
info@marraforni.com
marraforni.com
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Marra Forni Traditional Specifications

General IconGeneral
TypePizza Oven
Available Diameters (Internal)36", 44", 48"
Fuel TypeGas
Temperature RangeUp to 1000°F
DimensionsVaries by model

Summary

WARNINGS

Improper Installation and Maintenance

Warnings about improper installation, adjustment, alteration, service, or maintenance causing damage, injury, or death.

Oven Related Fire Hazards

Major cause of oven related fires is failure to maintain required clearances to combustible materials.

Prohibited Appliance Usage

Warning against using the appliance as a space heater to avoid carbon monoxide poisoning.

Airflow Obstruction Risks

Warning about covering openings, blocking airflow, causing carbon monoxide poisoning or fire hazard.

Flammable Vapors Prohibited

Prohibition of storing or using gasoline or other flammable vapors near the appliance.

Gas Source Heat Safety

Requirement to post a statement if using gas as a heat source regarding gas smell detection.

IMPORTANT INFORMATION

Clearance Requirements

Specifies minimum clearances for combustible and non-combustible construction around the oven.

Burner Housing Air Opening

Details the required minimum opening for the burner housing for proper combustion.

Electrical Grounding Standards

Outlines electrical grounding requirements according to local and national codes.

Gas Supply Pressure Testing

Procedures for disconnecting and isolating the appliance during gas supply piping pressure testing.

Requirements for Oven Installation

Moving and Leveling the Oven

Instructions for moving the oven to its location and ensuring it is level using shims.

LIFTING & MOVING YOUR OVEN

Forklift Lifting Model 90

Instructions for lifting the Model 90 oven using a forklift from the center crossbars.

Forklift Lifting Models 110-150

Instructions for lifting the Models 110, 140, 150 ovens using a forklift from the sides.

Safe Forklift Operation

Detailed steps for safely lifting the oven with a forklift, ensuring proper fork placement.

Safe Pallet Jack Operation

Instructions for safely lifting the oven with a pallet jack, emphasizing capacity and placement.

OVEN INSTALLATION INSTRUCTIONS

Location Selection and Floor Space

Guidance on selecting a location and marking the floor space for oven installation.

Clearance Between Oven and Surroundings

Specifies minimum clearance between the ceiling and oven, and sidewalls.

Anchor Bolt Installation

Instructions for drilling holes and inserting anchor bolts to fasten plates to the concrete floor.

Non-Combustible Oven Facing

Options for facing the oven dome with non-combustible materials like brick or tile.

CURING

Gas Oven Curing Procedure

Step-by-step procedure for curing a gas oven over five days.

Wood-Fired Oven Curing Procedure

Step-by-step procedure for curing a wood-fired oven over five days.

OVEN CARE & CLEANING

Oven Floor Cleaning Methods

Methods for cleaning the oven floor, including removing debris and spills.

Stainless Steel Surface Care

Guidance on cleaning stainless steel surfaces with mild soap and water.

Exhaust System Maintenance

Importance of regular cleaning and maintenance of the exhaust system to prevent fires.

Door Usage for Heat Retention

How to use the door for heat retention and manage coals.

STRUCTURAL BUILD OF OVEN / VENTING

Oven Material Layers

Details the layers of materials from inside to outside the oven structure.

Permitted Venting Methods

Explains permitted venting methods: direct venting and Type I exhaust hood.

Type I Exhaust Hood Requirements

Specifies requirements for Type I exhaust hoods, including clearances and dimensions.

Direct Venting Installation Guide

Refers to Lennox Chimney Supply for direct venting installation requirements.

DIRECT VENTING - TRADITIONAL MODEL

Grease Duct Diameter by Oven Size

Specifies the required inside grease duct diameter based on oven size.

Direct Venting Installation Diagram

Illustrates the installation required for a direct venting application according to ETL guidelines.

Local Jurisdiction Regarding Duct Shafts

Advises consulting local authorities regarding fire-rated duct shafts.

Chimney Installation Compliance

Emphasizes installing the chimney according to manufacturer's instructions and ETL listing.

Combustion Air Intake: Installation Principles

Proper Air Intake Installation

Details correct room isolation and open air intake for combustion.

Improper Air Intake Installation Effects

Explains how diverted combustion air causes backflow.

Combustion Air Intake: Airflow Management

Warning Against Additional Air Vents

Advises against adding vents, which disrupts airflow.

Consequences of Blocked Air Intake

Explains poor performance from blocked air intake.

Combustion Air Intake: Installation Details

Service Space and Non-Combustible Board

Specifies service space and application of non-combustible board.

GAS INSTALLATION

Gas Type and Leak Checks

Connect oven to correct gas type and check for leaks using soap and water.

Manifold Pressure Setting

How to check and set manifold pressure, referring to the nameplate.

Gas Supply Connection

Connecting 3/4" gas supply with nonreactive joint compound and installing shutoff valve.

Electrical Connection and Grounding

Connecting the gas burner control box to a 120 VAC power supply and ensuring grounding.

OPERATING INSTRUCTIONS (FOR WOOD OR GAS OVENS)

Instruction Comprehension

Emphasizes that all operators must read and understand instructions for safe operation.

Proper Hearth Cooking Surfaces

Only pizza and/or bread products should touch the hearth; use cookware for other foods.

Over-Firing Warning

Warning against over-firing, indicated by flames spilling out or temperature exceeding 1000°F.

Fire Extinguisher Requirement

Keep a wood fire-rated extinguisher nearby and ensure personnel are aware of its use.

Fueling and Fire Stirring

How to poke and stir the fire with a wood tool to improve combustion.

Ash Disposal and Food Preparation

Cleaning cooking area and procedures for non-dough based foods.

Exhaust System Combination Warning

Warning against combining exhaust systems for solid fuel and non-solid fuel equipment.

Oven Use and Fire Maintenance Guidelines

Fuel, Storage, and Fire Safety

Guidelines for fuel types, storage, exhaust hoods, and fire safety.

Ash Disposal and Hearth Cleaning

Procedures for ash disposal, hearth cleaning, and wood storage.

Wood Fire Maintenance: Cleaning and Prevention

Area Cleaning and Creosote Management

Cleaning around the oven and managing creosote buildup.

Filter Cleaning and Vent System Checks

Daily cleaning of grease filters and regular vent system inspection.

Maintenance Warnings and Fuel Usage

Warnings on hot oven maintenance and guidelines for dual fuel usage.

TO IGNITE OVEN (GAS)

Gas Ignition Steps

Steps to ignite the gas oven, including turning on blowers, gas valve, thermostat, and switch.

SHUTTING DOWN OVEN (GAS)

Gas Oven Shutdown Procedures

Procedures for temporary and complete shutdown of the gas oven.

TO FIRE OVEN (WOOD)

Wood Ignition Steps

Steps to start a wood fire in the oven, including using firestarter and kindling.

Flammable Liquids Caution

Warning to keep flammable liquids away from the oven and not use them for starting fires.

Adding Firewood

Guidance on adding larger pieces of firewood once kindling is burning well.

Maintaining Heat Rate

How to maintain desired heat rate and signs of over-firing.

USING THE GAS BURNER CONTROL PANEL

Control Panel Operation Steps

Step-by-step guide to operating the gas burner control panel for temperature setting.

GAS BURNER MAINTENANCE

Regular Cleaning and Servicing

Instructions for regular cleaning and servicing of the gas burner, including disconnecting power.

Burner Removal for Cleaning

Steps to remove the burner for cleaning, including disconnecting gas and igniter.

Burner Replacement After Cleaning

Procedures for reinstalling the burner after cleaning.

Gas Leak Check Warning

Warning never to use an open flame to check for gas leaks; use soap/water solution.

Daily Thermal Oven Cleaning

High-Temperature Cleaning Procedure

Procedure for daily thermal cleaning by increasing oven temperature to 850°F.

Oven Door During Thermal Cleaning

Instructions on leaving the oven door slightly open and avoiding cleaning agents.

General Oven Shutdown Procedures

Steps for Oven Shutdown

Steps for shutting down the oven, including turning off power and gas.

Gas Burner Technical Specifications

EC200 Gas Burner Features

Description of the EC200 gas burner design and air shutter.

Burner Model Specifications Data

Table of specifications for various burner models and components.

Fan Performance Data

Graphs and tables for sound, capacity, and plume height of fan models.

GAS BURNER FULL SPECIFICATIONS

Burner Fuel and Output Specifications

Full factory specifications for the gas burner, including fuel types and BTU output.

Flame Safety and Valve Notes

Details on flame safety, automatic gas valve, and notes on SCFM and derating for altitude.

GAS BURNER WIRING DIAGRAM

115V Wiring Diagram

Wiring diagram for the EC200/300 115V gas burner system.

230V Wiring Diagram

Wiring diagram for the EC200/300 230V gas burner system.

Wiring Diagram Legend

Legend explaining the symbols and conventions used in the wiring diagrams.

GAS BURNER SERVICE

Gas Supply Pressure Caution

Caution regarding gas supply pressure and regulator adjustment to prevent overfire conditions.

Gas Valve Defect Identification

How to identify a defective gas valve based on constant manifold pressure and inlet pressure.

Gas Valve Leakage on Standby

Identifying gas valve leakage on standby and the need for replacement.

Electronic Control Operation Modes

Description of electronic control operation in heat mode and lockout conditions.

Explosion Hazard Warning

Caution about explosion hazard and malfunction if the device gets wet.

GAS BURNER MAINTENANCE

Motor Maintenance Requirements

Motor features permanently lubricated ball bearings and requires no routine maintenance.

Burner Flame Check

How to check the burner flame color and what it indicates about fuel mixture.

Standby Flame Caution

Caution regarding standby flame or premature ignition spark activation requiring immediate shutdown.

Propane Gas Leak Warning

Warning to install a gas leak warning device when using propane in confined spaces.

TROUBLESHOOTING

Blue Flame Issue Resolution

Check shutter closure for blue flame issues.

High/Low Flame Setting Adjustment

Verify wire connections and test temperature control dial for stuck flame settings.

Burner Shuts Itself Off

Check low flame and adjust regulator if burner shuts itself off.

Burner Will Not Light

Check gas supply, turn oven off/on, and ensure combination gas valve is ON.

Reset Light ON Troubleshooting

Adjust low flame regulator to ensure sufficient gas reaches the oven.

Control Box Not Turning On

Check for blown fuses or contact Marra Forni representative if control box is unresponsive.

Display Reads 'Open' Resolution

Ensure the Thermocouple is plugged into the control box.

Flame Size Adjustment

Adjust the high and low flame regulators.

Spark Igniter Not Working

Use paper to light oven and contact Marra Forni for replacement burner.

Electrical and Flame Check Procedures

Diagnostic LED Status Interpretation

Interpreting LED flashes for faults, airflow, and ignition lockout.

Valve and Control Position Confirmation

Confirming shut off valve, gas knob, thermostat, and safety controls.

Grounding and Voltage Checks

Verifying burner grounding and line voltage between wires.

Transformer and Thermostat Voltage Verification

Checking 24V at transformer and thermostat connections.

Blower Motor and Interlock Switch Checks

Confirming blower motor operation and checking PSW terminal voltage.

V1 Terminal Voltage and Ignition Spark

Verifying V1 terminal voltage and checking for ignition spark.

Main Flame Presence and Gas Valve Voltage

Checking for flame, air in gas line, and 24V to gas valve.

Flame Current Signal Strength Check

Checking flame current signal strength for proper burner setup.

GAS BURNER PARTS ISOMETRIC VIEW

EC200 Burner Assembly Parts

Lists parts for the EC200 burner head assembly, bracket, and spark rod assembly.

EC200/EC300 Blower Motor Parts

Lists parts for EC200/EC300 blower motor assembly, wheel, and motor.

EC200/EC300 Valve and Shutter Parts

Lists parts for slow opening valves, air shutter assemblies, and inlet ring.

Control and Transformer Parts

Lists parts for control assembly, strain relief, ignition cable, and flame rod wire.

Additional Parts Not Shown

Lists parts not shown in the diagram, such as mounting flange kit and wire kit.

OVEN FAN GSV 009-016

Fan Description and Material

Description of the exhaust fan, its housing material, and construction.

Fan Motor Specifications

Details about the fan motor, including type, insulation, and protection class.

Standard and Optional Equipment

Lists standard equipment like junction box and optional equipment like speed control.

Fan Listings and Approvals

Lists ETL and ULC certifications and CE compliance for the fan.

Fan Warranty Information

Details the 2-year factory warranty and 10-year warranty against corrosion perforation.

OVEN FAN GSV 009-016 Specifications

Fan Model Discharge Specifications

Table comparing discharge velocity, amperage, and power ratings for different fan models.

Fan Model Dimensions

Table detailing the dimensions (A-E) for various GSV fan models.

Sound Diagram Data

Table showing sound pressure levels (Lw dB) for different fan models at various frequencies.

Fan Capacity and Plume Height

Graphs illustrating fan capacity (CFM vs. Ps) and plume height for different fan models.

UL, CSA, ETL & CE FACT SHEET

Acronym Definitions

Defines the acronyms UL, CSA, ETL, and CE related to product certifications.

Underwriters Laboratories (UL)

Information about Underwriters Laboratories, Inc. and its role in product safety testing.

Canadian Standards Association (CSA)

Information about the Canadian Standards Association and its marks.

Intertek Testing Services (ETL)

Details on Intertek Testing Services and the ETL mark for product safety.

European Conformity (CE) Mark

Explanation of the CE mark and its significance for products in the European Union.

Certification Mark Assurance

Summary of certification marks as assurance of electrical safety and emissions standards.

WARRANTY

Warranty Coverage and Period

Details Marra Forni's one-year warranty against defects in material or manufacture.

Warranty Exclusions

Lists instances where the provided warranties do not apply, such as improper installation or use.

Limitations of Liability

Defines Marra Forni's sole obligation as repair/replacement and limits liability for damages.

Electrical and Flame Check Procedures

Diagnostic LED Status Interpretation

Interpreting LED flashes for faults, airflow, and ignition lockout.

Valve and Control Position Confirmation

Confirming shut off valve, gas knob, thermostat, and safety controls.

Grounding and Voltage Checks

Verifying burner grounding and line voltage between wires.

Transformer and Thermostat Voltage Verification

Checking 24V at transformer and thermostat connections.

Blower Motor and Interlock Switch Checks

Confirming blower motor operation and checking PSW terminal voltage.

V1 Terminal Voltage and Ignition Spark

Verifying V1 terminal voltage and checking for ignition spark.

Main Flame Presence and Gas Valve Voltage

Checking for flame, air in gas line, and 24V to gas valve.

Flame Current Signal Strength Check

Checking flame current signal strength for proper burner setup.

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