Instructions For Maintenance; Reminders For The Maintenance Technician; Conversion To A Different Type Of Gas; Commissioning - Mareno NFT74G Serie Instrucciones Para Instalación, Uso Y Mantenimiento

• Disconnect the appliance electric supply, if present, before
carrying out any operation.
• Clean the satin finish stainless steel exterior surfaces, the
cooking wells and the surface of the hotplates every day.
• At least twice a year, have an authorized technician clean the
internal parts of the appliance.
• Do not use direct or high pressure water jets to clean the
appliance.
• Do not use corrosive products to clean the floor beneath the
appliance.
• Not wash in the dishwasher the body and the flame sprea-
ders of the burners of the cooking hob.
SATIN FINISH STAINLESS STEEL SURFACES
• Clean the surfaces with a cloth or sponge using water and
proprietary non-abrasive detergents. Follow the grain of the
satin finish. Rinse repeatedly and dry thoroughly.
• Do not use pan scourers or other iron items.
• Do not use chemical products containing chlorine.
• Do not use sharp objects which might scratch and damage
the surfaces.
HOTPLATE IN DUCTILE IRON
• Clean surfaces with a damp cloth.
• Switch on for a few minutes to dry rapidly.
• Lubricate surfaces with a fine coat of food grade oil.
CHROMED HOTPLATE
• Clean the cooking surface while it is still moderately
hot(approx. 80-100°C ). Use a cloth or sponge soaked in wa-
ter and vinegar. Rinse thoroughly and dry carefully.
• Do not use pan scourers or abrasive powder detergents.
• Do not use chemical products containing chlorine.
• Do not use sharp objects which might scratch and damage
the surfaces.
COLLECTION TRAYS
Clean the surface, removing grease, oil, food residue etc.

INSTRUCTIONS FOR MAINTENANCE

REMINDERS FOR THE MAINTENANCE TECHNICIAN

The manufacturer will not be liable for any damage or in-
jury resulting from failure to observe the following rules.
• Read this manual carefully. It provides important information
for safe installation, use and maintenance of the appliance.
• Disconnect the appliance electric supply, if present, before
carrying out any operation.
• Installation, conversion to a different type of gas and applian-
ce maintenance must be carried out by qualified technicians
authorized by the manufacturer, in compliance with current
safety standards and the instructions in this manual.
• Identify the specific appliance model. The model number is
detailed on the packaging and on the appliance data plate.
• The appliance must be installed in a well-ventilated room.
• Do not obstruct any air vents or drains present on the ap-
pliance.
• Do not tamper with appliance components.

16 CONVERSION TO A DIFFERENT TYPE OF GAS

See Chapter " Instructions for installation ".

17 COMMISSIONING

Following installation, conversion to a different type of gas or
any maintenance operations, check appliance operation.In the
event of any malfunction, consult the next Paragraph "Trou-
bleshooting".
17.1 GAS APPLIANCES
Switch on the appliance as directed in the instructions and re-
minders for use given in Chapter " INSTRUCTIONS FOR USE
" and check:
• the gas supply pressure ( see next Paragraph ).
• the correct ignition of the burners and the effectiveness of the
fumes removal system.
17.1.1 CHECKING THE GAS SUPPLY PRESSURE
• To measure the gas supply pressure use a manometer with a
minimum definition of 0.1 mbar.
• Remove the control panel.
• Remove the screw from the pressure test point PP and con-
nect the manometer to the test point.
• Make the measurement with the appliance in operation.
IMPORTANT! If the gas supply pressure is not within the limits
( Min. - Max ) indicated in Table T2 , cease operation of the
appliance and contact the gas utility company.
• Disconnect the manometer and retighten the retaining screw
on the pressure connection.
17.2 ELECTRICAL APPLIANCES
Switch on the appliance as directed in the instructions and re-
minders for use given in Chapter " INSTRUCTIONS FOR USE
" and check:
• the current values of each phase.
• the correct operation of the heating elements.

18 TROUBLESHOOTING

18.1

GAS FRY-TOP WITH TAP

The pilot burner does not light
Possible causes:
• Insufficient gas supply pressure.
• Blocked tubing or nozzle.
• Defective gas tap or valve.
• Igniter defective or not properly connected.
• Igniter or igniter wire defective.
Pilot burner goes out during use
Possible causes:
• Insufficient gas supply pressure.
• Defective gas tap or valve.
• Defective thermocouple or insufficient heating.
• Thermocouple incorrectly connected to gas tap or valve.
• Knob of gas tap or valve not pressed sufficiently.
The main burner does not light ( even though pilot is lit )
Possible causes:
• Insufficient gas supply pressure.
• Blocked tubing or nozzle.
• Defective gas tap or valve.
• Defective burner ( gas outlet holes clogged ).
18.2

GAS FRY-TOP WITH VALVE

The pilot burner does not light
Possible causes:
7