FORNI CLASSICO GAS 110 User manual

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GAS OVEN
INSTALLATION AND OPERATING MANUAL
CLASSICO GAS 110 – 120 – 130 – 140 - 150
MLF GAS 110 – 120 – 130 – 140 – 150
SOMMA GAS 110 – 120 – 130 – 140 – 150
VULCANO GAS 110 – 120 – 130 – 140 – 150
PLEASE READ ALL INSTRUCTIONS BEFORE INSTALLING AND USING
THE APPLIANCE
A major cause of oven – related fire is failure to maintain required
clearances (air space) to combustible materials. It is of utmost
importance that this oven be installed only in accordance with these
instructions
SAVE THESE INSTRUCTIONS
Vers. 042022
Stefano Ferrara Forni S.R.L.
Forni artigianali napoletani
Neapolitan handmade brick ovens
Via Provinciale Pianura,2 – int.12
80078 Pozzuoli, Napoli
Tel./Fax: [phone]
e-mail: [e-mail]
P.IVA 06771801211
C.C.I.A.A. 838246

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Table of content Page
- Introduction ............................................................................................................................................................. 3
- Installation operating and maintenance preface....................................................................................................... 5
- Features................................................................................................................................................................... 6
- Models and sizes ..................................................................................................................................................... 7
- Instruction for lifting and moving oven ..................................................................................................................... 9
- Packaging removing and placement oven on support stand ………………………………….... ................................ 11
- Installation procedures
•General information …………………………………………………………………………..... .......................... 12
•Stand covering installation (optional for Classico, Somma, Vulcano models)……………………………….. 13
•Stand covering installation for MLF model……………………………........................................................... 14
•Assembly of the burner............................................................................................................................... 18
- Connections
•Electrical connection ………………………………………………………………………….............................. 21
•Gas connection …………………………………………………………………………...................................... 22
- Sample of LPG system ……………………………… ................................................................................................ 24
- Oven venting …………………………………………………………………………………………….............................. 25
- Oven care during first fires …………………………………………………………………………… .............................. 26
- Use of the oven with wood ...................................................................................................................................... 27
•Maintenance and cleaning ......................................................................................................................... 28
- Burner components.................................................................................................................................................. 29
- Control panel............................................................................................................................................................ 30
- Celsius/Fahreneit change ....................................................................................................................................... 31
- First ignition and adjustmen
•First burner ignition ..................................................................................................................................... 32
•Burner unlock.............................................................................................................................................. 33
•Cooking temperature setting....................................................................................................................... 33
•Gas adjustment 1
st
. flame ........................................................................................................................... 34
•Adjust 1
st
. flame .......................................................................................................................................... 34
•Air adjustment 1
st
. flame ............................................................................................................................. 35
•Gas adjustment 2
nd
. flame .......................................................................................................................... 36
•Air adjustment 2
nd
. flame ............................................................................................................................ 36
•Setting safety limit temperature .................................................................................................................. 37
•Burner operation with control panel ............................................................................................................ 38
•ON/OFF second flame function .................................................................................................................. 38
•Manual/Automatic function.......................................................................................................................... 38
•Booster function.......................................................................................................................................... 39
•Switching the burner OFF through control panel ........................................................................................ 39
•Error messages .......................................................................................................................................... 40
- Maintenance ............................................................................................................................................................ 41
•Routine maintenance.................................................................................................................................. 42
•Special maintenance .................................................................................................................................. 43
- Burner gas conversion ............................................................................................................................................. 44
•Conversion on the control panel ................................................................................................................. 44
•Nozzles replacement .................................................................................................................................. 45
•Flame arrestor replacement........................................................................................................................ 47
- Replacing components ............................................................................................................................................ 47
•Sit control equipment replacement ............................................................................................................ 48
•Probe replacement .................................................................................................................................... 50
•Control Unit fuse replacement .................................................................................................................... 50
•Ignition detection electrode replacement .................................................................................................... 50
- Error messages........................................................................................................................................................ 51
- Troubleshooting ....................................................................................................................................................... 52
•Control panel doesn’t switch on.................................................................................................................. 52
•Control panel turns ON but the burner doesn’t start ................................................................................. 52
•Control panel turns ON, the spark strikes, F1 doesn’t turn ON and the burner blocks .............................. 52
•Control panel turns ON, F1 turns ON but the burner blocks and F1 turns OFF ......................................... 53
•Control panel turns ON, F1 turns On but after 15-20 seconds F2 does not turn ON ................................. 53
•Probe fault led turns ON ............................................................................................................................ 53
•Red display with “- - -”................................................................................................................................. 54
•Red display with T° inside the oven greater than the T° set on the green display ...................................... 54
•Green display: Set T° does not increase ................................................................................................... 54
•Slower heating than the normal parameters .............................................................................................. 55
•Soot under the dome ................................................................................................................................. 55
•Red display (T° inside the oven) exceeds the green display with 2
nd
. flame led OFF ................................ 55
- Control unit diagram................................................................................................................................................. 56
- Connections diagram ............................................................................................................................................... 56
- Probe connections ................................................................................................................................................... 57

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INTRODUCTION
This manual has been made so that the user of the oven can work in complete safety.
THE USER HAS OBLIGATION TO READ CAREFULLY AND TO OBSERVE CAREFULLY THE
INSTRUCTIONS OF THE MANUAL.
Failure to comply with the instructions contained in this manual, means to operate in the conditions of use
not foreseen by the manufacturer.
THE MANUFACTURER IS NOT LIABLE FOR ANY DAMAGES CAUSED BY THINGS OR PERSONS,
DUE TO THE FAILURE TO OBSERVE THE INSTRUCTIONS AND THE RECOMMENDATIONS IN THIS
MANUAL.
The manual must be kept in good condition and must always be available for quick reference in case of
need.
THE MANUAL IS OF OWNERSHIP OF THE MANUFACTURER AND CANNOT BE REPRODUCED EVEN
PARTIALLY, AS WELL AS IT CANNOT BE DIFFUSED OR USED FOR ADVERTISING PURPOSE OR
SHARED WITH THIRD PARTIES.
ANY TRANSGRESSION WILL HAVE CIVIL AND PENAL SANCTIONS AS A CONSEQUENCE.
EXPLANATION OF SYMBOLS AND WARNINGS
SYMBOL DESCRIPTION
Symbol used to identify information of particular importance within the manual. The
information also concerns the safety of the personnel involved in the use of the
machine.
Symbol used to indicate passages of technical importance in the instructions and
warnings or procedures related to operator safety.
Symbol used to indicate warnings or procedures related to electricity.
NOTE ON THE PRODUCT
The aim of the manufacturing company is to make ovens that meet the current technical state. So we always
take care of our products even after delivery.
For any problems or inconveniences contact the service center:
Email: [e-mail] - tel. [phone]

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INTRODUCTION ABOUT INSTRUCTIONS OF WORKING
These instructions have the task of allowing and facilitating the safe and appropriate use of the OVEN and of
exploiting the regulatory use possibilities provided.
Their observance helps to avoid dangers, repair costs, to reduce off-duty times and to increase the lifespan
of the device.
Operating instructions are to be followed also taking in consideration the regulations on accident prevention
and environmental protection valid in the country of installation
BUYER'S OBLIGATIONS
The buyer is obliged to:
• Observe the national regulations concerning workplace safety;
• Observe the instructions contained in the manual.

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INSTALLATION OPERATING AND MAINTENANCE PREFACE
WARNING
READ THIS ENTIRE MANUAL BEFORE YOU INSTALL THE OVEN. FAILURE TO
FOLLOW INSTRUCTIONS MAY RESULT IN PROPERTY DAMAGE, BODILY
INJURY, OR EVEN DEATH.
•When this oven is not properly installed, a fire may result. To reduce the risk of fire, follow the
installation instructions
•Contact your local building or fire officials for clarification on any restrictions on installation of this
oven in your area, or need for inspection of the oven installation.
•DO NOT close the oven door while a fire is in the oven.
•Place the door over the oven opening after cooking is completed at the end of the work day.
•Hot while in operation. Keep children, clothing and furniture away. Contact may cause skin burns.
•Do not burn garbage or flammable fluids.
•Smokes of the burning must be expelled through a flue system conform to the local rules.
•Do not connect the oven to a chimney flue serving another appliance.
•Keep children and pets away from hot oven.
•DO NOT USE products not specified for use with this oven.
•DO NOT USE liquid fuel (firelighter fluid, gasoline, lantern oil, kerosene or similar liquids) to start or
maintain a fire.
•DO NOT use water to dampen or extinguish fire in the oven.
•Keep a proper extinguisher (class A) close to the oven at all times.
•Instruct all personnel about location and use of the fire extinguisher and proper fire emergency
procedures.
•DO NOT pack required air spaces with insulation or other materials.
•DO NOT expose the oven to the weather, if the oven is installed outdoors to shelter it under a
canopy.
•The oven is meant only for cooking pizza and/or bread it is not recommended for cooking other food
or food in pan ,chafe of metal pans can get the floor soon damaged and grease spatter from
roasting can be absorbed from the floor that lose its correct properties of cooking.
•In case of use of the oven with wood use only well dried wood.
•In case of use of the oven with wood, use a metal shovel to remove the ashes and place them in a
metal bin with a tightly fitting lid. The container should be stored on a non-combustible surface, away
from all combustible materials. Ensure ashes are completely cold before disposing of them
appropriately.
SAVE THESE INSTRUCTIONS

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FEATURES:
Plain of cooking : Biscotto di Sorrento
Crown and dome :refractory bricks 60 mm. thick , they bear temperature of over 900°C (1650F)
External hood :Santa Maria Bricks modeled by hand.
External covering : Mosaic tiles – palladiana marble
Electronic burner with two modulating flames max thermal capacity Kw.34 – Kcal/h 29200
Electronic unit control for temperature management
Temperature range of working: 0°C – 500°C ( 32F – 392F)
Electronic unit control for temperature management
Alimentation : Gas
Gas consumption max. temp.:
- Natural gas: 3,50 Nmc/h
- LPG: 1,22 Nmc/h
Flue output : 250 mm.
Max heat output : 29000 kcal – 34 kw
Smokes temperature output : 190°C (374 F)
Extract air flow: 650 mc/h (at the time of starting)
500 mc/h (at the time of the oven fully operating)
Required CFM: 380
Venting : Natural draft
Electrical supply: 220 V – 50/60 Hz one phase
Electrical absorption :100 Watt.
Gas connection : ½ inch
Gas pressure : Natural gas : from 7 mbar - to 25 mbar
LPG : from 20 mbar - to 50 mbar
It’s required a direct connection of the tube at oven service from gas meter to the oven no other equipment
must be installed on the same line between the meter and the oven.
For the gas line use the follows pipes size:
- Distance from the gas meter to the oven until 10 meters (32 ft) use:
For LPG ½ “ pipe
For Natural gas ¾” pipe
- Distance from the gas meter to the oven over 10 meters (32 ft) use 1”pipe (independently to the
gas in use)

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MODELS AND SIZES
CLASSICO
MLF

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SOMMA
VULCANO

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INSTRUCTIONS FOR LIFTING AND MOVING OVEN
FOR OVEN ALREADY INSTALLED ON THE SUPPORT STAND
1- USING A FORKLIFT
Determine if forklift capacity is sufficient to lift oven. (See pag. 7-8 for weights and sizes)
Prior to lifting, make sure the forks are long enough as whole diameter of the oven, if not fork extensions
should be used.
Keep forklift straight. Carefully place forks on the back of the oven through the stand legs
and position under the oven. Slowly lift and move the oven as needed
WARNING: MAKE SURE NOT TO DAMAGE THE BURNER DURING INSERTING THE
FORKS BETWEEN THE STAND LEGS.
2- USING A PALLET JACK
Determine if pallet jack capacity is sufficient to lift oven. (See pag. 7-8 for weights and sizes)
Prior to lifting, make sure pallet jack is long enough to reach both horizontal angles at lower end of steel tube
support legs. Place pallet jack on the back of the oven , place the forks between tube steel support legs
under horizontal angles.
Carefully lift oven and move slowly.

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INSTRUCTIONS FOR LIFTING AND MOVING OVEN
FOR OVEN SEPARATED FROM THE SUPPORT STAND
1- USING A FORKLIFT
Determine if forklift capacity is sufficient to lift oven. (See pag. 7-8 for weights and sizes)
Prior to lifting, make sure the forks are long enough as whole diameter of the oven, if not fork extensions
should be used.
Under the oven there are four little steel feet 4” (10 cm) high to permit placing of the forks.
Keep forklift straight. Carefully place forks on the back of the oven through the steel feet and position under
the oven. Slowly lift and move the oven as needed.
2- USING A PALLET JACK
Determine if pallet jack capacity is sufficient to lift oven. (See pag.8 for weights and sizes)
Prior to lifting, make sure the forks are long enough as whole diameter of the oven.
Place pallet jack on the back of the oven, place the forks between the steel feet and position under the oven.
Carefully lift oven and move slowly.
WARNING : STRICTLY FORBIDDEN TO INVERT THE OVEN ALSO ON A SIDE , ONLY
VERTICAL LIFTING IS ALLOWED

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PACKAGING REMOVING AND PLACEMENT OF THE OVEN ON SUPPORT STAND
On the bottom of the crate (front side and back side) there is the required space for insert the forks of the
forklift. (photo 1)
The crate is fixed to two metal brackets placed under the oven (photo 2)
photo 1 photo 2
Once removed the crate for removing the brackets , lifting the oven with a forklift and unscrewing the bolts.
Note: the removed bolts (17 mm. – 0.67 in. hexagonal head screw) will be the same to use for fixing the
oven on the support stand, so preserve them for the next use.
Lifting the oven with a forklift until a higher height than the metallic support stand
Let down carefully for inserting the steel feet placed under the oven into the legs of the support stand
respecting the marked letters :
- Front : A – A
- Back : B – B
Once placed the oven on the support stand to screw the furnished screws (17 mm. – 0.67 in. hexagonal
head screw) in the existing holes on the back of each stand leg.

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INSTALLATION PROCEDURES
1. Be sure to have a sufficient space in the desired location for the oven.
See pag. 7 – 8 for minimum space required according the model
2. Place the oven on appropriate floor able to support the oven weight.
3. Any adjacent combustible floor which projects in front of the oven opening must be a minimum of 30
inches (75 cm) away from each side of the door opening and 36 inches (90 cm.) from the front of
the door opening.
4. It is essential to maintain clearance space between the oven components and any combustible
material, such as walls and ceilings.
The oven must have a minimum 10” (25,5 cm.) clearance to combustibles from all sides and 14"
(35,5 cm) clearance to combustibles from the top.
Warning : Don’t place any type type of insulation in the required clearance spaces surrounding the
oven

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5. Stand covering installation (optional for models Classico, Somma e Vulcano)
For such working below listed tools are required:
a) Spanner for hexagonal head screws 10 mm. (0.40 in)
b) Spanner for hexagonal head screws 17 mm. (0.67 in)
The stand leg covering is provided of some small holed metallic bands (A - photo 1) to fix to the studs
installed at the oven bottom “B” photo 1 with hexagonal nuts 13 mm - 0.51 in
The cover is divided into two parts, place the right part and the left part surrounding the stand legs and join
the two parts by screwing the screws into the holes on the back.(photo 2)
Unscrew the hexagonal nuts from the studs on the oven bottom (B photo 1) , insert each metallic band (A
photo 1) into the correct stud and screw all the nuts
photo 1 photo 2
Fasten the front part of the cover to the flat bar of conjunction placed between the two front stand legs
The terminals of the flat bar and the bottom of the frontal cover arch are provided of pre welded studs,
connect these points with the bar ending 45 degree cut .
The 45 degree terminal of the bar (A) is to be fastened to the cover , the terminal with straight ending (B) is
to be fastened to the flat bar . Screw with the provided hexagonal nuts mm. 17 (0.67 in)
photo 3 photo 4 photo 5
On the top and internally to the front arch of the cover two metal fins are welded, insert hexagonal head
screw mm. 13 (0.51 in) and screw well so to get perfect joint of the edges

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5.1 Installation of stand covering for MFL model
For such working below listed tools are required:
a) Spanner for hexagonal head screws 10 mm. (0.40 in)
b) Spanner for hexagonal head screws 13 mm. (0.51 in)
c) Spanner for hexagonal head screws 17 mm. (0.67 in)
Install the back paneling , it’s provided provided of some small holed metallic bands(photo 1) to fix at the
bottom of the oven with the furnished screws (Hex head self-threading screw mm. 10- 0.40 in)
photo 1 photo 2
Place the paneling getting the holes of the metallic bands and the holes of metallic ring underneath the oven
coincide between them (photo 2 previous page), to screw the provided screws. (Hex head self-threading
screw mm. 10- 0.40 in)
Once installed the back panel install the front panel that is provided of junction points like shown on photo 3
photo 3

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Install the front paneling getting its edges to coincide with the edges of the back panel already assembled
Match the hole of the point “1” (see photo above) with the holes of metallic ring underneath the oven and
screwing the provide screw (hex head self-threading screw mm. 10 – 0.40 in )
The paneling is provided of some studs on the top and on the sides (see point 2 and 5 photo 3) and the
same studs are welded on the internal side of the perimeter metallic ring underneath the oven and on the
sides of the back paneling.
Put the metallic bands into the studs (photo 4) and screwing the provided hexagonal nuts mm. 13 – 0.51 in
(photo 5)
photo 4 photo 5
Screw the stirrup with curved end (point “3” photo 6) to the iron tube of the oven stand (photo 7) using hex
head self-threading screw mm. 10 (0.40 in)
photo 6 photo 7

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Join the point 4 of the front stand cover (photo 8) to the stand using the metallic stirrup with 45 degrees end .
The stirrup side with 45 degree end must be fixed on the point 4 of the cover (photo 8) the other side with
straight end must be fixed to the prewelded screw on the junction band between the stand legs (photo 10 –
11)
For screwing use the provided hex nuts mm. 17 (0.67 in)
photo 8 photo 9
photo 10 photo 11

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Fasten the sides of the oven stand cover to the cross tubes of the same stand with the stirrup showed on the
photo 12
photo 12 photo 13
The curved end of the stirrup must be overlapped on the cross tube of the support stand (photo 13) , get
matched the hole existing on the stirrup and the hole existing on the tube then screwing with the provided
hex screw mm. 10 (0.40 in)
The opposite terminal of the stirrup must be overlapped and fastened to the stirrup existing on the stand
cover (point 6 photo below) using the provided hex head 13 mm (0.51 in) screw .
6) Installation of lateral marbles
Lateral marbles come into a separate package
Fasten the marbles on the metallic plate existing at the sides of the oven mouth using some silicone and
waiting complete drying before use them as support shelf

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7) Burner installation
7.1 Temperature probe
The electronic unit control comes fixed to the oven support stand, from the unit control run the electrical
cables and temperature probe.
The temperature probe “A” is inserted in a copper tube “B” .
Insert the probe through the copper tube placed under the oven until getting in the cooking room to a height
of around 1 cm (0.40 in). The probe must protrude not more than 1 cm from the oven floor.
Once placed the probe into the oven , connecting the part of the copper tube “B” that comes from the unit
control to the part “C” of the tube under the oven.
7.2 Burner.
Before installing the burner , check the correct position of the electrodes by following the below procedure :
photo 1 photo 2
Check that the burner electrode discharge the spark onto the edge of the “A” circumference of one of the
holes of the external series of the flame splitter .
IGNITION ELECTRODE - “B”
The tip "B" of the ignition electrode (taped in red) must be 3 mm from the surface of the flame splitter "A".
IGNITION ELECTRODE - “C”
The detection electrode "C" must be spaced 30 mm from the center of the flame splitter of the first flame.

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Connect the red cable with the red end and the black cable with the white end
VERY IMPORTANT: If the cables are connected in reverse position the burner will not start
The oven comes with nuts and spacers screwed on the pivots placed on the sides of the burner holes.
Unscrew the nuts leaving the spacers inserted and insert the burner in the hole under the oven making sure
the holes of the fixing flange (“A” photo 3) coincide with the existing pivots on the sides of the burner hole
(“B” photo 3)
To screw the nuts (hexagonal nut 13 mm (0.51 in) – “C” photo 3 ) until to fix strongly the burner
Make sure to place the supplied spacers between the bottom of the oven and the burner flange.
photo 3
The control panel complete of electrical cables and temperature probe (photo 4) is already installed on the
support stand of the oven
photo 4
Connect the burner to the control panel inserting the connectors A and B into the sockets placed on the
bottom of support plate of the control equipment (photo 5 next page)

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photo 5
Connect the gas to the gas inlet Ø1/2” of the burner (point C – photo 5) and the blue plug ( C photo 4) to a
CEI 220V. 16A. 50HZ. electrical socket.
When requested a transformer is provided for allowing the working of the burner with different voltage than
220 V . In this case the electrical cable isn’t provided of any blue plug (C photo 4) and it will be need
connect to the cable an appropriate plug can be inserted in the existing socket on the place of installing oven
Take care to not exchange phase - neutral connection
Electrical lines must be placed sufficiently spaced from the hot parts of the oven
INSTALLATION ROOM VENTILATION:
The room where the oven is installed must be equipped with a suitable air intake that cannot be closed or
tampered with ( windows and doors cannot be considered suitable air intakes).
Direct air intake:
- rectangular opening: 200 mm x 200 mm ( 8 in x 8 in)
- round opening: Ø 250 mm (10 in)
If there is an extractor hood in the room, you need to increase the air intake by considering the air amount
extracted from the hood (according to its label) and considering that the burner requires 30-40 m ³ of air per
hour during operation (17.66- 23.50 ft
3
/min) . If the air intake is too little, pressure variations are generated
and the burner may not work properly.
DRAUGHTS
The room must not have draughts that can cause malfunctions, such as an irregular flame or burner switch-
off: in the presence of draughts, that cannot be eliminated ( e.g. oven installed in a room with 2 windows
opposite each other) the base of the oven must be closed on three sides (right, left and back and the front
must remain open) so that the burner is protected from draughts without being isolated from the room where
it draws the air.
If the oven rests on a closed base, you need to create a minimum opening of 500 mm x 500 mm (20 in x 20
in) under the oven opening to ensure the correct amount of air reaches the burner.