FONTANA FORNI Napoli 6050 Hybrid Ovens Instruction Manual

REV-1.0 (12/2023) FFUSA
Natural Gas Conversion instructions
for NAPOLI, FIRENZE & ROMA ovens

Napoli 6050 Hybrid Ovens

WARNING!
FIRE, EXPLOSION, AND CARBON-MONOXIDE HAZARD
If the information in these instructions is not followed exactly, a fire, explosion, or production of carbon monoxide may result causing property damage, personal injury, or loss of life.
This conversion kit should be installed by a qualified agency in accordance with the appliance manufacturer’s instructions and all applicable codes and requirements of the Authority Having Jurisdiction. The qualified agency is responsible for the proper  installation of this kit. The installation is not proper and complete until the operation of the converted appliance is checked as specified in the manufacturer’s instructions.

The Napoli, Firenze & Roma ovens are set up for LP use by default. However, conversion to Natural Gas (NG) is possible with the use of this kit.

This kit includes:

1. Threaded NG adapter G1/2-NPT 3/8
2. Sealing washer
3. Pilot flame nozzle (only for Firenze and Roma ovens)
4. NG Orifice
5. NG Regulator
6. NG hose
7. NG Quick Connect

Before commencing the conversion, securely close and disconnect the LPG bottle, storing it in a suitable location in accordance with local regulations.
Ensure the surrounding area is clear of flammable or combustible materials.

Refrain from smoking during the conversion process.

After disconnecting the LPG line, remove the 3/8 SAE connector and its sealing washer. Replace it with the adapter (1) and the new sealing washer (2) provided in the kit.

To ensure proper operation, it is essential to replace the orifice with one designed for use with natural gas (NG), as provided in the kit:

The size is stamped near the hole on the orifice. Replace the orifice with the one supplied and suitable for your oven.

Orifice Replacement

1 – Remove the gas knob
To remove the throttle grip (A) just pull it applying a slight force.Follow the direction of the arrow.

2 – Remove the screw
Remove the screw (B) indicated in photo.

3 – Remove the protective cover
To remove the protective cover (C) fixed to the rear of the oven, simply remove the screws shown in the photo.

4 – Disconnect the ignition wires
Disconnect the two red ignition wires.

5 – Unlock the burner
To unlock the burner (D), simply remove the screws shown in the photo.

6 – Extract the burner
Now extract the burner being careful not to damage the ignition wires.

7 – Remove the cover plate
Unscrew the fixing screw (E) andremove the cover plate (F) of the primary nozzle.

8 – Identify the orifice to replace
Once the cover plate has been removed, you will be able to identify the primary orifice (G) which must be replaced.

9 – Replace the primary orifice
Unscrew the primary orifice (G) from the nozzle holder (H) using a 13 mm wrench. Then install (screw in) the new nozzle.
During this operation, the nozzle holder (H) must be blocked to prevent rotation.

PILOT NOZZLE REPLACEMENT

(only for Firenze (6070) and Roma (8070) ovens)

10 – Identify the pilot nozzle
The pilot nozzle is inside the pilot burner and is precisely located in the fitting (I) located in the centerwhere the gas supply hose (L) is connected as shown in the photo

11 – Remove the fitting
Completely unscrew the fitting (I) using a 10 mm wrench.

12 – Extract the hose
Extract the hose (L) and thefitting (I).

13 – Replace the pilot nozzle
Once the hose (L) has been removed you will be able to identify the pilot nozzle (M) which will need to be replaced.
Replace the pilot nozzle with the one supplied.

14 – Reinsert the burner
All that remains is to repeat the procedure in reverse order to reinsert the burner into the oven.
At the first ignition, check for anleaks.

IDLE ADJUSTMENT

You should only need to make adjustments in the event of a conversion – your oven has already been configured correctly during the manufacturing process. The correct minimum settings are outlined below.

15 – Remove the gas knob
To remove the throttle grip (A) just pull it applying a slight force.
Follow the direction of the arrow.

16 – Locate the adjustment screw
Looking inside the opening indicated, there is the minimum adjustment screw (N) installed in the body of the gas cock.

17 – Adjust the minimum
Using a slotted screwdriver, turn the screw to adjust the minimumaccording to the settings as indicated in the table below.

Napoli (6050)
Nominal input rating: 54500 Btu/hr [LP/NG] Reduced rate: 16000 Btu/hr [LP/NG] LP – 11” w.c.
Ø injector = 2.25 mm
By-pass screw adjustment: Fully closed position
NG – 4” w.c.
Ø injector = 3.70 mm
By-pass screw adjustment (number of turns anticlockwise from fully closed position): 1.5

Firenze (6070)
Nominal input rating: 68000 Btu/hr [LP/NG] Reduced rate: 16500 Btu/hr [LP/NG] LP – 11” w.c.
Ø injector = 2.40 mm
Ø pilot injector = 1×0.22 mm
By-pass screw adjustment: Fully closed position
NG – 4” w.c.
Ø injector = 4.20 mm
Ø pilot injector = 2×0.29 mm
By-pass screw adjustment (number of turns anticlockwise from fully closed position): 0.8

Roma (8070)
Nominal input rating: 75000 Btu/hr [LP/NG] Reduced rate: 16500 Btu/hr [LP/NG] LP – 11” w.c.
Ø injector = 2.60 mm
Ø pilot injector = 1×0.22 mm
By-pass screw adjustment: Fully closed position
NG – 4” w.c.
Ø injector = 4.60 mm
Ø pilot injector = 2×0.29 mm
By-pass screw adjustment (number of turns anticlockwise from fully closed position): 0.9

After the conversion

Once the gas smoker oven has been converted to Natural Gas it is the responsibility of the individual or agency performing the conversion to update the data plate on the back of the oven.
This can be done with a sticker or permanent marker.

The same information must also be completed below to have a signed copy in case the plate on the back of the oven gets damaged.

The NG Regulator, NG Hose and NG Quick Connect are connected as shown below.

6| 19| NG Regulator (Optional)| Maxitrol| RV2OLF| 1/2 PSIG max inlet. 4.0″wc outlet, with ventlimiter. 3/8″NPT x 3/8″ NPT| cCSAus
---|---|---|---|---|---|---
6| 20| NG Hose (Optional)| M.B. Sturgis Inc.| DG-3874| Strip wound hose 3/8″ID. with 3/8″ CSN (M) plug x 3/8.. (F) SAE (gas flare) swivel fitting. 5 psi max.  Suitable for outdoor use 120in| cCSAus
Tejas Smokers| 100LP484| cCSAus
length.
6| 21| Quick Disconnect (Optional)| M B Sturgis Inc.| 375| 3/8″ID quick disconnect female Socket x 3/r (F) NPT. 0.5 psi max.| cCSAus
Tejas Smokers| 104MB001| cCSAus

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