5 - SET-UP FOR OPERATION
5.1.9 Operator training
• Explain and show the user how the machine works according to
the instructions, and hand him this manual.
• Remind the user that any structural alterations or any building
modification or renovation may affect the combustion air supply,
thus requiring a second operation check.
5.1.10 Conversion and adjustment
To change over form one kind of gas to another, for example from
methane to liquid gas, or to another type of gas, the use of suitable
nozzles for the main burner is required, in accordance with the table
"TECHNICAL DATA".
The nozzles of the main burners and pilot for different types of gas,
marked with the relative diameter in hundredths of mm, are in an
envelope which is provided with the appliance. After transforma-
tion or adaptation, carry out operating checks as described in para-
graph 5.1.8, "Operation control."
5.1.11 Replacing burner nozzles (Fig. 1)
To replace the nozzle (1): remove the grill, the burner cover, the
burner body and the tray of the top.
Then unscrew the screws (2) which fasten the primary air bushing
and replace the nozzle (1). See the table "TECHNICAL DATA".
Once the suitable nozzle has been installed, adjust the distance of
the primary air and fasten the bushing with the appropriate screw.
See the table "TECHNICAL DATA".
5.1.12 Setting reduced capacity power (Fig. 1)
The minimum setting screw (5) should be adjusted as follows:
• for operation with LPG it should be screwed all the way down;
• for operation with methane, use the gas flow table to check the
value in l/min with respect to the operating alorific value (meas-
urement in accordance with the volumetric method). Start the
appliance in accordance with the instructions. Turn the knob to
the minimum position and use screw (5) to adjust the flow (clock-
wise = flow reduction; conter-clockwise = flow increase).
5.1.13 Replacement of pilot nozzle, open flames (Fig. 1)
Remove the grill and the tray of the top. Remove the plug (11) and
use a screwdriver to unscrew and replace the nozzle (12). See the
table "TECHNICAL DATA".
Replace the closing screw (11) and the relative seal (13).
5.1.14 Replacement of pilot nozzle for gas oven GN 2/1
(Fig. 2A)
Remove the front/lower panel by removing the fastening screws.
Remove the closure (11). Use a screwdriver to unscrew and replace
the nozzle (12) (see table, "TECHNICAL DATA").
When finished, replace the closing screw (11) and the relative seal (13).
5.1.15 Replacement of pilot nozzle for gas oven MAXI
(Fig. 2C)
After opening the oven door, remove the protection from the nozzle
zone, remove the nut (11), slide out the bicone (13) and the injector (12).
Replace the injector (12), see the table "TECHNICAL DATA", and
replace all parts in reverse order.
5.1.16 Replacement of pilot nozzle for gas oven GN 2/1
(Fig. 2A)
Remove the lower panel as previously described. Remove the fas-
tening screw (2) of the primary air bushing (4) and push the bushing
into the venturi tube. The nozzle (3) is now easily accessible.
After substituting the nozzle based on the type of gas and the tech-
nical data, reassemble everything and adjust the distance "A" of the
primary air. See the table "TECHNICAL DATA".
5.1.17 Replacement of nozzle of gas oven GN 1/1 (Fig.
2B) and gas oven MAXI (Fig. 2C)
After opening the door, remove the grill, the grill supports and the
stainless steel bottom, then unscrew the protection form the nozzle
zone.
Remove the air adjustment by unscrewing screw (2). The nozzle is
now accessible. Replace it with one that is suitable for the type of
gas to be used. See the table "TECHNICAL DATA". After replace-
ment, reassemble everything and perform air adjustment (see the
table "TECHNICAL DATA").
5.2 Maintenance
Attention! Before doing any repair or maintenance
work, unplug the appliance.
The following maintenance program should be carried out at least
once a year:
• Check that all the safety and adjustment devices are working
properly;
• Check that the burners are working properly with regard to:
- ignition
- combustion safety;
Check functioning of the appliance as described in paragraph
"Operation Control";
If it should be necessary to clean the open flame burners, proceed
as follows:
• Clean the grills, covers and bodies of the burners;
• Clean the parts with water and detergent and an appropriate
tool. Rinse and dry.
When reassembling the parts, make sure you place them back in the
right position.
If it is necessary to clean the oven burner (18) (Fig. 2A/2B/2C), pro-
ceed as follows:
• Loosen the screw (2), run the air adjustment into the venturi
tube and remove it, unscrew the injector (3) and the nut or
screw (9).
•
Unscrew the fastening screw (19) (Fig. 2A) of the burner and
remove it;
• Carefully clean all the holes of the burner with the aid of a tip
of a suitable size;
• Check that the smoke discharge is clear.
• Reinstall everything in reverse order.
5.3 Replacing parts
All parts must be replaced by authorized technicians
only!
To replace the following parts first remove all the control knobs and
control panel (after loosening the fixing screws), then extract the
ignition wire.
5.3.1 Open flame gas valve (Fig. 1 – Pos. 4)
Loosen the fitting of the pipes (6) and (9) of the gas and of the
thermocouple (8), loosen the fitting (7) for the fastening of the
valve on the ramp and replace the piece.
5.3.2 Open flame thermocouple (Fig. 1 – Pos. 14)
Loosen the nut (8) for fastening the thermocouple on the valve and
on the burner (17) and replace the piece (14).
020_03
- GAS KITCHENS
14
· 23
03/2006
