Smeg A3-7 Manual

							Instructions for the installer
93
11.2 Room ventilation and combustion extraction
The room containing the appliance should have a permanent air supply in
accordance with the standards in force. The room where the appliance is
installed must have enough air flow for the regular combustion of gas and for the
air exchange needed in the room itself. The air vents, protected by grills, must
be suitably dimensioned in compliance with current standards and positioned so
that no part of them is obstructed.
The appliance must be kept adequately ventilated in order to eliminate the heat
and humidity produced by cooking: in particular, after prolonged use, you are
recommended to open a window or to increase the speed of any fans.
Combustion products can be extracted by means of hoods connected to a
natural draught chimney whose efficiency is assured or via forced extraction. An
efficient extraction system requires precision planning by a specialist qualified in
this area and must comply with the positions and distances indicated by the
applicable standards. When the job is complete, the installer must issue a
certificate of conformity.
Extraction using a hood.
Extraction without a hood.
Single natural draught chimney.
Single chimney with extractor fan.
Directly outdoors with wall- or 
window-mounted extractor fan.
Directly outdoors through wall.
Air
Combustion products
Extractor fan 
						

							Instructions for the installer
94
11.3 Gas connection
At the end of the installation, check for any leaks with a soapy solution,
never with a flame.
The tightening torque between connections that incorporate a gasket must be
between 10 and 15 Nm.
After carrying out any operation on the appliance, check that the gas
connections are properly tightened.
If the appliance is fuelled by LPG, use a standards-compliant
pressure regulator and connect to the gas cylinder in accordance with
the standards in force.
Make sure that the feed pressure complies with the values indicated
in table “12.2 Burner and nozzle characteristics table”. 
						

							Instructions for the installer
95 11.3.1 Connection with a rubber hose
WARNING: The following instructions are valid solely for Class 1
installations. See fig. C in chapter “11.1 Installing in kitchen units”.
Connection using a rubber hose complying with current standards is only
permitted if the hose can be inspected along its entire length.
The inside diameter of the hose must be 8 mm for LPG GAS and 13 mm for
NATURAL GAS and CITY GAS.
Installation with a standards-compliant rubber hose must be
carried out so that the length of the piping does not exceed 1.5
metres; make sure that the hose does not come into contact with
moving parts and that it is not crushed in any way.
Verify that all following conditions are met:
 the hose is fixed to the hose connection with safety clamps;
 no part of the hose is in contact with hot walls (max. 50°C);
 the hose is not under traction or tension and has no kinks or
twists; 
 the hose is not in contact with sharp objects or sharp corners; 
 if the hose is not perfectly airtight and leaks gas, do not try to
repair it: verify that the hose is not past its expiry date
(serigraphed on the hose itself).
Make the connection to the gas mains using a rubber
hose whose specifications comply with current
standards (verify that the reference standard is
stamped on the hose).
Carefully screw the hose connector 3 to the
appliance’s gas connector 1 (1/2” thread ISO 228-1),
placing the seal 2 between them. The hose connector
4 can also be screwed to the hose connector 3,
depending on the diameter of the gas hose used. After having tightened the
hose connector(s), push the gas hose 6 onto the hose connector and secure it
with the clamp 5 that is compliant with the applicable standard.
32
1
4
3
6
5 
						

							Instructions for the installer
9611.3.2 Connection with a flexible steel hose
WARNING: The following instructions are valid for all types of installation,
see fig. A, B, C in chapter “11.1 Installing in kitchen units”.
Only use standards-compliant continuous wall steel hoses no longer than 2
metres.
This type of installation can be used for both built-in and free-
standing appliances.
Make the connection to the gas mains using a continuous wall
flexible steel hose whose specifications comply with the
applicable standard.
Carefully screw the connector 3 to the appliance’s gas connector
1 (1/2” thread ISO 228-1), placing the seal 2  between them.
11.3.3 Connection with a flexible steel hose with conical fitting (where
present)
WARNING: The following instructions are valid for all types of installation,
see fig. A, B, C in chapter “11.1 Installing in kitchen units”.
Only use standards-compliant continuous wall steel hoses no longer than 2
metres.
This type of installation can be used for both built-in and free-
standing appliances.
Make the connection to the gas mains using a continuous wall
flexible steel hose whose specifications comply with the
applicable standard.
Carefully screw the connector 3 to the appliance’s gas
connector 1 (½” thread ISO 228-1), placing the seal 2 between
them. Apply insulating material to the thread of the connector 3,
and then tighten the flexible steel hose 4 to the connector 3.
2
1
3
2
1
4
3 
						

							Instructions for the installer
97
11.4 Electrical connection
Make sure the voltage and the cross-section of the power supply line match the
specifications indicated on the identification plate positioned on the appliance.
Do not remove this plate for any reason. A copy of the plate is attached to the
instructions.
The appliance must be connected to the power supply by a qualified technician.
Before performing any operations, switch off the power supply to the appliance.
The appliance must be connected to earth in compliance with electrical system
safety standards.
Where the appliance is connected to the power grid via plug and socket, both of
these must be of the same type and connected to the power cable in
accordance with current standards. The socket must be accessible after the
appliance has been built in. 
NEVER UNPLUG BY PULLING ON THE CABLE.
Should the earthing wire need replacing it must be longer than the conducting
wires so that, if the plug is torn off the power cable, it is the last to be detached.
Avoid use of adapters and shunts as these could cause overheating and a risk
of burns.
If a fixed connection is being used, fit the power line with an omnipolar circuit
breaker with a contact opening gap equal to or greater than 3 mm, in an easily
accessible position close to the appliance.
The manufacturer declines all responsibility for damage to persons or things
caused by non-observance of the above prescriptions or by interference with
any part of the appliance. 
						

							Instructions for the installer
98
POSSIBLE 
CONNECTION TYPESCABLE TYPE
(if not present)
380 - 415 V 3N~5-pole5 x 1.5 mm² H05V2V2-F
380 - 415 V 2N~4-pole4 x 2.5 mm² H05V2V2-F
220 - 240 V 1N~3-pole3 x 4 mm² H05V2V2-F
 Use H05V2V2-F cables withstanding temperatures of 90°C or higher.
 The values indicated above refer to the cross-section of the internal conductor.
 The tightening torque of the screws of the terminal supply wires must be 1.5 - 2
Nm.
The aforementioned power cables are sized taking into account the coincidence
factor (in compliance with standard EN 60335-2-6). 
						

							Instructions for the installer
99
11.5 Positioning the skirt
WARNING: The skirt provided is an integral part of the product; it must be
fastened to the appliance prior to installation.
 Position the skirt above the top, taking care
to align holes A with holes B.
 Secure the skirt to the top by tightening
screws C.
11.6 Positioning and levelling the appliance
After making the electrical and/or gas connections, properly level
the appliance on the floor to ensure better stability. Screw or
unscrew the bottom part of the foot until the appliance is stable and
level on the floor.
11.7 Wall mounting instructions  (some markets only)
1 Fasten a hook bolt (not supplied) into the wall at
a height (h) of 800 mm from the floor.
The installer must provide the hook bolt when installing the appliance.
2 Attach the snap hook to the chain.
3 Attach the end of the chain to the hook bolt
fastened in the wall.
4 Finally, connect the snap hook to the appropriate
hole on the back of the appliance. 
						

							Instructions for the installer
100
12.ADAPTATION TO DIFFERENT TYPES OF GAS
BEFORE PERFORMING ANY OPERATIONS, SWITCH OFF THE POWER
SUPPLY TO THE APPLIANCE.
Appliance set for gas:NATURAL GAS G20 (2H) 20 mbar pressure
(see label on product)
In case of operation with other types of gas, the burner nozzles must be
changed and the minimum flame adjusted on the gas taps.
To change the nozzles, proceed as described in the following paragraphs.
12.1 Replacing the hob nozzles
1 Remove the pan stands, and
remove all burner caps and
flame-spreader crowns to
access the burner casings.
2 Unscrew the nozzles using a 7
mm socket wrench.
3 Replace the burner nozzles
according to the type of gas to
be used (see 12.2 Burner and
nozzle characteristics table).
4 Replace the burners in the correct position. 
						

							Instructions for the installer
101
12.2 Burner and nozzle characteristics table
For burner arrangement, see “Instructions for the user - 6.4 Cookware
diameters”.
Burner
Rated
heating
capacity
(kW)
Natural gas – G20 20 mbar
Nozzle diameter
1/100  mmReduced capacity
(W)
1Auxiliary1.0572400
2Semi-rapid1.897500
3Rapid3.0115800
4Ultra-rapid4.2135 + 751900
5Fish kettle burner1.994800
Burner
Rated
heating
capacity
(kW)
LPG – G30/G31 28/37 mbar
Nozzle
diameter
1/100  mmReduced 
capacity
(W)Capacity
g/h G30Capacity
g/h G31
1Auxiliary1.05504007675
2Semi-rapid1.865500131129
3Rapid3.085800218215
4Ultra-rapid4.291 + 461900305300
5Fish kettle burner1.968800138136 
						

							Instructions for the installer
102
12.3 Final operations
After replacing the nozzles, reposition the flame-spreader crowns, the burner
caps and the pan stands.
Following adjustment to a gas other than the one originally set in the factory,
replace the gas setting label fixed to the appliance with the one corresponding to
the new gas. The label is inserted inside the nozzle pack (where present).
12.3.1 Adjusting the minimum setting for natural gas
Light the burner and turn it to the minimum position. Extract
the gas tap knob and turn the adjustment screw next to the
tap rod (depending on the model) until the correct minimum
flame is achieved.
Refit the knob and verify that the burner flame is stable (when
turning the knob rapidly from the maximum to the minimum
position the flame must not go out). Repeat the operation on
all the gas taps.
12.3.2 Adjusting the minimum setting for LPG
In order to adjust the minimum setting with LPG, the screw at the side of the tap
rod must be tightened clockwise all the way.