Casa EFH 3970 TN VSB User manual

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LICITY
BUILT-IN GAS HOB
BATTERY IGNITION
Model:
EFH 3970 TN VSB
EFH 3971 TN VSB
EFH 3762 TN VSB
EFH 3763 TN VSB
EFH 2760 TN VSB
THE BEAUTY OF SIMPLICITY
USER MANUAL

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Congratulations on choosing appliance, which you will find is dependable and easy to use.We recommend that
you read this manual for best performance and to extend the life of your appliance. Thank you.
Close-up View
1. Auxiliary burner
2. Semi-rapid burner
3. Rapid burner
4. Triple ring burner
5. Control Knobs for Gas Burners and Electric Hot Plates
6. Igniter for Gas Burners (only on certain models)
7. Safety Device (only on certain models) - Activates if the flame
accidentally goes out (spills, drafts, etc.), interrupting the delivery of
gas to the burner.
NOTICE
The stainless steel grease pan and the cast-iron grill, located in the burner and grate packing box, must be
installed, respectively, below and above the electric heating element so that tile element is enclosed between
the two.
How To Use Your Appliance
The position of the corresponding gas burner is indicated on each control knob.
GAS BURNERS
The burners differ in size and power. Choose the most appropriate one for the diameter of the cookware being
used.
The burner can be regulated with the corresponding control knob by using one of tile following settings:
OFF
High
Low

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IGNITING THE BURNERS
Both models come with auto ignition and the safety device. Proceed as follows to ignite the burner：
1) Turn the chosen knob in anti-clockwise direction to the “High” setting.
2) Push in and hold the knob for 3 to 5 seconds to light the gas and to permit the thermocouple to heat up.
3) Release the knob after 3 to 5 seconds and adjust the flame as desired. Repeat points 1 and 2 if the
flame cannot be lighted.
Caution: If the burner accidently goes out, the safety valve will automatically cut out the gas flow. To re-light
the burner, turn the control knob back to “OFF” setting and try to re-light again after waiting for at least I minute.
Turn off a burner, turn the knob in the clockwise direction until it stops (it should be on the "." setting).
BATTERY IGNITION
If the auto ignition does not work, make sure that the battery, installed at the back of the cooker, is not flat and
has been installed correctly.
CHOSE OF THE BURNERS
For greater efficiency and lesser gas consumption, use the pots and pans with the right
diameters of the burners. Avoid having flames extending out from underneath the pans (refer to
the table). A smaller diameter pot or pan placed on a larger burner does not necessarily mean
that the boiling conditions are reach quicker.
Table of recommended pans
Burner
Ø Pan diameter in cm
Auxiliary
Semi rapid
Rapid
Triple ring
from dia. 8 to dia. 14
from dia. 14 to dia. 20
from dia. 20 to dia. 28
Above dia. 26
AUTOMATIC SAFETY VALVES
This safety device automatically closes the gas valve if the inconvenience caused by failure to comply with this
rule.
Cleaning and Maintenance
Cleaning and maintenance should be carried out after the appliance has turned cold especially when cleaning
the enameled parts. Avoid leaving alkaline or acid substances (lemon juice, vinegar etc.) on the surfaces.
Avoid using acid or chlorine-based cleaning products.
To extend the life of the cooktop, it is absolutely indispensable that the appliance be
cleaned carefully and thoroughly on a frequent basis, keeping in mind the following:
ENAMELLED PARTS,All of the enameled parts must be washed only with a sponge and soapy water or
with non-abrasive products

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BURNERS AND GRIDS These parts can be removed and cleaned with appropriate products. After
cleaning the burners and their flame distributors must be well dried and correctly replaced. It is very
important to check that the burner flame distributor F and the cap Chas been correctly positioned ( fig. 1)
-failure to do so can cause serious problems. Check that the electrode “S” (fig.1) is always clean to ensure
trouble-free sparking. Check that the probe” T” (fig.1) is always clean to ensure correct operation of the
safety valves (for models with safety device).
The electric hobs should be cleaned using a damp cloth and then rubbed with oil while still warm;
STAINLESS STEEL can be stained if it remains in contact with highly calcareous water or aggressive
detergents (containing phosphorous) for an extended period of time, it is recommended that these parts
be rinsed thoroughly with water and then dried well, It is also a good idea to clean up any spills.
Note: regular use could cause discoloring around the burners due to high flame temperature.
Both the probe and ignition plug must be very carefully cleaned
●GAS TAPS
Periodic lubrication of the gas taps must be carried out by specialist personnel only. In the event of operating
faults in the gas taps, call the Service Department.
GENERAL ADVICE
√When the appliance is not being used; it is advisable to keep the gas tap closed.
√If the gas tap becomes stiff, it is necessary to dismount it accurately, clean it with gasoline and spread a
bit of special grease resistant to high temperatures on it. This operation must be executed by a qualified
technician.

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TRIPLE RING BURNER
The triple ring burner must be correctly positioned (seen fig.2); the burner rib must be entered in their lodgment
as shown by the arrow. The burner correctly positioned must not rotate (fig.3).
Then position the cap A and the ring B (fig.3).
CLEANING THE TRIPLE RING BURNER
Pay special attention to this burner: the four holes around the outside of the crown must always be kept clean.
When cleaning, remove the flame divider (fig.4) and use a cotton bud, toothbrush or some other item to clean
out any incrustations or dirt from the four holes marked “H” (fig.5). This procedure is necessary to ensure the
burner functions correctly.
Greasing the Gas Valves
Over time, the gas valves may become difficult to turn. If this is the case, the inside of the valve must be
cleaned and grease.
N.B.: This procedure must be performed by a technician authorized by the manufacturer.

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Advice for the Installer
IMPORTANT:
The appliance should be installed, regulated and adapted to function with other types of gas by a
QUALIFIED INSTALLATION TECHNICIAN.
Failure to comply with this condition will render the guarantee invalid.
The appliance must be installed in compliance with regulations in force in your country and in observation
of the manufacturer’s instructions.
Always unplug the appliance before carrying out any maintenance operations or repairs.
Some appliances are supplied with a protective film on steel and aluminum parts. This film must be
removed before using the cooker.
The walls of the units must not be higher than work top and must be capable of resisting temperatures of
75°C above temperature.
Do not install the appliance near inflammable materials (eg.curtains).
TECHNICAL INFORMATION
The cooktops are designed to be embedded into kitchen fixtures measuring 600 mm in depth.
In order to install the cook top into the kitchen fixture, a hole with the dimensions shown at the cutting size
board has to be made, keeping in consideration the following:
√within the fixture, between the bottom side of the cooker top and the upper surface of any other
appliance or internal shelf there must be a clearance of at least 30 mm;
√the cooker top must be kept no less than 100 mm away from any side wall;
√the hob must be installed at least 50mm away from the rear wall.
√there must be a distance of at least 650 mm between the hob and any wall cupboard or extractor hood
positioned immediately above(fig.6).
√It is essential to install a heat baffle between the bottom of the hob and the underlying unit.
fig.6

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INSTALLATION IN KITCHEN CABINET WITH DOOR (fig.7)
The fixture has to be made according to specific requirements in order to prevent the gas burners from going
out, even when the flame is turned down to minimum, due to pressure changes while opening or closing the
cupboard doors. It is recommended that a 30 mm clearance be left between the cooker top and the fixture
surface (fig.7 ).
CHOOSING SUITABLE SURROUNDINGS
The room where the gas appliance is to be installed must have a natural flow of air so that the gas can burn.
The flow of air must come directly from one or more openings made in the out-side walls with a free area of at
least 100c㎡. If the appliance does not have a no-flame safety device this opening must have an area of at
least 200c㎡. The openings should be near the floor and preferably on the side opposite the exhaust for
combustion products and must be so made that they cannot be blocked from either the outside or the inside.
When these openings cannot be made the necessary air can come from an adjacent room which is ventilated
as required, as long as it is not a bedroom or a dangerous area. In this case the kitchen door must allow the
passage of the air.
DISCHARGING PRODUCTS OF COMBUSTION
Extractor hoods connected directly to the outside must be provided, to allow the products of combustion of the
gas appliance to be discharged (fig.8). If this is not possible, an electric fan may be used, attached to the
external wall or the window; the fan should have a capacity to circulate air at an hourly rate of 3-5 times the
total volume of the kitchen (fig.9). The fan can only be installed if the room has suitable vents to allow air to
enter, as described under the heading “Installation room”

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SETTLING UP THE HOB FOR INSTALLATION
Every cooker top is provided with a set of tabs for fitting to the fixture panel with thickness from 30mm to 40mm
and a seal with adhesive on one side.
-Remove burners and grids.
-Turn the cooker top over and rest the glass side on a cloth.
- Place the battery in the battery compartment.
-Apply the self-adhesive seal “G” as illustrated in fig.10.
-Slot the cooker top into the unit and position.
-Position the cooker top in the recess and secure by means of the brackets as shown in fig.11(for 3 or 4
cm thick work top).
CUT-OUT DIMENSION
Different models cut-out dimension are different, make sure use the correct dimension to installation.
Model Cut Out Dimension(mm)
EFH 3970 TN VSB 722-840 x 428-480
EFH 3971 TN VSB 722-840 x 428-480
EFH 3762 TN VSB 660-750 x 360-420
EFH 3763 TN VSB 660-750 x 360-420
EFH 2760 TN VSB 660-750 x 360-420
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G
AS SECTION
TYPES OF GASES
The gases normally used may be grouped, in view of their features in three families:
- L.P.G.(in cylinders) G30
- NATURAL GAS(methane) G20
- City Gas G110
Adapting the Cooktop for DifferentTypes of Gas [Table1]
Burners and Nozzle Specifications
G20 G30 G110
Burner Thermal power
(kW)
Nozzle
1/100
(mm)
Thermal power
kW
Nozzle 1/100
(mm)
Nozzle 1/100
(mm)
Nozzle 1/100
(mm)
Thermal power
kW
Nozzle 1/100
(mm)
Auxiliary (Small)
(A) 0.90 69 0.90 50 44 43 0.9 1.5
Semi rapid
(Medium) 1.88 97 1.88 68 64 60 1.88 1.7
Rapid (R) 2.40 110 2.40 78 72 68 2.4 2.4
Triple Ring (TR) 3.40 123 3.40 91 86 83 3.4 2.6
Triple-ring
(BSI burner) 2.65 124 2.65 84 78 70 NA NA
Triple Ring (Tinon
burner) 3.00 131 3.00 86 82 75 NA NA
Supply pressures 20mbar 30
mbar
36
mbar
50
mbar 1mbar
Table1
At 15°C and 1013 mbar-dry gas
P.C.I.G20 37.78 MJ/m³ P.C.I.G25.1 32.51 MJ/m³
P.C.I.G25 32.49 MJ/m³ P.C.I.G27 30.98 MJ/m³
P.C.I.G2.350 27.20MJ/ m³ P.C.I.G30 49.47MJ/Kg
IMPORTANT: By default, the hob comes with nozzles suitable for LPG
The appliance should be installed, regulated and adapted to function with other types of gas by a QUALIFIED
INSTALLATION TECHNICIAN.

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INSTALLATION
The appliance is predisposed and adjusted to operate with the gas indicated on the specifications plate applied
onto the appliance.
If the appliance must be operated with a gas different than that indicated on the plate, it is necessary to execute
the following operations:
-replacement of the injectors
-regulating of the minimum
GAS CONNECTION FOR GAS HOB
The Cooker should be connected to the gas-supply by licensed installer. During installation of this product it is
essential to fit an approved gas tap to isolate the supply from the appliance for the convenience of any
subsequent removal or servicing. Connection of the appliance to the gas mains or liquid gas must be carried
out according to the prescribed regulation in force, and only after it is ascertained that it is adaptable to the type
of gas to be used. If not, follow the instructions indicated in the paragraph headed "Adaptation to different gas
types". In the case of connection to liquid gas, by tank, use pressure regulators that conform to the regulation
in force.
IMPORTANT: For safety, for the correct regulation of gas use and long life of the appliance, ensure that the
gas pressure conforms to the indications given in table 1 "Nozzle and burner characteristics".
ORIENTATION OF THE ELBOW
The appliance is supplied with a gas connection oriented towards the centre of the cooking hob. The
connection to the gas supply must be effected only from this side or in vertical position by turning the elbow
downwards. To turn the elbow, follow these operations:
√Loosen the nut √Turn the elbow √Lock the nut √Make sure there is no leakage by a soapy solution.