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- Gas supply connection should be performed by means of metal piping of an appropriate cross section and an approved
shutoff cock should be fitted at source.
- Having connected the gas supply, you should make sure no leaks exist at the joints by checking with bubble soap.
2.7.1
DISCHARGE OF EXHAUST FLUE PRODUCTS.
The units should be installed in premises suitable for the discharge of flue products, which must occur in compliance with the
installation instructions. Our equipment (see Table 1.1 for technical data) is classified as:
GAS UNITS TYPE A
They are not suitable to be connected to a flue discharge control. The gas unit should be positioned beneath a draft hood with
its system complying with the Regulations. (This unit needs at least 2cu.m/hr • kW T.C. (Thermal Capacity).
Check kitchen ventilation: it should by complying with the Regulations in force.
2.7.2
HOW TO ACHIEVE THE NOMINAL THERMAL CAPACITY
Check whether the unit is fitted for the gas type, pressure and category corresponding with the main gas supply.
Indication shown on packing and/or the label of the unit.
If the unit is fitted for another gas type or pressure, you need to first effect a change over to the other gas type.
See Table II for the nozzle, the idle screw (bypass), the primary air regulation, (X mm), the pilot nozzle and the nozzle pressure
for the main burner.
N.B.: The names of nozzles "2H" and "3+" are shown on the left side of Table II.
2H= G20 - 20mbar
3+= G30 - 29mbar and/or G31 - 37mbar coupled gas and pressure.
In our sector, we almost always have to deal with G31 - 37mbar!
Table II shows the types of gas and pressure for all burners and respective nozzles, the X mm distance for the adjustment of
primary air , the idle screw (bypass), the pilot nozzle, the maximum and minimum pressure at nozzle, the maximum and
minimum thermal capacity, and the gas consumption in l/hr (15°C) or in g/hr in the case of L.P.G.
Attention: If the incoming gas' "dynamic" pressure to the unit is lower than the minimum pressure on Table II, connection is
prohibited; furthermore, the fitter should notify the gas Company that the supply pressure is too low.
N.B.: Should the pressure vary more to than +10% of the nominal pressure, e.g. for G20 - 22mbar, it is advisable to mount a
pressure regulator ahead of the unit in order to guarantee the nominal pressure.
Should the supply pressure exceed the maximum pressure on Table II, e.g. for G20 - 25mbar, notify the gas Company.
Make sure the inlet and nozzle pressures agrees with the values shown on Table II.
2.7.3
PRESSURE CHECK
INCOMING PRESSURE CHECK (Pe) Fig. 1
Check the inlet pressure with a manometer (0¸80mbar w.g. accuracy at least 0,1 mbar).
Unscrew the screw (A) of the pressure test nipple (B).
Connect a silicone rubber tube to the manometer and or the test nippel (B) light on the pilot and mean burner and check the
dynamic inlet pressure.
Tight screw (A) with the washer (C) for the gas soundness.
Check Gas leak with a soapsolution; never with a lighted match.
NOZZLE PRESSURE CHECK (Pi) Fig. 1
In order to check the pressure tube of the nozzle (Pos 6), loosen the screw (E).
2.7.4
LIQUID GAS OPERATION CONTROL
Check whether the fitted nozzles comply with the indications on Table II.
Check whether the incoming pressure complies with the indications on Table II.
Make sure that the L.P.G. gas system has two pressure regulators of suitable capacity and that the evaporation capacity is
sufficient. See also the publication "Installation Regulations and Characteristics of L.P.G. Systems".
2.7.5
OPERATION CONTROL
- Startup your cooker in according to the instructions of Chapter 5.
- Carry check for no gas leak occured on reason of installation work. Do it in according to local prescriptions.
- Check pilot flam lighting and iginition of the mean burner.
- Check exhausts regular conveyance outdoor.
- Place a sticker for record of adjustment data given to your coocker. This will turn into appreciable advantage given to the
technicians who shall take care of your appliance on accasion of maintenance or of repairs.
2.8
ELECTRICAL CONNECTION
Electrical connection should be performed in compliance with the IEC regulations, only by authorised and competent
- 19 -
GB
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