Zanussi Electrolux Gas hobs Manuel de service télécharger pdf (Page 13)

4. START-UP

4.1 CHECKING THE NOMINAL HEAT INPUT

The nominal heat input of the appliance must be checked by an

authorized installer or the local gas supply authority in accord-

ance with the instructions shown below, for the installation of

new appliances, conversion of existing appliances to a different

gas supply and servicing.

The heat input cannot be readjusted after this check.

Heat input:

burner ø100

Gas oven

MAX MIN.

5,5 kW 1,35 kW

8,5 kW 2,5 kW

The appliance's maximum and minimum heating settings are

obtained by measuring the correct inlet pressure and by making

sure that the injectors used correspond to the application in

question. The instructions for these checks are indicated below.

Once the minimum and maximum heating settings have been

checked, test the operation of the appliance in accordance with

the instructions shown in paragraph 7.

4.2. CHECKING THE GAS INLET PRESSURE (Fig. 4)

Check whether the appliance is compatible with the type of gas

supplied according to what is indicated on the data plate. If it

does not correspond, follow the instructions in the paragraph

"Adaptation to a different type of gas".

The pressure regulator have to set at 4" w.c. (10mbar) for natural gas

and 10" w.c. (25mbar) for propane gas. To check the manifold pressure:

1) Turn all thermostats and burner valves to OFF position.

2) Turn main gas valve to entire unit OFF.

3) Remove knobs, control panel and locate 1/8" plug in manifold.

4) Remove plug and install a fitting appropriate to connect a

pressure gauge.

5) Turn on main gas to unit and light pilots.

6) Turn all burners and ovens (where present) to full ON position

and read pressure gauge, then read the pressure value indicated

by the gauge (to start pilot flame and burners see paragraph 2.1

of part IV "Instructions for the use").

7) If the pressure of the connection is more or less than expected

values as in the following table, inform immediately your gas

company, then set the inlet pressure (acting on the pressure

regulator "B" - fig. 4) as indicated in in 8, 9 and 10 steps.

Never switch on the appliance before checking that the pressure

is at the nominal suitable value in chart below.

If the pressure is already on the nominal value, go directly to the step 11.

8) Remove cap from top of regulator.

9) With a screwdriver rotate regulator adjustment screw

"clockwise" to increase, or "counterclockwise" to decrease,

pressure until pressure gauge shows correct reading.

10) Replace cap of regulator.

11) Repeat step 1 and 2.

12) Remove pressure gauge fitting and replace plug in manifold.

13) Replace valve panels.

Type of gas Pressure mbar

G20 natural gas

L.P.G. G30/G31

Norm. Min. Max

20 17 25

28-30/37 20/25 35/45

Once the inlet pressure has been checked, remove the pressure

gauge and tighten the sealed bolt.

5. CONVERSION TO DIFFERENT

TYPES OF GAS

For conversion to a different gas supply, refer to the injector table

below and proceed as follows:

- Remove the control panel.

5.1 REPLACEMENT OF THE HOB MAIN BURNER

INJECTOR (fig. 5)

• Slacken screw "D", slide air inlet sleeve "C" up as far as it will

go and fix with screw "D".

• Unscrew injector "B" using a straight box end wrench model

12x13 UNI 6739 - ISO 3318 - DIN 837 with 12 mm reach and

replace with a version according to the type of gas used, in

accordance with the specifications in the table 2 below.

• The injector diameter is indicated in hundredths of millimetres

on the injector body.

5.2 REPLACEMENT OF THE HOB MINIMUM SUPPLY

INJECTOR. (fig. 7)

• Slacken minimum supply adjustment screw "B" on the cock and

replace with one corresponding to the gas supply used (tighten

fully down).

5.3 CHECKING THE HOB PRIMARY AIR (fig. 5)

The primary air flow rate is correct when the flame does not

detach when the burner is cold or backfire when the burner is hot.

To adjust the primary air flow rate, proceed as follows:

• Slacken fixing screw "D" and adjust sleeve "C" to distance "H"

as indicated in the table 2 below.

• Retighten fixing screw "D".

5.4 REPLACEMENT OF THE OVEN MAIN BURNER

INJECTOR (fig. 6)

• Remove the oven base.

• Slacken screw "A" and unscrew injector "C".

• Remove the injector and aerator.

• Replace injector "C" with one corresponding to the type of gas

used, as indicated in the table below.

• The injector diameter is indicated in hundredths of millimetres

on the injector body.

• Fit injector "C" in aerator "B" and return the assembled unit to

its housing. Firmly tighten the injector and screw "A".

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Zanussi Electrolux Gas hobs Manuel de service Page 13

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