BERTO'S 900 Serie Manual De Instrucciones página 61

- when using methane:
1. Ignite the burner and move the knob to the
minimum position.
2. Adjust the minimum flow rate with screw "B" (Fig.
7). Unscrew to increase the flow rate and tighten to
decrease it.
3. Once the flame is judged as suitable for a minimum
setting, check that it corresponds to the minimum
flow indicated in the "BURNERS" table. The check
must be carried out according to the "volumetric
method", described above, as follows:
4. Read the gas counter and, at the same time, start the
stopwatch.
5. After quite long time, for example 10 minutes, stop
the stopwatch and read the gas counter again.
6. Calculate how much gas has passed in 10 minutes
(the difference between the two readings), for
st
example 1 reading - 2
7. Now calculate the minimum power by applying the
volumetric method formula (previous paragraph).
Power (kw) = consumption (m
of methane.
8. If the power is less than the table value, loosen the
low flame screw again and check again.
9. If the power is higher than the table value, tighten
the low flame screw again and check again.
INSTRUCTIONS FOR USE
Before using the appliance, carefully clean the internal side
of the cooking tank.
Attention!
The cooking tank should be filled to a maximum level up
to 40 mm beneath the overflowing edge, following the
maximum level notch and with the food to be cooked
included.
Before filling the tank, check the drain faucet is closed.
Periodically clean the discharge valve, and grease it using a
specific food grade grease.
Indirect heating
Models with indirect heating are fitted with a cavity, and
once the connections have been made to the water and
electricity, a totally automatic system triggers to constantly
maintain the right amount of water in the cavity.
Should the water level in the cavity be too low for the
appliance to work safely, the red signal light (see fig. 9)
comes on, and blocks the main heating system to the pan.
Attention!
The red signal light (yellow on gas models) comes on for a
few seconds during normal functions, when the automatic
system is topping up the water.
The maximum steam pressure reached in the cavity is
0.5 bar; if large quantities of liquid are being heated, the
pressure could stabilize at much lower levels (0.2/0.3 bar).
To avoid excessive use and waste of water in the cavity, an
automatic pressure switch is fitted that limits the pressure
and directly turns off/on the main heating system.
nd
reading = 30 liters (0,03m
3
/h) for heating power
It is advisable to put soft water in the cavity.
Ignition of the pilot burner
Open the gas tap at the front of the appliance.
Rotate the thermostat knob to the left from position
" " to position " ". While keeping the thermostat knob
pressed, press the electric ignition button. Keep the
thermostat knob pressed in for few seconds after the
ignition. Release the thermostat knob and make sure that
the pilot burner is lit. If the pilot flame goes out, repeat the
operation.
By request, the unit can be equipped with an electric
ignition.
Ignition of the principal burner
After igniting the pilot flame, rotate the thermostat knob
3
).
to the left toward the highest setting until you reach the
position or rotate it further to the minimum setting .
When the thermostat knob is rotated to the right up to the
" ", position, the main burner is constantly off.
Switching off the pilot burner
To switch the pilot burner off, and prevent the main burner
from switching on, push in the thermostat knob and rotate
it to the " " position.
Autoclave operation
Before switching the unit on, close the lid and screw on
the 4 clamps.
Make sure the valve is in stand-by (see fig. 8 "A").
Start cooking at the highest setting. When stream starts
coming out from the valve, reduce the heating power.
Steam should come out continuously and lightly.
Now the valve is in the operating position (see fig. 8 "B").
Pressure in the cooking tank may reach a maximum value
of 0.05 bar.
After cooking, switch the unit off.
Before opening the lid, discharge the internal pressure
completely by activating the lever of the air valve (see
figure 8 "C").
Attention!
Do not leave the product in the tank at the end of cooking
with the lid hermetically closed for long periods. This could
damage the lid.
PART REPLACEMENT (SPARE PARTS)
Use only original spare parts supplied by the
manufacturer. The parts must be replaced solely by
authorized personnel!
Main burner nozzle (fig.4)
The nozzles can be reached after opening the lower front
panel. Use a SW 11 fixed wrench to unscrew nozzle "B" and
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