Electrolux Professional A7FTEDCSI0, Руководство по обслуживанию

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FRY TOP 700/900 EL/GAS
FUNCTIONING OF THE FLAME FAILURE DEVICE / MAGNETIC VALVE COIL
4.2.1.2.1 MODULATING & ON/OFF
The " Minimum screw - Modulating or ON/OFF function" access port , see the picture of § GAS VALVE ,is
a screw, this screw acts as the "minimum" flow to the main burner. The screw is normally set by the factory in
an
ON/OFF mode, this means that in the factory the screw is completley tightened (turned clock wise till the
end).
How does
ON/OFF mode work?
Conditions are: The minimum screw § GAS VALVE is completely tightened (all in / turn clockwise). When the
appliance is in function the valve will output "max power", once that the valve senses the set point temperature
it will close (OFF) the gas supply to the burner / once that the valve senses that the temperature is cooling (out
of set pont) then it will turn ON the gas supply to the burner in "max power" . This is called
ON/OFF function.
How does
Modulating work?
Conditions are: The minimum screw § GAS VALVE , is loosened two and a half turns upwards from the end.
Only if loosened then the modulating function will be active!!
When the appliance is in function the valve will output max power, once that the valve senses that the set point
temperature is getting near it will close (OFF) the "max power"gas supply to the burner but a minimum amount
of gas will continue to supply the main burner. The minimum gas is supplied through the minimum screw that
therfore will keep present a small flame on the burner.
The final set point temeprature will be gained trhough the main burner with "minimum power" / once that the
valve senses that the temperature is cooling (out of set pont) then it will turn ON the gas supply to the burner
but depending if the cooling curve is high or small the rearming of the burner could be granted with a "max
power" or "minimum" function. This is called
Modulating.
Gas
flow
Gas
flow
Gas
flow
Gas
flow
STAGE 1:
Appliance is gas
supplied,
pilot
turned off.
STAGE 2:
Press the knob,
strike the igniter,
once that the TC
has
engaged
onto the mag-
netic coil the
valve will remain
open but not gas
will flow towards
the burner..
STAGE 3:
when TC is en-
gaged,
coil
open, if the knob
is released the
gas flow can go
towards
the
burner.