Technical Information
27
MasterChef Collection Cooktops
4.3 Gas Cooktops
4.3.1 Operational Overview of Ignition / Re-Ignition System
Refer to figure 4-1
When the user turns on a burner the following actions occur:
The Mechanical Gas Regulator (Item 2) opens when the control
knob is pressed down.
The Ignition Switch (Item 1) is closed when the control knob is
turned to the 9 o’clock position. This allows power to be
provided to Electronic (Item 7) and the Transformer (Item 8).
The Electronic (Item 7) provides approximately 8 millivolts to the
activate the Thermocouple Solenoid (Item 3) for approximately 6-10
seconds to allow gas flow to the burner.
At the same time, the Transformer (Item 8) sends voltage to the
Ignition Electrodes (Item 4) to ignite the gas at the Burner (Item 5).
Once the Burner (Item 5) is lit, the Thermocouple (Item 6) is heated
and produces approximately 6-8 millivolts. The power from the
Thermocouple (Item 6) is monitored by the Electronic (Item 7) and
keeps the Thermocouple Solenoid (Item 3) open permitting gas
flow to the Burner (Item 5).
Should the Burner (Item 5) be extinguished (example: by wind) the
Thermocouple (Item 6) begins to cool down and the voltage being
produced drops. The Electronic (Item 7) detects the drop in power
and triggers the Transformer (Item 8) to spark the Ignition
Electrodes (Item 4) to re-ignite the gas. The Thermocouple (Item 6)
heats up producing 6-8 millivolts and the appliance resumes regular
operation.
In the event that the gas does not re-ignite (i.e. a defective or
contaminated Ignition Electrode (Item 4) the Thermocouple (Item 6)
continues cooling and dropping in power. Eventually the drop in
power can no longer keep the Thermocouple Solenoid (Item 3)
energized; this shuts off the gas supply to the burner (regardless of
the position of the Mechanical Regulator) (Item 2).
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