3
Operation
9
©
Moffat Ltd, August 2012
Revision 3
Moffat Cobra Series CS9 - Gas Salamander
3.3 Racking
Racking System
The Rack System fitted to the Cobra Salamander
is self-supporting when withdrawn, to allow easy
loading of food. The installation of the rack is
dependant on the cooking function required.
With Branding Plate
Without Branding Plate
3.4
Explanation of the Control
System
Safety System
The purpose of the safety system is to shut off the
flow of gas if the main flame goes out. It
comprises the flame itself, the thermocouple, and
the flame failure gas valve.
The main flame is lit by rotating the gas control
knob anti-clockwise and holding in, which in turn
temporarily pushes the plunger inside the safety
valve open and allows gas to flow through. The
main burner is then lit manually. Once the burner
is lit, the thermocouple will begin to generate
millivolts (after about 10 to 30 seconds of being
heated) and will energize the electromagnet inside
the gas valve. Once energized the electromagnet
holds the plunger inside the gas valve in the open
position. The plunger has to be pushed all the way
in for the electromagnet to be able to hold it in
place. If the main burner flame goes out for some
reason, the thermocouple will cool after about 10
to 30 seconds and stop generating millivolts. The
electromagnet will then de-energize, and the
plunger will snap shut, cutting off the flow of gas
to the main burner.
Detail of each component in the safety system is
explained below.
Thermocouple
The thermocouple is a device that generates
electricity when heat is applied to the tip.
The tip of the thermocouple is located in the main
burner flame, and the nut at the other end of the
thermocouple screws into the back of the gas
valve. Inside the copper tubing is a wire which is
joined at the tip but insulated from the rest of the
tubing. These two parts (the copper tubing and
wire) make up the 'wiring' for an electrical circuit.
When these two dissimilar metals, wire and tip,
are heated an electrical voltage is produced. This
type of thermocouple generates between 7 and
30 millivolts when heated in the main flame.
Figure 3.4a
Insulator
Nut
Conductor
Tip
Internal
Wire
Figure 3.3a
Содержание CS9
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