Specifications

OPERATION
Understanding the basic operation of the heater, will reinforce the need to
maintain the unit in top condition at all times, whilst always observing the safety
precautions.
The heater comprises four basic systems:
1. The gas system.
2. The air system.
3. The ignition system.
4. The safety control system.
1. Air System
An axial fan, which is energised when switching ON, provides the main air flow.
2. Gas System
The gas supply to the machine is by means of a high pressure hose, connected
to a LPG cylinder, via a pressure regulator.
When the mains supply is switched on, the Safety Shut-off Valve Solenoid is
energised, allowing the gas to flow to the Flame Failure Valve, and when the
Failure Valve Override knob is depressed, gas flows to the Burner Head.
3. Ignition System
A Piezoelectric Igniter is positioned at the burner head. When the Igniter button
is depressed, a high intensity spark is generated, which ignites the gas. Heat from
the flame is sensed by a Thermocouple, which is connected to the Flame Failure
Valve. As the Thermocouple heats up, a low voltage is fed to the Flame Failure
Valve, causing the valve to open, so that after 5-10 seconds, the Override knob
may be released, and the main flame is established.
4. The Safety Control System.
Should the flame extinguish for any reason, the Thermocouple will quickly cool,
causing the Flame Failure Valve to close, shutting off the gas supply.
Similarly, should there be a power failure, causing the fan motor to stop, the
Safety Shut-Off Valve Solenoid will become de-energised, and therefore shut off
the gas supply.
Additionally, the machine is fitted with Thermal Overload Protection, which will
intervene should the unit overheat, shutting off the electrical supply.
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