Ormandy SCP PLUS 3000, Техническое руководство

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3. ACCESSORIES
The hot water boilers are fitted with a series of accessories that can be subdivided as follows:
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Safety accessories (safety valves, safety pressure switches, safety thermostat)
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Control accessories (thermostat)
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Observation accessories (temperature gauges, pressure gauge, flame inspection)
3.1 THERMOSTATS
There are usually three: one for limiting or regulating; the others for safety or locking.
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The limiting thermostat shuts down the burner when it has reached the temperature: and automatically
restarts it at a predetermined value; moreover, it provides for a contact to actuate the second flame of
the two stage burner.
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The safety thermostat locks the burner at a fixed temperature value and sends out an alarm signal.
Restarting occurs only after the cause of the alarm has been removed and the system has be reset by
operating the reset button on the switchboard.
3.2 PRESSURE GAUGE
The pressure gauge is Bourdon type consisting of a flat elliptical section metal tube, bent to an arc. One end
of the tube is open and communicates with the boiler where the pressure is to be measured; the other end,
closed and free to move is connected by a lever system to a toothed arc and to the gauge indicator hand.
The gauge shows in red the design pressure.
3.3 THERMOMETER
The stainless steel thermometer has a great dial, with a suitable full scale and 4000 mm capillary.