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SAFETY DEVICES
14
Chapter 4
Adjustment automatic circuit breaker switch
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Automatic circuit breaker switch (block thermostat)
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Circulation system
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Expansion system*
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Safety dissipation system incorporated with the generator with thermal safety valve (self-activated),
whenever the appliance does not have a temperature self-adjustment system.
The temperature safety sensors must be in place on the machine at a distance no greater than 30 cm from
the fl ow connection.
Whenever the generators lack a device, those missing can be installed on the thermo product fl ow pipe,
within a distance no greater than 1m from the machine.
The domestic heating appliances with automatic feeding must:
be equipped with a fuel block thermostat, or
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be equipped with a cooling circuit prepared by the manufacturer of the appliance.
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The cooling circuit must be activated by a heat safety valve such to guarantee that the limit temperature
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set by the Standard is not exceeded.
Connection between the power supply unit and the valve must be free from interceptions.
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The pressure upstream from the cooling circuit must be at least 1.5 bar.
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6 Litre expansion vessel
3 Bar safety valve Pressure switch
*The product expansion vessel is equal to 6 litres. The
closed system expansion vessel must be dimensioned
between 4% and 6% of the total volume of the plant
therefore, the standard closed vessel may not be
suffi
cient in cases of greater water volumes.