IMMERSION ELECTRODE BOILER SAFETY FEATURES

A-TYPE ALARM FUNCTIONS THAT SHUT DOWN THE BOILER DIRECTLY VIA POWER CONNECTION:

· HighHigh pressure (also disables heating elements)

· HighHigh water level in outer vessel

· LowLow water level in outer vessel

· Circulation pumps failure (both pumps)

· Alarms from high voltage switchgear (i.e. protection devices that trips the power breaker)

· HighHigh conductivity

· Emergency Stop

EXAMPLES OF B-TYPE ALARM FUNCTIONS THAT WARN THE OPERATOR, BUT DON’T SHUT DOWN OPERATION:

· High pressure

· High water level in outer vessel

· Low water level in outer vessel

· Circulation pump failure

· High conductivity

· Signal out of range (for each 4-20mA transmitter signal)