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Navien KDB-353 STC - Safety Devices and Functions; Combustion Safety Device; Low Water Level Blocking Device; Overheating Prevention Device

Navien KDB-353 STC
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Safety device
19
When it doesn't ignite even with the power
button “ON” or it gets extinguished due to
running out of oil, the FLAME Detector(Cds)
gets to work and stops the operation.
Combustion safety device
If water is insucient in the boiler, it
interrupts the operation of the boiler with the
power cut o.
When water rells, the boiler starts operating
again automatically.
Low water level blocking device
If the temperature of the boiler rises up too
high, it is dangerous. So, in such case, this
device cut o the power automatically.
When the overheating preventer gets to
operated the combustion stops and “OVER-
HEATING, MISFIRE” lamp turns on.
If the overheated temperature is fall “OVER-
HEATING” lamp turns o and “MISFIRE” lamp
keep turning on.
If the overheating stops operating, restarts it
by pressing the “RESET button, If the
operation stop is repeated again, contact the
sales agency or the commercial agency.
Overheating preventer
During the hard winter, the circulation pump
or the burner operates automatically to
prevent the heating circuit from freezing.
In winter, keep on plugging in the power cord
and turning the power button “ON”.(the
insulation state of the pipes must be normal)
Freezing preventer
If the power gets o, oil gets blocked
automatically and the combustion stops.
Safety device on power-failure

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