Safety Device - Navien KDB-203 STC Instruction Manual

Safety device

Combustion safety device
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.
Low water level blocking device
If water is insufficient in the boiler, it
interrupts the operation of the boiler with the
power cut off.
When water refills, the boiler starts operating
again automatically.
Overheating preventer
If the temperature of the boiler rises up too
high, it is dangerous. So, in such case, this
device cut off 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 off 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.
Freezing 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)
Safety device on power-failure
If the power gets off, oil gets blocked
automatically and the combustion stops.
19