Cleaning The Boiler - Navien KDB-203 STC Instruction Manual

Cleaning the boiler

Much soot accumulated inside the boiler will
reduce the life and efficiency.
At least once a year, clean the boiler inside.
Cleaning the oil filter
In case that the oil filter gets dirty, stop
operating, lock the oil valve, and remove dust
or rust accumulated below the oil cup.
Detach the oil cup by rotating right and left.
Pull down the filter.
Wash the filter and the inside of the oil cup
with clean heating oil (light oil)
Cleaning the oil tank
Water may get mired in during feeding oil or
get accusmulated naturally during the long
period in the oil tank. In this case, drain water
off through the drain plug in the oil tank, and
when oil starts to get out, lock it.
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