Navien LST-58K, Instruction Manual

Page: 24 / 56

Cleaning the boiler
24
If the oil filter is dirty, stop operation of the boiler, close the oil valve, and remove dust and
rust below the oil filter cup.
1. Turn off the boiler.
2. Separate the oil filter cup connected to the flexible hose nearby the inlet of the
gear pump, by turning the cup counter-clockwise.
3. Separate the strainer screen by pulling it out downward.
4. Clean the strainer screen and inside the oil filter cup using the clean boiler oil or
the light oil.
Cleaning the oil filter
Ȅ
Do not forget to wear gloves while cleaning.
<Figure 2> <Figure 3> <Figure 1>
Dirt and fume deposits on the photoelectric tube causes deteriorated sensitivity of the tube,
and the photoelectric tube may fail to detect the flame, which eventually leads to failure of
combustion.
1. Pull out the flame detector (Black) attached to below the burner.
2. Wipe the glass surface of the flame detector with clean cloth.
3. Fit the flame detector into the burner until you hear a snap sound, after cleaning.
Cleaning the flame detector
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Be sure to turn the power on, while cleaning the flame detector.
ූ
Never wipe the flame detector with wet cloth or oil.
ූ
Do not pull the wire out while separating the flame detector.
<Figure 1> <Figure 2>