If the flame detector (photocell) becomes sooty
or
dirty
the
reduced
sensitivity
will
cause
erratic
and
incorrect
boiler
operation.
Cleaning the flame detector
Remove the flame detector (photocell) which
is
located
at
the
top
of
the
burner.
Wipe
the
glass
surface
of
the
f
l
ame
detector
(photocell)
using
a
clean
rag
and
replace.
During the annual service the flue system should
be
checked
for
correct
installation,
blockages,
corrosion
or
leakage.
Any
abnormalities
found
should be rectified immediately.
Checking the flue pipe
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