MONITOR
HEATlNG
SYSTEMS
Section
5:
Servicing
NOTE:
Make sure the position
of
flame detector rod is centered between combustion ring
and
bumer
pot
before reassernbiing.(See Figure
5-6)
Flame Detector
Rod
I
Combustion
Ring
Assy
\
Burner
Pot
Combustion
Chamber
Gap
M-441:
4mm
(0.16) or
M-422:
3mm
(0.12')
or
II
11
'
For minor adjustments of flame detector
rod
without
disassembling any components:
1.
Loosen the two retaining screws
about
half
to
one full
turn.
2.
Tightening down on the top screw first
will
cock the rod outward away
from
the combustion
ring. Tightening
the
bottom screw first will
cock the rod inward towards
the
combustion
ring.
5-5
CLEANING
THE
FUEL
INLET
When cleaning the combustion chamber and the
bumer pot, the fuel inlet
nozzle should also
be
cleaned. This can
be
done
as
follows:
1,
Disconnect copper fuel
line
at bum chamber.
more
more
2,
Push
a
piece
of
wire (about the same size
as
the
I.D.
of
fuel inlet pipe) into the fuel inlet
nozzle.
3,
If
obstruction is felt twist wire back and forth (to
brake
up
soot and carbon) so that wire ulti-
mately penetrates igniter shield.
On
M422,
also check air holes surrounding
fuel inlet for blockage and clear
if
necessary.
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