Specifications
MONITOR
HEATING
SYSTEMS
Section
4:
Maintenance
4-4
VERIFY
IGNITER
OPERATION
Visually
inspect Igniter Operation
WARNING:
WARNING:
HEATER
IS
OPERATIONAL
DURING
THIS
INSPEC-
TION.
AVOID
DIRECT CONTACT
WITH
ANY
HEATED
OR
ELECTRICAL COMPONENT.
STEP1:
Prepare
for
Inspection
Remove
Front
Cover
and
Louver Assembly.
STEP2:
Visual
Inspection
A.
Turn heater
ON.
B.
Look
(downward)
through
window
on the
Com-
bustion
Chamber.
Verity
that
igniter
is
glowing.
If
igniter does
not
glow, something
is
wrong.
Refer
to the
Troubleshooting Chart
in
Section
6
of
this
Service
Manual
to
diagnose
the
problem.
C.
An
alternate
inspection
is to
feel
the
igniter
cover
after
the
unit
has
been
in the
ignition
stage
for
about
5
minutes.
It
should
be
warm.
CAUTION:
If
igniter
is
broken.do
not
operate
the
"ON/OFF
switch
button
repeatedly.
STEP3:
Reassembly
of
Heater
Turn
the
heater
OFF and
replace
the
Louver Assem-
bly.
4-5
CLEAN FUEL CONSTANT
LEVEL
VALVE
FIL-
TER
Note:
Use a
quality fuel filter
at the
tank
to
minimize
need
for
cleaning constant level valve filter,
A
water
separate type filter
works
well,
and
avoid felt type filter elements.
Contaminants
are
trapped
by the
filter
to
prevent
them
from
clogging
the
Fuel Constant Level Valve.
The
filter,
itself'has
a
great number
of
small pores.
Whenever
a
filter
is
torn
or
disfigured (enlarged
pores),
it
should immediately
be
replaced.
Inspect
and
clean
the
filter
as
indicated
by the
procedure
below:
Strainer
Strainer
spring
Constant
Level
Valve
Strainer
Cover
Drain
Guide
Container
Constanl
Level
Valve
Drain
Screw
CLOSE
SHUT-OFF
VALVE
OF THE
EXTERNAL
FUEL
TANK
TO
AVOID
DRAINING
ALL
FUEL
FROM
TANKS.
NOTE:
Power
should
be OFF
during
the
perfor-
mance
of
this procedure.
STEP1:
Disassembly
A.
Using
a
phillips
head screwdriver, unscrew
the
screws
holding
the
rounded diamond-shaped
cover
plate
at the
bottom
of the
Fuel Constant
Level Valve. Remove
the
cover plate.
NOTE:
Position
a six
inch
U
shaped piece
of
metal
or
cardboard under strainer cover
to
drain
fuel
into
a
pan.
B.
Carefully remove
the
rubber gasket which
is
located
behind
the
cover plate.
STEP2: Inspection
and
Cleaning
A.
Pull
the
filter
straight
out of the
fuel reservoir.
B. If the
filter
is
dirty (but undamaged), rinse
the
filter
in
fresh,
clean
kerosene
to
remove
all
particles.
Replace damaged
filters.
C.
To
drain
off
upper portion
of
fuel constant level
valve,
back
out
phillips
head screw which
is
located
slightly
above
and to the
left
of
filter
cover
plate.
(See
Fig4-1)
D.
If
upper portion
drain
is
dirty
or
containing
water,
then
remove pump
and
inspect
and
clean
its
screen.
STEPS:
Reassembly
A.
Push
the
(new
or
cleaned) filter back
into
the
bottom
of the
fuel reservoir.
B.
Replace
both
the
rubber gasket
and the
cover
plate.
(Take care
to
properly align
the
screw
holes
in the
gasket
and
cover
plate).
C.
Wipe
up any
spilled
fuel.
Figure
4-1
CLEAN
FUEL
CONSTANT
LEVEL
VALVE
41