MONITOR
HEATING SYSTEMS
Section
3:
Operation
STEP4:
Check
for
Cause
of
Overheating
NOTE:
Overheating
is
usually
caused
by
objects
that
impede
free
air
circulation.
Look
for
debris
and
other obstructions
at
front
of
heater,
at
Circulation
Fan at
rear
of the
heater,
and
at
Flue Pipe
tip
outside dwelling.
STEPS:
Remove Front Cover
and
Louver
As-
sembly.
STEPS:
Clean Heater Interior.
ZI\
WARNING:
BEFORE
PROCEEDING
TO
CLEAN
HEATER,
BE
SURE
THAT
HEATER
INTERIOR
IS
COOL ENOUGH
TO
TOUCH.
With
a
clean, lint-free, damp
rag or
other appropriate
cleaning material, wipe
up all
dust, dirt
and
debris
from exterior
of
cabinet,
including
exterior
of
Com-
bustion
Chamber
and
Heat Exchanger.
There
is
also
a
secondary thermal fuse
set at
145°C
(293°F)
/
167°C
(333T).
If
this
opens
it
must
be
replaced.
STEP7: Replace Louver Assembly
and
Front
Cover.
STEPS:
Reconnect Monitor Heater
Power
Plug
to
the
Wall Outlet.
STEP9: Turn Heater
ON
STEP10:
Reprogram Heater Microprocessor
STEP11:
Select Mode
of
Operation
3-14
RECOVERY
FROM
BLOWN
FUSE
All
electrical components
of the
Monitor heater prp-
tected against power overloads
and
electrical mal-
functions
by a
2-amp
fuses. Should
a
fuse blow,
the
recovery
procedure
is
outlined
below:
STEP1:
Turn
Monitor
OFF
STEP2:
Unplug heater
STEPS:
Remove Front Cover.
STEP4: Remove Louver Assembly.
STEPS:
Locate
and
replace fuse. Replace fuse
with same type
and
rating never
over-
size fuse.
STEP6:
Reattach Louver Assembly.
(Be
sure that
the
connector
is
connec-
ted to the
printed circuit board.)
STEP7: Reattach Front Cover.
STEPS:
Plug heater power cord into wall outlet.
STEP9: Turn Monitor
ON
STEP10: Reprogram heater
STEP11:
Program Automatic operation cycles
(if
applicable)
STEP12:
Select Automatic operation
(if
applica-
ble)
Should fuse blow again, unit should
be
checked
for
shorted component failure,
or PWB
failure.
CAUTIOM:
If
after
the
completion
of
recov-
ery
procedure,
the
heater over-
heats
again, something
is
wrong/
Do
not
operate heater
until
problem
has
been diagnosed
and cor
rected.
38
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