Specifications
MONITOR
HEATING SYSTEMS
Section
1:
Description
1-7
DESCRIPTION
The
Monitor heaters
are
composed
of the
following:
a
spill
tray,
a
cabinet,
a
combustion system,
an air
circulation system,
a
fuel delivery system, electrical
and
electronics systems
and a
variety
of
safety
mechanisms.
1-8
SPILL
TRAY
The
Spill
Tray:
—
Protects
the
floor from damage resulting from
fuel
spillage.
—
Provides
a
secure,
tip-resistant
heater base.
Metal retainers
(2)
secure
the
heater
to the
Spill
Tray.
The
legs
are
positioned with
in the
circular indenta-
tions.
1-9
HEATER CABINET
A
steel
cabinet
holds
and
protects
all
internal
com-
ponents.
A
number
of
primary parts
are
assembled
to
form
this
housing.
1-10 CMBUSTION SYSTEM
The
Combustion System
is
responsible
for the
pro-
duction
of
heat which
is
circulated into
the
room
.
In the
Combustion Systems
a
mixture
of
fuel
and air
is
burned
to
produce
heat.
Air is
drawn from outside
the
dwelling
into
the
Combustion
Chamber.
At the
same
time, fuel
is
metered
from
a
storage cavity into
this same Combustion Chamber.
Within
the
cham-
ber,
the
air/fuel mixture
is
ignited
to
produce heat.
The
Monitor combustion systems
are
safeguarded
by
a
pair
of
overheat protector switches; They
will
shut down
the
heater
(to
protect
it
from damage)
in
the
event
of
excessive heat
build-up.
The
overheat
protector
switches reset automatically after
cooling
down.
1-11 COMBUSTION CHAMBER
This
tall
cylinder
is
positioned
on the
Heater Base.
It
is
secured
to the
base
by
phillips
head screws.
Connected
to the
Combustion Chamber
are the ig-
niter, (located within
the
chamber)
a
fuel
line,
the
Heat
Exchanger,
and a
Flame Sensor.
Within
the
Combustion Chamber
are the
Burner Pot,
the
Combustion Ring Assembly. Access
to
those
in-
ternally-located parts
is
facilitated
by a
removable
Service
panel.
A
Window
on the
panel
lets
the
technician
visually
examine
the
combustion
process(i.e.
glowing igniter
or
proper flame color).
An
airway,
in the
Cabinet Base, extends from
the in-
take
fan of the
Combustion Blower
to the
hollow
base
of the
Combustion Chamber.
This
airway chan-
nels
air to the
Combustion Chamber.
The
Flame Sensor
is
mounted with
two (2)
phillips
head screws onto
the
wall
of the
Combustion
Cham-
ber.
1-12
BURNER
POT
Designed specifically
to
support combustion,
the
Burner
Pot
(refer
to
Figure
1-2/1-3)
contains
a
series
of
air
holes,
an
igniter tube
(to
accommodate
the Ig-
niter),
and a
fuel
inlet
fitting
(interconnects
the
fuel
line).
It
is
secured
to a
mounting plate near
the
bot-
tom
of the
Combustion Chamber.
The
Combustion Ring Assembly
is
seated
on
three
(3)
screws
or
pins
in the
Burner Pot.
1-13 COMBUSTION RING
ASSEMBLY
This assembly
is a
special structure, designed
to
promote efficient combustion.
1-14 FLAME
SENSOR
Mounted
on the
outside wall
of
Combustion Cham-
ber,
the
Flame Sensor always supervises
the
flame.
1-15 IGNITER
Located within
the
igniter tube
of the
Burner Pot,
the
Igniter
is
designed
to
pre-heat
the
Burner
Pot and to
vaporize
and
ignite
the
air/fuel mixture
to
start
the
combustion process.
The
Igniter
is
secured
by a
bracket
and
screw
to the
igniter tube.
The
cover plate
is
secured
to the
com-
bustion chamber
by
three
(3)
phillips
head screws.
1-16 COMBUSTION
AIR
SYSTEM
The
Combustion
Air
System channels
air to and
from
the
heater.
Outside
air is
drawn into
the
heater
by the
Combus-
tion
Blower through
an
airway
to the
Combustion
Chamber.
A
Combustion Blower draws
the
intake
air in
through
a
Flue Pipe. This
air
enters
the
Combustion
Chamber
at the
Burner
Pot and
mixes with
the
fuel
to
support
combustion,
Remaining
air is
heated
and
is
drawn
into
the
Heat Exchanger.
As
the
heated
air
passes through
the
Heat Exchan-
ger,
an Air
Circulation
Fan
blows room
air
past
the
Heat
Exchanger
and out
again into
the
room, heating
passing
air by
convection. Exhaust vapors
exiting
from
the
Heat Exchanger
are
vented through
the
Flue
Pipe.
A
deterioration
of air
pressure
at the Air
Pressure
Switch
is an
abnormal condition;
the
heater
is
shut
down
by the
malfunction.