Specifications
MONITOR
HEATING
SYSTEMS
Section
1:
Description
1-17
FLUE
PIPE
The
Flue Pipes
is
adaptable
in
three
(3)
sizes. This
provides
the
flexibility
to
meet
the
installation
re-
quirements
for
walls
of
various thicknesses.
The
Flue Pipe
is two
Sections, Flue pipe
A and
Flue
pipeB.
The
Flue Pipe
A
contains
a
"T"-shaped
fitting con-
sisting
of
four
ports. This side
is
mounted
on the in-
terior
wall
of the
dwelling.
The
Flue Pipe
B is
vented
outside
the
dwelling.
The
Flue
Pipe
Assembly con-
sists
of two
concentric tubes. Outside
air is
drawn
through
the
cylindrical space between
the
tubes.
Combustion by-products
are
vented through
the in-
ner
tube.
As
the
cool
air
enters,
it is
heated
by the hot air
that
is
exiting
the
system.
A
large-bore,
flexible
hose connects
the air
inlet
port
on
the
Flue Pipe
A
with
the
Combustion Blower;
a
cloth-covered metal pipe connects
the
Combustion
Blower
with
the
exhaust outlet
on the
Flue Pipe
A.
IMPORTANT:
If
extension kits
are
utilized,
use the
correct
damper
in
accordance
with
the
instructions
in
table
2-1 of
page
14
1-18 COMBUSTION
BLOWER
MOTOR
The
combustion
blower
has a
four stage intake
fan
Burner modes control
fan
speeds.
The
combustion
air
controls
are as
follows:
Table
1-1
COMBUSTION
AIR
CONTROL
(M-2400)
Burn
Mode
Fan
Speed
(r.p.m.)
High
2,800
Medium-High
2,300
Medium-Low
1,900
Low
1,500
Please refer
to
paragraph
1 -35 in
page?
for the
de-
tails
of the
combustion blower motor control.
1-19
HEAT
EXCHANGER
An
inlet
at the top of the
Heat Exchanger permits
the
heated
air to
travel from
the
Combustion Chamber
into
the
exchanger.
An
outlet,
at the
bottom
of the
exchanger, permits
combustion by-products
to be
vented
to the
Flue
Pipe.
air
within
the
exchanger heats
the
outside metal
walls.
The hot
metal walls,
in
turn, heat
air
that
is
pushed
past
the
exchanger
and is
circulated into
the
room.
An air
baffle, directly
in
front
of the
exchanger,
deflects
the
heated
air
upwards,
and
out, through
the
louver
assembly.
A
pair
of
Over-Heat Protector Switches protect
the
heater
from
damage
due to
excessive heat built-up.
1-20
AIR
CIRCULATION
FAN
Circulation fans
are
driven
by
three-speed motors
and are
designed
to
circulate
the
heated room air.
If
the
heater
is
running
in low
burn modes,
the fan
also
runs
at
low-speed;
in
medium-low burn mode,
the fan
runs
at
medium-speed;
in
medium-high
or
high burn modes,
the fan
advances
to
high speed.
Operation
of the fan is
controlled
by the
micropro-
cessor
and fan
thermostat switch.
Physically assembled with
a
protective wire cage
for
the
heater,
the
entire
fan
assembly
is
secured
to a
bracket
on the
rear
of the
Heater Cabinet.
A
metal conduit,
at the
rear
of the
heater, protects
the
fan
wiring from damage.
1-21
AIR
PRESSURE
SWITCH
This
switch consists
of a
rubber diaphragm which
senses
changes
in air
pressure(it
is
connected
to the
Combustion Blower)
and is a
normally open, micro
switch.
Should
an
abnormal pressure differential exist,
the
switch opens
to
disable
the
circuitry that controls
the
supply
of
fuel.
Since
the
flow
of
fuel
to the
Burner
Pot
is cut
off,
the
flame
extinguishes
(after
all
fuel
currently
in the
line
has
been consumed),
and the
code
fE14jis
indicated
in the
digital
display.
This
safety
mechanism
can be
triggered
by
several
conditions:
—
Leak
or
loose
connection
in air
line
—
Leak, loose,
or
broken
tubing
which connects
the
Air
Pressure Switch with
the
Combustion Blower
—
Clogged
or
blocked
Air
Line
—
Blocked
or
clogged Flue Pipe
—
Intake port Combustion Blower
is
blocked.
—
Combustion Blower
is
inoperable
—
Clogged
or
block
air/intake
hose.
While moving through
the
Heat Exchanger,
the hot