
32
3-90-00674R20_08/12
The
l
ow
d
raft
Pressure
Switch
is
a
dif
feren
-
tial
pressure
switch
that
monitors
the
negative
pres
-
sure
(Draft)
in
the
firebox.
If
the
draft
becomes
too
low
for
pr
oper
com
bus
tion,
the
swit
ch
opens
, c
ut
ting
power
to
the
feed
motor
and
the
igniter
circuits.
This
sw
itc
h
is
c
on
ne
ct
ed
in
to
th
e
AC
(h
ig
h
vo
lta
ge
) w
iri
ng
.
Th
e
C
on
tr
ol
b
oa
rd
/E
SP
co
m
bi
na
tio
n
is
r
e-
sponsible
for
all
high
limit
safety
control.
There
are
2
hi
gh
li
m
its
,
on
e
no
rm
al
o
pe
ra
tio
n
hi
gh
li
m
it
an
d
one
backup
high
limit.
The
control
has
an
automatic
di
ag
no
st
ic
c
irc
ui
t t
ha
t c
on
tin
uo
us
ly
m
on
ito
rs
th
e
E
S
P
and
Room
Sensor
for
faults.
If
a
fault
should
occur
,
the
control
sends
a
status
alert
and
at
the
same
time
the
unit
goes
down
to
minimum
feed/minimum
burn
as a safety condition.
Accentra Insert
m
otor & Component
locations
Accentra Pellet Insert Safety
d
evices
b
ackdraft
d
amper
Assembly
Always
check
to
see
if
the
damper
plate
swings
freely
inward
and
that
the
seating
edges
are
not
covered
with dirt or lint.
Low Draft Pressure
Switch
Feed Motor
Combustion Motor
Distribution Blower (under unit) See Fig. 10, Page 9.
Silicone sponge docking gasket
motor & Component locations
The
h
opper
lid
Position
Switch
is
found
in
the
rear
corner
of
the
hopper
opening.
If
the
hopper
lid
is
not
fully
closed,
the
switch
opens,
interrupting
the
power
to
the
feed
motor
and
the
igniter
circuits.
This
prevents
possible
injury
from
reaching
into
the
feeder mechanism during operation.
Hopper Lid
Position
Switch