The
l
ow
d
raft
Pressure
Switch
is
a
dif
ferential
pressure
switch
that
senses
the
pressure
between
the
firebox
and
the
room.
If
the
negative
pressure
in
the
firebox
becomes
too
low
for
proper
combustion,
the
switch
opens,
interrupting
power
to
the
feed
motor
and
the
igniter
.
If
the
switch
"opens"
during
a
rest
period,
the
control
will
not
try
to
feed
or
ignite.
If
the
circuit
op
en
s
du
rin
g
a
fee
d
or
ign
itio
n
cycl
e,
the
ind
ica
tor
ligh
ts
w
ill
remain "on".
The
Control
b
oard/ESP
combination
is
responsible
for
all
high
limit
safety
control.
There
are
2
high
limits,
one
normal
op
-
eration
high
limit
and
one
backup
high
limit.
The
control
has
an
automatic
diagnostic
circuit
that
continuously
monitors
the
ESP
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
m
otor & Component
locations
Accentra Pellet Stove Safety
d
evices
ESP- Probe
Low Draft Pressure Switch
Air Intake Flapper
Feed Motor
Combustion Blower
Distribution Blower
3" Flue Pipe Connector
The
h
opper
lid
Position
Switch
is
a
plunger
style
switch
located
in
the
hopper
lid
opening.
When
the
hopper
lid
is
closed
properly
, it
closes
the
switch.
If
the
hopper
lid
is
not
fully
closed,
th
e
sw
itc
h
op
en
s,
in
te
rc
ep
tin
g
po
w
er
to
th
e
fe
ed
m
ot
or
a
nd
ig
ni
te
r.
If
th
e
sw
itc
h
"o
pe
ns
" d
ur
in
g
a
re
st
p
er
io
d,
th
e
co
nt
ro
l w
ill
no
t t
ry
to
feed
or
ignite.
If
the
circuit
opens
during
a
feed
or
ignition
cycle,
the indicator lights will remain "on".
