Sharp R-8R51 - Page 11

R-BR51(W)
R-8R51(B)
ail
Without
feaving
the
oven,
this
hot
air
is
reheated
by
the
convection
heating
element,
passes
through
the
con-
vection
passage
and
enters
the
inside
of
the
oven
cav-
ity
again,
in
a
continuing
cycle.
In
this
way,
the
hot
air
circulates
inside
the
oven
cavity
to
raise
its
temperature
and,
at
the
same
time,
comes
into
contact
with
the
food
being
cooked.
When
the
temperature
inside
the
oven
cavity
reaches
the
selected
temperature,
the
convection
heating
ele-
ment
is
de-energized.
When
the
temperature
inside
the
oven
cavity
drops
below
the
selected
temperature,
the
convection
heating
element
is
energized
again.
In
this
way,
the
inside
of
the
oven
cavity
is
maintained
at
ap-
proximately
the
selected
temperature.
When
the
convection
time
reaches
"0",
the
convection
heating
element
is
deenergized
and
the
convection
fan
stops
operating
and
the
oven
shuts
off.
After
the
oven
shuts
off,
if
the
temperature
inside
of
oven
cavity
is
more
than
100°C,
the
fan
motor
remains
rotating
until
the
temperatur
goes
down
less
than
100°C.
Grill heating element
Convection
passage
Oven
cavity
Convection
heating element
Door
Auxiliary
fan
Convection motor
Convection fan
ShXBLSE SDA BEV SSBEBABVB
Figure
D-2
Convection
Cooking
System
DAMPER
OPEN-CLOSE
MECHANISM
Usually,
the
damper
is
in
the
open
position
except
Damper
is
in
the
open
position,
because
a
portion
of
cooling
air
is
channeled
through
the
cavity
to
remove
steam
and
vapors
given
off
from
the
heating
foods.
It
is
then
exhausted
at
the
top
of
the
oven
cavity
into
a
condensation
compartment.
Convection Cooking:
Damper
is
in
the
closed
position,
so
that
no
hot
air
will
be
allowed
to
leak
out
the
oven
cavity.
Damper Operation
1.
When
power
supply
cord
is
plugged
in:
4-1.
When
power
supply
cord
is
plugged
in
and
any
cooking
programs
are
started,
a
signal
is
sensed
in
the
control
unit,
and
operates
shut-off
relay
(RY5).
Contacts
of
shut-off
relay
(RY5)
close,
the
damper
motor
is
energized,
opening
the
damper door.
1-3.
When
the
damper
is
moved
to
the
open
posi-
tion
by
the
damper
cam,
damper
switch
is
closed
(ON
position).
1-4.
The
signal
of
damper
switch
is
re-sensed
in
the
contro!
unit
and
shut-off
relay
(RY5)
is
turned
off.
1-5.
The
line
voltage
to
the
damper
motor
is
stopped
and
the
motor
turns
off.
1-2.
2.
When
oven
is
microwave
cooking:
Damper
is
in
the
open
position.
3.
When
oven
is
convection
cooking:
3-1.
Damper
motor
is
energized
by
touching
the
CONVECTION
@®
Fb
key
and
START
key.
3-2.When
damper
is
in
the
closed
position
(damper
switch
is
OFF),
its
signal
is
sensed
by
the
control
unit,
and
shut-off
relay
(RY5)
is
de-energized.
3-3.
The
damper
is
held
in
the
closed
position
during
the
convection
cooking
operation.
3.4.
At
the
end
of
the
convection
cooking,
shut-off
relay
(RY5)
is
energized,
and
the
damper
is
returned
to
the
open
position.
—
during
convection
cooking,
grill
cooking,
dual
cooking.
=-=-/Damper
position
is
set
automatically
by
damper
motor,
i
damper
switch,
motor
cam
and
damper
shaft.
These
components
are
operated
by
a
signal
that
judges
if
microwave
cooking,
convection
cooking,
grill
cook-
ing
or
dual
cooking
operation
is
selected
by
the control
unit.
Microwave
Cooking:
'f
the
damper
is
not
in
the
proper
position,
closed
during
convection,
gril!
and
dual
cook-
ing
or
opened
during
microwave,
the
control
unit
will
stop
oven
operation
after
1
minute.
NOTE: