Raytheon Beech Baron E55 - Page 489

BEECHCRAI~T
BARON
55
AND
58
SHOP
MANUAL
inflating air
overboard
through
the
control
valves:
system
only,
a
second oil
separator
is
plumbed
between
each
rn~inl
vacuum
is
then
reapplied
to
the boots,
oil
separator
and
control
valve
assembll-:
a
drain
line
from:hc´•
second
oil
separator
connects
with the overboard
vent
line
to
Through
the
electric timer
the
solenoid
operated
control
convey
the
condensed
oil
vapor
overboard.
Eiit~cti´•tt
valves
cause
all of the
boots
to
be
inflated
simultanzouslv:
TC-870.
TE-
I
throuoh TE--IS
I.
11
0.7 microil
filter
i!,
therefore,
the
system
is described
as
a
’’single-inflation"
plumbed
between
each
rnpinr
oil
s´•~pnraltlr
;inci
type.
Since
the
control valves
operate
simultaneously
and
are
corresponding
control
valve assembly
to
remo\e
oil
\;IFor.
positive
in
positioning
from
"dump’’
to
"deicer
pressure’’
Condensed
oil
vapor
is
conducted overboard thruurrh
a
c~min
the
system
will
operate
with
one
engine-driven
vacuum
line
connected
to
the
overboard
vent
lint.
pump
inoperativet
which
permits
operation
of
the
deicer
system
on
one
engine.
Each
Tavco
control valve Llssrmblv contains
LI
‘;CTt"~
Both
MANUAL
and
AUTOMATIC
positions
of the
deicer
immediately
inside
the
vent
pen.
On
airplanes
equipped
\\´•irh
switch
are
momentary.
Momentary
engagement
of
the
the H-14
Autopilot,
this
screw
is
removed
and
AUTOMATIC
position
will
automatically
inflate
the
deicer
during
the
deicine
cycle
is utilized
for
powerinE
t~lc´•
autopilot
boots for five
to
eight
seconds
before
they
resume
the
vacuum
servos.
hold-down condition. The MANUAL
position
will inflate
the
boots
only
while
the
switch
is held
in
engagement;
when
SYSTEhl
CHECKOUT
the switch
is
released,
the
boots
will
return
to
the
vacuum
hold-down
condition.
Control
Vill~SS
The
oil
separator
in each
engine
accessory
section
recovers
a.
Check
control valve
operation
Is
ioliou´•s~:
oil in the
pump
output
air;
the oil is then returned
to
the
engine
i.
Turn
on
the
batte~´•
master
switch.
sump.
An
air
filter is connected
to
the
pressure
outlet
of
each
place
the
deicer
s~jtcm
s~i!ch
control valve
to
remove
foreign
particles
and
any
remaining
in the
AUTOhlATIC
position.
oil from
the
deicer
boot
intlatinp
air. The deicer
system
also
The
control valve solenoid
shouid be
actuarrcf
contains
a
gage
in the
cockpit
to
register
system
pressure
and
immediately
for
seven
seconds
as
evidenced
b´•
an
audible
a
standard
reset
type
circuit breaker
to
protect
the
deicer "click"
at
the
berinning
and
at
the end
of
the The
system
electrical circuit,
i’click’’
can
also
be
detected
by
placin~
the hand
~?n
the
solenoid.
SYSTEMS INCORPORATING
b.
If
a
control
val\´•r:
does
not
iunctiun.
proceed
a~
TAVCO
CONTROL
VALVE
ASSEMBLIES
follows.
i.
Unplug
the
electrical
connector
at
the
When the deicer
system
three-
position
switch is
activated,
a
solenoid.
solenoid-operated pilot
valve builds
up
pressure
against
the 2. Attach
a test
light
or
other suitable
test
pressure-vent
shuttle
spool, causing
the
boots
to
be
equipment
to
the
connector
and
place
the deicer
switch in the
pressurized.
When
the
pressure
reaches
npproximntely
one
AUTOMATIC
position.
pSi_g,
a
ball
poppet
closes
off
the
vacuum
port
and the
3. If
the
test
equipment
does
not
indicate
a
pressure
continues
to
increase until
regulated
boot
pressure
is
complete
circuit,
check
the circuit from the
tilnrr
to
tts
reached. The
pressure
relief valve is
an
integral
pan
of
the
solenoid
connector
to
ground.
control
valve
assembly.
Replace
defective
timer
component
(hoiiijn~
relay
or
time-delayl,
if
necessary.
After
the
solenoid is
de-energized,
the shuttle
returns
to
the
Use
an
ohmmeter
to
check the rolenoid:br
an
"dump"
position.
When the
remaining
boot
pressure
lowers
open
circuit. If the
solenoid
circuit
is
open,
replace
the
to
1
to
1.5
psig,
the ball
poppet
opens
to
the
vacuum
pen,
control valve.
permitting
the
boots
to
evacuate.
c.
On
Goodrich
control
valves
onl!~.
if
the
solenoid
Two
small
lines,
pilot
pressure
and
priority
pressure,
circuit
is
satisfactory
perform
the
following
check:
plumbed
between
the valve assemblies
in
the
nacelles allow
i.
Remove
the
solenoid
safety
wire and
unscrew
operation
of
the
system
on one
engine by
using
pressure
from
solenoid.
the valve
for
the
operative
engine
to
operate
the shuttle
in the
opposite
valve.
CAUTION
Each
control
valve
assembly incorporates
a
filter
to
remove
oil and
any
foreign particles
from the
system.
On
airplanes
Do
not
loss the steel hex
actuator
pin
or
the
~;Llvr
TC-483, TC-399,
TC-602, TC-616, TC-657,
and
~C-690
poppet.
E10
11-9