Raytheon Beech Baron E55 - Page 440

Raytheon
Aircraft
Company
BARON
55
AND
58
SHOP
MANUAL
HEATER
SPARK
PLUG
GAP
Heater
spark
plug gap
should
be
set
from
0.250
to
0.312
in.
HEATER
IGNITER
POINTS
Two
sets
of
heater
ignition
points
are
installed
in
the
vibrator of
the
heater
ignition
unit.
The
primary
set
of
igniter
points
has
a
service
life
of
1,000
hours,
theater
operation)
at
which
time
the
alternate
set
of
points
should
be
put
in
I
use.
When
the
alternate
set
of
points
has
been
used
for
1,000 hours,
replacement
of
the vibrator
must
be
accomplished.
Failure
to
switch
to
the
alternate set of
points
at
1,000
hours
may
cause
the
points
in
use
to
fail
making
the
alternate
set
of
points
inoperative.
The
alternate
set
of
points
can
be
placed
in
service
on
serials
piler
to
TC-191
by
a
point
selector
switch
on
the
circuit
breaker
panel
beneath
the
instrument
panel.
On serials
7C-191
thru TC-420 the
switch
is
on
the
left
hand
electrical
panel.
On
TC-421
thru
TC-1657
the
selector
switch
is
removed
and
the
points
are
placed
in
service
by
adding
a
20
gage
jumper
wire
between
terminals
A
and
B
on
the
heater
ignition
unit.
Refer
to
Section
14
Heater
(TC-421
thru
TC-954)
and
Heater
(TC-955
thru
TC-1657
and
TE-~
thru
TE-451)
wiring
diagrams.
On
serials
TE-1
thru
TE-451
the
points
are
placed
in
service
by
adding
a
20
gage
jumper
wire between
terminals
A
and
B
on
the
heater
ignition
unit.
On
serials
TE-452
thru
TE-967,
except
TE-959
and
TH-
I
thru
TH-936,
the
points
are
placed
in
service
by
a
point
selector
switch
on
the left
hand
electrical
panel.
HEA
TER
O
VERHA
UL
The
heater
should
be overhauled
and
pressure
tested
every
500
hours
of
heater
operation
in
accordance
with
the
Midland-Ross
Maintenance
and Overhaul
Manual,
P/N 30C57.
HEATER
SOLENOID
VALVE
I
Check
the
valve
operation
by
connecting
a
24 vde
power
source
with
an
ammeter
w\th
a
O
to
1
ampere
range
in
the
line.
Turn
the
power
on
and
off
several
times.
The
valve
should
draw
0.26
amperes
current
and
click
when the
valve
opens.
To
check
for
valve
leakage,
apply
35
psi
air
pressure
to
the
inlet
end
of
the
valve
and
submerge
the
outlet end
In
water
(check
direction
of
flow
arrow
an
valve).
If
the
valve
leaks
more
than
20
bubbles
per
minute,
clean
the
valve
and
recheck.
To
clean
the
valve,
wipe
all
parts
with
a
soft cloth
saturated
with
solvent,
making
sure
that
no
solvent
gets
in
the
electrical
parts.
Inspect
the
plunger
cap,
seal
and
spring.
Replace
these
parts
if
worn
or
damaged.
Blow
out
the
valve
body
with
compressed
air
before
reassembling.
Jun
27/03Page
2
SECTION
10
E20