Raytheon Beech Baron E55 - Page 615

Raytheon
Aircraft
Company
BARON
55
AND 58
SHOP
MANUAL
CAUTION:
Ensure
that
the alternator
wiring
is
properly
connected. Reverse
polarity
will
destroy
diodes
in the
electrical
system.
Never close
the
battery
master
switch
until all
wiring
harness
connections
have been
made
and
properly
tightened.
It
should be
remembered
that
the
alternator is
polarized
eve~ytime
the
battery
master
switch
is turned
on;
therefore,
any
attempt
to
polarize
the unit
will
only
damage
the
voltage
regulator
and
the
wiring
harness.
c.
Connect
all
electrical
wiring
tagged
and
identified
during
the removal
procedures.
d.
Install the
lower
portion
of
the
nose
bug.
e.
Close the
engine
compartment
door
and
secure.
AL TERNA
TOR
AND
GENERA
TOR
OVERHAUL
Refer
to
applicable
Vendor
Publications
for
complete
tests
and maintenance
procedures.
VOL
TA
GE
REGULA
TOR
ADJUS
TMENT
(A
L
TERNA
TOR
S
YSTEM)
The alternators
are
controlled
by
two
fully
transistorized
electronic
voltage
regulators. Only
one
regulator
is
operable
in the
system
at
any
one
time.
The
remaining regulator
is
used
as an
alternate
or
standby
unit.
When
switched
into
the
circuit,
either
regulator
will
automatically
adjust
the
alternator
output
to
the
required
electrical
load,
including
battery
recharging.
Control and
selection
of
the
regulators
is
provided by
a
two
position
selector
switch,
placarded
VOLT
REG-1-2,
located
on
the
pilot’s
subpanel.
The
voltage
regulators
are
located
in
the
nose
baggage
compartment
on
all
series,
either
on
the
aft
bulkhead
of the
nose
baggage
compartment
(TC-I
thru
TC-1072
and TE-I
thru
TE-540,
TE-542,
TE-544,
TE-546
and
if-548)
or
below
the
floorboard
of
the
nose
baggage
compartment
just
foMlard
of
the
battery
box
(TC-1073
and
After;
TE-541,
I
TE-543,
TE-545,
TE-547,
TE-549
and
After
and
TH-I and
After).
The
voltage
regulators
utilized
on
the
airplanes
should
be
checked
and,
if
necessary,
adjusted
when
a
voltage
regulator
or
alternator
is
replaced
or
when
a
periodic
inspection
reveals
a
need
for
adjustment.
The
ideal
time to
adjust
the
voltage
regulators
is
immediately
following
a
flight
of
20
to
30
minutes
duration
or
longer,
in
which
normal
electrical
loads
have
been
used.
If
the
electrical
system,
including
the
voltage regulators
and
alternators,
cannot
be
warmed
up
by
flight,
they
may
be
warmed
up
on
the
ground.
The
voltage
regulator adjustments
should
be
made
while
operating
one
engine only.
The
left
engine
has
been
selected
to
permit
a
completely
safe
access
to
both
voltage
regulators
so
that
they
may
be
adjusted
while the
engine
is
operating,
without
danger
of
personal
injury
from
the
propeller.
WARNING:
Do
not
operate
the
right engine.
The
following
procedures
should
be used
to
adjust
the
voltage regulators:
CAUTION:
During
all
tests
and
adjustments
on
the
voltage regulators,
make certain that the
regulator
circuits,
including
any
meter
or
test
leads,
are
always
protected
from
accidental
grounding
to
airplane
structure
and
contact
with other
circuits.
Even
a
momentary
ground
contact
may
permanently
damage
the
voltage
regulators.
a.
Start the
left
engine
according
to
the ENGINE
START
procedures
in the
applicable
Pilot’s
Operating
Handbook.
Do
not
start
the
right engine.
b.
Place the
left
alternator
switch,
located
on
the
pilot’s
subpanel,
in
the
on
position.
Place the
VOLT
REG
switch,
also
located
on
the
pilot’s
subpanel,
in the No.
I
position.
E21
SECTION
13
17