Raytheon Beech Baron E55 - Heating and Ventilation (TC-1 thru TC-1657;

Raytheon
Aircraft
Company
BARON
55
AND
58
SHOP
MANUAL
I-IEATING
AND
VENTILATION
(TC-)
THRU
TC-1Ci57;
TE-)
THRU
TE-967,
EXCEPT
TE-959;
TH-1
THRU
TH-436)
1
THE
HEATER
CONTROL
SYSTE~hlf
The heater
control
system
consists
of
two
thermostats
(refer
to
Figures
1
and
2).
A
thermostat
in
the
heater
duct
I
controls
the
duct
temperature
according
to
its
setting,
which
is
varied
by
the
push-pull
control
CABIN
HEAT
in
the
subpanel.
When
the
push-pull
central is all the
way
out
the heater
will
automatically
shut
off
when
the
duct
temperature
reaches
200
-1
5"F.
The
further
the
control
is
pushed
in,
the
lower
the
temperature
at which
the heater
1
will shut
off.
An
overheat
thermostat
on
the
heater
is
set
to
shut
off
the
heater
at
300"F
in
case
the
duct
thermostat
malfunctions.
As
in
other
combustion
heater
installations,
it
is
a
normally-open
thermoswitch
which
closes
if
an
overheat
condition
develops.
When
dosed,
it
shorts the
heater
power
supply
to
ground,
blowing
a
fuse
and
shutting
down
the
heater.
The
fuse
cannot
be
replaced
in
flight.
NOTE
Single
or
dual
heater
fuel
pump
operation
is
controlled
by
the
landing
gear
limit
switch.
While
on the
ground,
or
with
the
landing
gear
extended,
heater
operation
is
supplied
by
one
heater fuel
pump.
1
During
flight,
or
with
landing
gear
retracted,
heater
operation
is
supplied
by
both
heater
fuel
pumps.
RIGG(NG
THE
HEATER
CONTROLS
The
cabin
air control
on
the far
left
side of
the
subpanel
controls
the iris valve
and
the heater
safety
swttch. Place
the iris
valve
actuator
as
far
to
the
right (facing forward)
as
possible.
With
the
CABIN
AIR
control
pushed
in,
attach
1
the control
wire to the
iris valve
actuator
arm.
The
safety
switch
is
positioned
on
the
underside
of the
heater
shelf
in
adjustable
slots.
Pull
the CABIN
AIR
control
to
the
half-open
position
and
set
the
safety
switch
arm
so
that
the
switch
will be
open
at
this
point.
When
disconnecting
the
iris
valve
control
for
adjustment
purposes,
position
the
control in either
the
full-open
or
full-
closed
position,
so
that it
may
be
reinstalled
without
disturbing
the
adjustment
of
the
safety
switch.
The heater
ductstat control located
at
the
far
right
of
the left hand
subpanel
controls
the
heater
thermostat.
With
the
CABIN
HEAT
control
pushed
in
and
the
lug
an
the
ductstat
pushed
to
the
far
right,
push
the
control
wire
through
the
1
lug
and
tighten
the
screw.
Make
sure
the
guide
lug
on
the
ductstat
switch is in
the
straight
downward
position
before
securing
the control
wire.
On
serials
TC;-955
thru
TC-1657,
TE-)
thru
TE-967,
except
TE-959
and
TH-1
thru
TH-436,
I
the
pilot’s
and
copilot’s
air
vent
doors
above
the rudder
pedals
are
controlled
by
push-putt
knobs
located
at
the
extreme
left
just
below the
subpane).
The
doors
are
adjusted
at the
attachment
of
the cable
and
vent
door
an
the
firewa((
OVERHEA~
THERMOSTAT
The overheat
thermostat
is
controlled
by
an
adjusting
screw on
the bottom of the
thermostat.
A
letter H
with
an
arrow
I
through
it
on
the
head
of the
switch
indicates the
direction the
sleeve
should be
turned
to
increase
the
temperature
setting.
One
turn
will
change
the
temperature
setting
approximately
125"F.
i WARNINQ(
WARNINQ
Never
set
the thermostat for
temperatures
above
300"F,
The
heater
is
not
designed
for
higher
temperatures
and
fire
may
result.
The
overheat
thermostat
is
set at
the
factory
to
operate
at
300"F
and
ordinarily
will
not
need
to
be
adjusted.
EZO
SECTION
10
1