Raytheon Beech Baron E55 - Page 447

RaytPleon
Aircraft
Company
BARON
55
AND
58
SHOP
MANUAL
b.
Disconnect
the
electrical
wiring
at
the blower.
c.
Disconnect
the
iris valve
control
at
the
iris valve.
d.
Remove
the
blower
attaching
clamp.
e.
Remove
the
five bolts that
attach
the
iris valve
to
the
fiberglass
plenum
and
remove
the
blower and iris
valve.
f.
Installation
is
the
reverse
of removal
procedure.
When
installing
the
blower,
check for
a
good
seal between the
iris
valve
and
fiberglass
plenum.
Apply
additional
sealer
(76,
Consumable
Material
Chart
2)
as
necessary.
REII/IOVING
AND
INSTALLING
THE
CABIN
HEATER
IGNITION
UNIT
To
remove
the
heater
ignition
unit,
disconnect
the
wiring
at
the
electrical
plug,
disconnect
the
ignition
lead,
remove
the
ignition
unit
attaching
screws
and
remove
the unit.
Reinstall
the
ignition
unit
by
reversing
the
removal
procedure.
REI~IIOVING
AND
INSTALLING
THE
CABIN
HEA
TER
SPARK
PLUG
a.
Remove
the nose cone.
b.
Remove
the
heater
blower and
iris valve.
c.
Disconnect
the
spark plug
lead
and
remove
the
spark plug.
d.
Installation
is
the
reverse
of the
removal
procedure.
Use
a
standard
spark
plug
thread lubricant.
REI1IOVING
AND
INSTALLING
THE
CABIN
HEATER
FUEL
DISCHARGE
NOZZLE
a.
Remove
the
nose cone.
b.
Disconnect
the
combustion
air
flexible
tubing
from the
combustion
air inlet
at
the
heater.
c.
Disconnect
the
heater
ignition
lead
at
the
ignition
unit
and
remove
the
clamp
securing
lead
to
iris valve
assembly
(refer
to
Figure
2).
d.
Remove
the
blower
attaching
clamp
and
disconnect
the iris
valve control.
e.
Unfasten
the
clamp
securing
fiberglass plenum
to
the
heater
and
lift
plenum
and blower
assembly
forward.
f.
Disconnect
the
ignition
lead
at
spark plug
and
remove
the
plenum
and
blower
assembly.
g.
Remove
the
fuel inlet
cover,
if
installed,
and disconnect
the combustion
fuel inlet line.
h.
Remove
the
two
screws
securing
the
fuel
inlet shroud
assembly
and
remove
the
shroud
assembly
and the
90"
1
fuel
inlet
elbow.
i.
Disconnect
the
aerating
line
at
the heater
forward
end.
j.
Remove
the
fuel
discharge
nozzle
body
from the
heater
and
remove
the
discharge
nozzle
using
a
5/8
in. socket
I
wrench.
k.
Flush
the heater
fuel
system
before
reinstalling
the
fuel
discharge
nozzle.
i.
Reinstallation
procedure
is
the
reverse
of
the
removal
procedure.
When
securing
the inlet
plenum
to
the
heater,
make
certain
that
the
clamp
cleats
are
positioned
between
the
plenum
and the
heater
or
the
cleats
may
damage
the
plenum.
E20
SECTION
10
9