Raytheon Beech Baron E55 - Page 471

Raytheon
Aircraft
tompany
BARON
55
AND
58 SHOP
MANUAL
EVACUATING
THE
SYSTEII´•I
Using
a
recycle/recovery
service
unit,
evacuate
the
system
as
follows:
a.
Attach
the
LO service
hose
of
the
recycle/recovery
unit
to
the
suction
port.
b.
Attach
the
HI
service hose
to
the
discharge port.
c.
Adjust
the
vacuum
to
control
the turbulence
of
the oil
in
the
pump.
d.
As the
pump-down
progresses
and the
turbulence
reduces,
gradually
open
the
vacuum
and HI
and
LO
valves
until
they
are
fully
open
for
maximum
evacuation
efficiency.
e.
When
the
pressure
is down
to
about 200
microns,
close
the
valve
to
permit
continuing
the
pump-down.
f. The
system
must
be evacuated
to
125
microns
or
lower.
FORWARD
EVAPORATOR BLOWER MODULE
REMOVAL
a.
Gain
access
to the
forward
evaporator
blower
module
through
the
forward
baggage compartment
(refer
toFigure
8).
I
b.
The
module
is located
to
the
rear
left
side of the forward
baggage
compartment.
c.
Remove
the blanket
from the floor.
d.
Remove
the
screws
from
the
metal
guard
around the
evaporator
module
and
remove
the
guard
from
the
airplane.
e.
Tag
and
remove
the
electrical
wiring
from
the
evaporator
blower
module.
IWARNINO)
WARNING
Due
to
the
air
quality
control
regulations
enacted
in
the
United
States,
R-12
and
R-134a
refrigerant
cannot
be
vented
into the
atmosphere.
When
performing
maintenance
on
the
air
I
conditioning system
where
R-12
or
R-134a
can
escape
from the
system,
evacuate
the
system
with
a
recovery
or
recycle
servicing
unit that
will
salvage
the
refrigerant.
The
air
conditioning
system
is
a
high
pressure
system,
Before
disconnecting
a
refrigerant
I
line,
the
system
must
be
discharged
with
a
recovery
servicing
unit.
Purge
the
entire
system
to
a
125
micron
level.
I
A
face
shield
should be
worn
when
performing
maintenance
on
the lines because
refrigerant
coming
in
contact
with
the
eyes
can
cause
loss
of
sight.
Do
not
smoke
when
servicing
the
system
with R-12
or
R-134a because
it
converts
to
a
highly
toxic
gas
when
exposed
to
an
open
flame.
f.
Using
a
recycle/recovery
service
unit,
discharge
the
system
slowly, through
the
service
ports
under
the
copilot’s
seat,
until
all
pressure
is
bled off.
E20
SECTION
10
33