Piper PA-32RT-300T User Manual

COMPOUND
GAGE
PULL
26
TO 28
INCHES
VACUUM
LANCE
II
SERVICE
MANUAL
CHARGING
STAN
VACUUM
PUMP
PRESSURE
GAGE
NOTE:
OPEN
BOTH
SERVICE
VALVES
(COUNTERCLOCKWISE)
ONE TURN
Figure
14-6.
Evacuation
Hookup
14-13.
EVACUATING
THE
SYSTEM.
If the
system
has
been
operated
in
a discharged
condition
or
anytime
the
system
has
been
open
to
atmospheric
pressure,
the
receiver-dehydrator
must
be
replaced
and
the
system
evacuated
to remove
any
trapped
air
and
moisture
which
has
entered
it. A
vacuum
pump
capable
of
pulling
29
inches
of mercury
or
better
should
be
used.
As
we
lower
the
pressure
in
the
air
conditioning
system,
we
lower
the
boiling
temperature
of
the
water
(moisture)
that
may
be
present.
Then
we
are
able
to
pull
this
water,
in the
form
of vapor,
out
of
the
system.
The
following
table
demonstrates
the
effectiveness
of
moisture
removal
under
a given
vacuum.
I
System
Vacuum
Temperature
F.
COMPOUND
GAUGE
READING
IN
INCHES
OF
MERCURY
VACUUM
27.99
28.89
29.40
29.71
29.82
29.88
100
80
60
40
20
0
NOTE
For
each
1,000
feet
of
elevation
above
sea
level,
the
compound
gauge
reading
will
be
about
one
inch
lower,
numerically.
Issued:
1/3/78
ACCESSORIES
AND UTILITES
2K5

Piper PA-32RT-300T Specifications

General

Brand	Piper
Model	PA-32RT-300T
Category	Aircrafts
Language	English