Piper Lance II User Manual

COMPOUND
PRESSURE
GAGE
C
TO SUCTION
SERVICE
VALVE
LANCE
II SERVICE
MANUAL
HIGH
PRESSURE
GAGE
TO DISCHARGE
SERVICE
VALVE
TO
VACUUM
PUMP
OR
REFRIGERANT
CYLINDER
Figure
14-3.
Test
Gauge
and
Manifold
Set
14-8.
TEST
GAUGE
AND
MANIFOLD
SET.
The
proper
testing
and
diagnosis
of
the
air
conditioning
system
require
that
a
manifold
gauge
set
be
attached
into
the
system.
This
set
consists
of
two
gauges
mounted
to
a manifold.
One
gauge
is
a
high
pressure
gauge
used
in
the
discharge
side
of
the
system.
The
other
is
a low
pressure
gauge
used
in
the
suction
side
of the
system.
The
manifold
is
a device
having
fittings
for
both
gauges
and
connection
hoses
with
provisions
for
controlling
the
flow
of
refrigerant
through
the
manifold.
See
Figures
14-3
and
14-4.
The
center
port
of the
manifold
set
is
used
for
charging
or
evacuation
procedures,
or any
other
service
that
may
be
necessary.
Both
the
high
and
low
side
of
the
manifold
have
hand
shut-off
valves.
When
the
hand
valve
is
turned
all
the
way
in,
in
a clockwise
direction,
the
manifold
is closed.
The
pressures
on
that
side
of
the
system
will,
however,
be
recorded
on
the
gauge
above
the
hose.
Cracking
the
hand
valve,
in
the
counterclockwise
direction,
opens
the
system
to
the
middle
service
port
of
the
manifold
set.
This
is
desirable
only
when
it
is
necessary
to
let
refrigerant
out
or
into
the
system.
Refer
to
Figures
14-3
and
14-4.
14-9.
CHECKING
THE
SYSTEM
FOR
LEAKS.
There
are
several
methods
of
doing
this
operation,
depending
on
the
type
of
equipment
which
is
available.
Two
methods
of
performing
this
check
will
be
covered
in
the
following
paragraphs.
Issued:
1/3/78
2K1
ACCESSORIES
AND
UTILITIES

Piper Lance II Specifications

General

Manufacturer	Piper Aircraft
Max Takeoff Weight	3, 600 lb (1, 633 kg)
Crew	1
Horsepower	300 hp
Seats	6
Length	27 ft 7 in (8.41 m)
Capacity	5 passengers