Mooney M20R - Air Conditioning System Off Season Functional Tests; Avoid Use of Compressed Air; Recovery of Refrigerant; Refrigerant Handling

SERVICE
AND
MAINTENANCE
MANUAL
M20R
MOONEY
AIRCRAFT
CORPORATION
TYPE
MAINTENANCE
SERVICE
HOURS
COMPRESSOR
ASSEMBLY
(R-134a)
Leak
check,
shaft
seal
500-800
Bearing
inspection.
1000-1500
Bearing
replacement
On
Condition
Oil
level
check
On
Condition
ATTACHMENT
BRACKET/HARDWARE
On
Condition
Inspect
100
Hrs.
I
COMPRESSOR
DRIVE
BELT
Visual
inspection
500-800
Tension
8
alignment
800-1000
Replacement
On
Condition
RECEIVER-DRYER
ASSEMBLY
Refrigerant
charge
level
500-800
Replacement
1000-1500
or
after
compressor
failure/line
rupture
EXPANSION
VALVE
Adjustment
As
Required
Replacement
On
Condition
EVAPORATOR
BLOWER
MOTOR
Brush
inspection
None
Brush
replacement
Not
replaceable
Service
Life.
1500-2000
POWER
CONTACTOR
Inspection
1000
On
Condition
ReplacementCONDENSERIEVAPORATdR
COIL
Inspection
500-800
Replacement
On
Condition
PRESSURE
SWITCH
Calibration
check
1000
Replacement
On
Condition
REFRIGERANT
SYSTEM
Performance
check.
500-800
Visualinspection
500-800
2.
AIR
CONDITIONING
SYSTEM
"OFF
SEASON"
Do not
discharge
R-134a
refrigerant
into
the atmos-
FUNCTIONAL
TESTS
phere.
Although
its
ozone
depletion
potential
is
zero,
it
During
cold
winter
months,
the
system
should
be
oper-
can
have
an
effect
on
global
warming.
In
the
United
ated
for
a
minimum
of
15 minutes
every
two
weeks
to
States,
recovery
and
recycling
are
mandated
by
the
maintain a
thin
film
of oil
on
the
compressor
drive
shaft
Clean
Air
Act.
dynamic
seal
to
prevent
leakage.
Refrigerant
recovery/recycling
service
equipment
must
NOTE
be
approved
for
use
with
R-134a
refrigerant.
Recycling
If
ambient
temperature
is
below
320
F
(00
C)
the
machines
must
be
approved
by
Underwriters
Laborato-
pressure
switch
may
require
an
electrical
jumper
to
ries
and
meet
SAE
standard
J2210
and
SAE
standard
allow
the
compressor
dnve
motor
power
contactor
J2099
for
refrigerant
purity.
to
ererglze
and
enable
system
to
operate.
3.
Ventilation
CAUTION
Keep
refrigerants
and
oils
away
from
open
flames.
Re-
Extended
operation
of
the
system
at
low
ambient
frigerants
can
produce
poisonous
gasses
in the
pres-
temperatures
could
result
in
major
damage
of the
,,,,,f,flame.
Work
in
a
well
ventilated area
nad
avoid
R-134a
compressor.
breath
ing
refrigera
nt/lubrica
nt
vapor
mist
if
accidental
21-59-00
SERVICE
PRECAUIIONS
discharge
occurs.
4.
Avoid
use
of
compressed
air
i.
Refrigerant
handling
Always
wear
eye
and
hand
protection
when
servicing
an
Do
not
introduce
compressed
air
or
oxygen
into
an
air-
airconditioning system.
Liquid
refrigerant
can
cause
conditioning
system
or
refrigerant
container.
R-134a
in
frostbite
andlor
blindness.
the
presence
of
air
or
oxygen
above
atmospheric
pres-
sure
may
form
a
combustible
mixture.
2.
Recovery
of
refrigerant
REV.
10-98
21-59-00
15
Island Enterprises