Component Maintenance Manual
EFFECTIVITY: ALL
21-00-22
Page
15001
JULY 21, 2011
STORAGE
TASK 21-00-22-55-801
14.0 COMPRESSOR CONDENSER MODULE ASSEMBLY STORAGE PROCEDURES
SUBTASK 21-00-22-99F-017
14.1
General:
14.1.1
This section defines the procedures and requirements necessary if the Compressor
assembly is to be stored and not installed onto aircraft immediately. In addition, this section
defines the procedures and requirements for operation on the aircraft during the cold winter
months when the system is not typically needed or used. These requirements are needed
to maintain a thin film of oil on the Compressor shaft dynamic seal to prevent leakage.
NOTE
: If ambient temperature is below 50° F (10°C) the pressure switch is designed to keep the system from
operating and causing possible damage if operated for extended periods of time. In this case, it is
recommended that the aircraft be heated above this threshold to enable the system to operate.
CAUTION
: OPERATION OF THE SYSTEM AT LOW AMBIENT TEMPERATURES FOR MORE THAN 15
MINUTES COULD RESULT IN MAJOR DAMAGE OF THE R-12 COMPRESSOR.
SUBTASK 21-00-22-55-001
14.2
System Long Term Shelf Storage:
14.2.1
If unit will be stored for periods in excess of 12 months, the following preventive
maintenance should be followed for the compressor. These procedures should be
performed at 12 months from MFG date on unit and every 6 months thereafter for a
maximum of 36 months.
NOTE
:
When installing unit with MFG date in excess of 12 months prior to installation date, verify record of
preventive maintenance. If no maintenance record exists, contact Enviro Systems Inc. prior to installation.
14.2.2
For internal pressures within a range of 5-15 PSIG, rotate compressor by hand through a
minimum of 10 revolutions.
14.2.3
For internal pressures below 5 PSIG, system should be pressurized to 15 PSIG using
regulated dry Nitrogen. After pressurizing the system, rotate the compressor by hand
through a minimum of 10 revolutions.
14.2.4
If the system does not have any detectable pressure, the compressor oil must be checked
for contamination using the following procedures:
14.2.4.1
Remove compressor oil plug and insert a clean tie strap into oil fill hole. Remove the
strap to inspect the oil. Oil should have a clear to amber color. If oil shows specs of
black or other contamination, compressor oil should be drained and replaced.
