12037 N Highway 99
Seminole, OK 74868
Phone (405) 382-0731
www.enviro-ok.com
www.safran‐
passenger
‐solutions.com
Copyright © 2020
Original Release
ATA 21‐00‐60
Page | 48
13.2.4.2.
Drain old oil into measuring cup to verify amount of oil being replaced.
CAUTION
: ONLY AN ENVIRO APPROVED TYPE OF OIL MAY BE USED IN THIS TYPE OF
COMPRESSOR.
CAUTION
: DO NOT OVERFILL COMPRESSOR WITH OIL OR SYSTEM PERFORMANCE WILL BE
AFFECTED.
13.2.4.3.
Measure an equal amount of new oil and add to compressor. Install oil plug and
tighten.
13.2.4.4.
Check system pressure per section 13.2. System is now ready for storage.
13.3.
System Off-Season/On-Aircraft Functional Tests:
NOTE
: If ambient temperature is low such that the system pressure is below ~30 PSIG (occurs
approximately below 35°F, 1°C) the pressure switch is designed to prevent the system from
activating the Compressor Module 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 CAN RESULT IN MAJOR DAMAGE OF THE R-134A COMPRESSOR.
13.3.1. During cold winter months, the system should be operated for 10-15 minutes every two
weeks to maintain a thin oil film on the compressor output shaft dynamic seal to prevent
shaft leakage.
13.3.2. Prior to turning on the air conditioning system (energizing the compressor drive), run
blowers on high speed for a minimum of 5 minutes. This will aid in warming the refrigerant
and bringing it up to an acceptable temperature enabling operation of the system.
13.4.
General System Component Storage procedures:
13.4.1. This section defines the procedures and requirements necessary if any component is to
be stored and not installed onto the aircraft immediately. The component should be stored
in a manner that will protect it from damage and contamination in an effort to ensure
component reliability and achieve a long service life for which the component is designed
13.4.1.1.
If component will be stored and not installed on the aircraft for any period of time, the
following preventive maintenance should be followed.
13.4.1.2.
Component is packaged and shipped in a manner designed to keep it protected from
damage and/or contamination. Should the component not be installed in an aircraft
immediately, it is desirable that it remain sealed and packaged in the original Enviro
Systems container. This will ensure maximum protection during the storage period.
13.4.1.3.
If the component is removed from the original packaging and is not installed on the
