Component Maintenance Manual
12037 N Highway 99
Seminole, OK 74868
Phone (405) 382-0731
Fax (405) 382-0737
http://www.enviro-ok.com
SERVICING
TASK 21-00-23-60-801
13.0 R-134A AIR CONDITIONING SYSTEM SERVICING PROCEDURES
SUBTASK 21-00-23-99F-016
13.1 General:
13.1.1 Reclaiming the system (R-134A) refrigerant charge is required on systems before system
removal, after an accidental line break, component failure or when the system has
excessive leaks. Due to the chemical nature of the refrigerant, every precaution must be
taken to protect the service person from accidental exposure to the refrigerant. Follow all
service precautions previously outlined.
WARNING: SERVICE TECHNICIANS ARE ADVISED TO OBSERVE STANDARD SAFETY
PRECAUTIONS, SUCH AS WEARING PERSONAL SAFETY GEAR, TO PREVENT INJURY WHILE
PERFORMING SERVICE TO THE UNIT.
CAUTION: SERVICE TECHNICIANS MUST PREVENT CONTAMINATION OF INTERNAL SYSTEM
PLUMBING DURING ANY SERVICING AND/OR MAINTENANCE OPERATION. THIS INCLUDES NOT
ALLOWING THE RECEIVER DRYER TO BE EXPOSED TO ATMOSPHERIC CONDITIONS FOR ANY
LENGTH OF TIME. ALL PLUMBING LINES SHOULD REMAIN CAPPED WHENEVER POSSIBLE DURING
THE SERVICING OF THE SYSTEM.
WARNING: DUE TO THE EVER INCREASING NUMBER OF ALTERNATE REFRIGERANTS BEING
INTRODUCED ON THE MARKET, EXTREME CARE MUST BE TAKEN TO PREVENT THEIR USE IN THIS
SYSTEM. ONLY R-134A REFREFRIGERANT IS APPROVED FOR USE IN THIS AIR CONDITIONING
SYSTEM. ANY OTHER REFRIGERANT COULD CREATE A HAZARD TO BOTH THE AIRCRAFT AND
SERVICE PERSONNEL.
13.1.2 Tools, fixtures, equipment, or consumable items required:
• Small hand tools and socket set
• Vacuum pump, air or electric (0-30 in.h.g.)
• Refrigerant, R-134A
• R-134A charging manifold with gauges and hoses
• Thermometer, 0-150° F
• Adjustable inspection mirror
• Service light or flash light
• Shop towels
• RL100H or RL100E refrigerant oil
• External or aircraft power source, 200 AMPS.
• Reclaim/ Recycle Cart (R-134A)
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