Installation of engine driven Vapor Cycle (Freon or Refrigerant R134a) air conditioner, heater or entire environmental control system (including both), in accordance with FAA approved Master Drawing List DL-206-1, Revision AM, dated December 6, 1995, or subsequent FAA approved Revision. View PDF on drs.faa.gov ↗

The STC PDF is authoritative: installation instructions, ICA requirements and limitations.