Downloaded from https://www.everyspec.com MIL-STD-1808C w/CHANGE 1 SYSTEM SUB-SYSTEM TITLE DEFINITION 21 AIR CONDITIONING The subsystem components that furnish pressurization, heating, cooling, moisture control, filtering, and treating of the air used to ventilate the areas of the fuselage within the pressure seals. Includes cabin supercharger, equipment cooling, heating, fuel system heating, expansion turbine, valves, scoops, ducts, etc. 00 GENERAL 10 COMPRESSION The portion of the system and its controls supplying compressed air to the cabin. Includes controls and indicating systems related to the compressors, wiring, etc.
Does not include the pressure control and indicating system for the cabin pressurization. 20 DISTRIBUTION The portion of the system used to induct and distribute air. Includes equipment rack cooling systems, blowers, scoops, ducting, inlets, check valves, wiring, etc. Does not include valves that are part of pressurization and temperature control. 30 PRESSURIZATION CONTROL The portion of the system used to control the pressure within the fuselage. Includes control valves, relief valves, indicators, switches, amplifiers, wiring, etc. 40 HEATING The portion of the system and its controls supplying heated air to the cabin.
Includes heater units, fuel system and control, ignition, indicating systems related to heater operation, wiring, etc. Does not include the temperature control and indicating systems. 50 COOLING The portion of the system and its controls supplying cooled air to the cabin. Includes the cooling unit, indicating systems related to the cooler operation, wiring, etc. Does not include temperature control and indicating systems. 23