What is the AC PACK temperature range?

What is the AC PACK temperature range?

• A. 0C - 20C
• B. 5C - 85C
• C. -10C - 50C
• D. 10C - 60C

Answer: (B)

AC PACK temperature range defines the allowable temperature of air exiting the air conditioning packs that condition cabin air. The CRJ-550 ECS uses packs to cool or heat air before it’s supplied to the cabin and cockpit, and the system is designed to operate across a wide discharge temperature span. The specified range, 5°C to 85°C, shows it can provide sufficiently cold air for cooling in hot conditions and tolerate higher discharge temperatures when heating or under high ambient/bleed conditions, while staying within safe limits for the ducts and equipment. The cabin temperature controller uses this range to properly blend and regulate air so cabin comfort can be maintained. If the pack discharge temperature ever approaches these limits, the system protections and indications help ensure safe operation.

AC PACK temperature range defines the allowable temperature of air exiting the air conditioning packs that condition cabin air. The CRJ-550 ECS uses packs to cool or heat air before it’s supplied to the cabin and cockpit, and the system is designed to operate across a wide discharge temperature span. The specified range, 5°C to 85°C, shows it can provide sufficiently cold air for cooling in hot conditions and tolerate higher discharge temperatures when heating or under high ambient/bleed conditions, while staying within safe limits for the ducts and equipment. The cabin temperature controller uses this range to properly blend and regulate air so cabin comfort can be maintained. If the pack discharge temperature ever approaches these limits, the system protections and indications help ensure safe operation.