AIR COND Flashcards
HOW MANY PACKS
AND AIR SOURCES
2 PACKS
3 SOURCES
ENGINES
APU
HP GND AIR UNITS
PACK VALVES
TWO PACK VALVES PER PACK
THEY REGULATE THE QTY OF HOT BLEED AIR THAT FLOWS INTO EACH PACK
ROLE OF THE PACK
PROVIDE COLD AIR BY COOLING HOT BLEED AIR
BOTH PACKS OPERATE AUTO
AND INDEPENDENTLY OF EACH OTHER
EACH PACKS CONTAINS:
1 HEAT EXCHANGER USING EXTERNAL AIR
2 COOLING UNITS ACMs AIR CYCLE MACHINES
IF BOTH ACMs FAIL BLEED AIR IS COOLED BY HEAT EXCHANGER ONLY
THE PACK OPERATES IN BYPASS MODE
ECAM
REGUL
REFERS TO ACMs
WHAT CONTROLS PACK AND RELATED PACK VALVES
1 PACK CONTROLLER CONTROLS EACH PACK AND ITS RELATED PACK VALVES
PACK CONTROLLERS HAVE HOW MANY CHANNELS?
TWO INDEPENDENT CHANNELS
EACH IF THESE CHANNELS CAN CONTROL ONE ENTIRE PACK
IF BOTH CHANNELS FAIL THE PACK IS LOST
WHEN WILL PACK CONTROLLERS BE SHOWN ON BLEED SD
NOT NORMALLY SHOWN
ONLY WHEN ONE OR MORE CHANNELS FAIL BOTH PACK CONTROLLERS WILL BE SHOWN
THE ROLE OF THE MIXER UNIT
COLD AIR FROM PACKS IS COMBINED WITH RECYCLED COCKPIT AND CABIN AIR IN THE MIXER UNIT
PACKS AND MIXER UNIT ON BLEED AND COND SD
ON GND LP GND AIR CONNECTS TO
CONNECTED TO MIXER UNIT
NOT SHOWN ON SD
PRIMARY VENT FANS
4 VENTILATION FANS
REFERRED TO AS PRIMARY FANS
NOT NORMALLY ON COND SD UNLESS 1 FAILS
SECONDARY VENT FANS
9 SECONDARY FANS
BLOW AIR FROM UPPER DECK AND RECIRCULATE IT IN THE UPPER AND MAIN DECKS
NOT SHOWN SD
18 CONTROLLABLE ZONES
COCKPIT
7 UPPER DECK
8 MAIN DECK
2 CARGO ZONES BULK FWD
CREW REST COMPARTMENT
HOW IS EACH ZONE TEMP SET
ADJUSTED BY ADDING HOT BLEED AIR TO AIR FROM THE MIXER UNIT
HOT AIR IS ADDED VIA TWO HOT AIR VALVES AND ONE TRIM AIR VALVE PER CABIN ZONE
WHAT CONTROLS THE TEMP OF EACH ZONE
CONTROLLED BY TEMP CONTROLLER
TWO INDEPENDENT CHANNELS
EACH CHANNEL CAN CONTROL ALL ZONES
ONLY SHOWN COND SD IF A FAULT
BOTH PACKS FAIL
MIXER UNIT CAN RECEIVE AIR DIRECTLY FROM OUTSIDE VIA TWO EMERG RAM AIR INLETS