Pack Controller - Primary Computer - Normal Control Function
Figure 014
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R **ON A/C 004-049, 055-099, 101-149, 151-199, 201-299, 301-399,
R (Ref. Fig. 014A) **ON A/C 401-499,
(Ref. Fig. 014B) **ON A/C 001-003, 051-054,
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R (Ref. Fig. 015A) **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299,
R (Ref. Fig. 016) **ON A/C 301-399,
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R (Ref. Fig. 016B) **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
(Ref. Fig. 017)
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Pack Controller - Primary Computer - Normal Control Function
Figure 014A
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Air Conditioning System Controller - Normal Control Function
Figure 014B
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Pack Controller - Secondary Computer - Back-up Control Function
Figure 015
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Pack Controller - Secondary Computer - Back-up Control Function
Figure 015A
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AIR COND Panel
Figure 016
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AIR COND Panel
R Figure 016A
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AIR COND Panel
R Figure 016B
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Pack Controller - Single Failures and Consequences
Figure 017
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A. Normal Operation In Normal operation the primary computer of the pack controller 7HH (27HH) controls the system. The pack controller gets a temperature reference as a demand signal from the zone controller 8HK. This demand signal, the preferred bypass valve 10HH (30HH) position and the measured water extractor outlet temperature, the bypass valve and ram-air outlet actuator position is used continuously to determine their necessary drive speeds. The speed is zero, when the water extractor outlet temperature gets to the required value and the bypass valve to the preferred position. The preferred bypass valve 10HH (30HH) position is normally 21 DEG. but is adjusted when necessary, dependent on pack inlet pressure. The ram-air inlet actuator 8HH (28HH) position is slaved to the actual ram-air outlet actuator 9HH (29HH) position. The water-extractor outlet temperatures are limited through the temperature demand signal from the zone controller 8HK. The upper limit is 70 DEG.C (158.00 DEG.F). The lower limits are as follows:
(1) One or two packs operation
----------------------------------------------------------------------------| 0 to 24000 ft | 5 DEG.C (41 DEG.F) | |--------------------------------------|-------------------------------------| | 24000 to 29000 ft | 0 DEG.C (32 DEG.F) | |--------------------------------------|-------------------------------------| | above 29000 ft | -30 DEG.C (-22 DEG.F) |
--------------------------------------|-------------------------------------
(2) Compressor outlet temperature limits
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| up to 180 DEG.C (385 DEG.F) | normal operation | |--------------------------------------|-------------------------------------| | 180 DEG.C (385 DEG.F) to | reduced closing | | 220 DEG.C (428 DEG.F) | | |--------------------------------------|-------------------------------------| | 220 DEG.C (428 DEG.F) to | ram-air outlet actuator can | | 222,5 DEG.C (432,5 DEG.F) | no longer be closed | |--------------------------------------|-------------------------------------| | 222,5 DEG.C (432,5 DEG.F) | ram air outlet actuator opens | | and above | at maximum speed | |--------------------------------------|-------------------------------------| | at 230 DEG.C (446 DEG.F) | pneumatic temperature sensor | | | starts to close the flow control | | | valve | |--------------------------------------|-------------------------------------| | at 260 DEG.C (500 DEG.F) | overheat warnings to the ECAM | | | and the pack switches on overhead | | | panel 30VU | ----------------------------------------------------------------------------
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