R **ON A/C 004-049, 055-099, 101-149, 151-199, 201-299, 301-399, 401-499,
The fresh air quantity for air conditioning is defined by heating and cooling requirements. Since the bleed air supply is always at a higher temperature than that required for passenger comfort, a means of cooling this air is accomplished by two air conditioning packs. Each pack includes two heat exchangers which use ambient ram air as a heat sink, and a three-wheel boot-strap air cycle machine (Compressor, turbine and fan), a high pressure water extractor circuit and a bypass valve. The two heat exchangers are attached to the cooling ram-air inlet. Each inlet has a regulator flap which operates automatically to control the cooling airflow through the heat exchangers. During take off and landing phases, the ram-air inlet doors are closed to prevent ingestion of foreign matter which may damage or contaminate the heat exchangers.
For the complete description of the environmental control system refer to 21-60-00.
A. Flow Control and Indication (Ref. 21-51-00) The flow control and indication system controls the quantity of air supplied to the air conditioning packs.
R 1EFF : ALL 1 21-50-00Page 6 1 1 Aug 01/05 1 1 1CES 1
B. Air Cooling System (Ref. 21-52-00) The air cooling system cools the hot bleed air and then delivers it to the distribution system.
C. Pack Cooling - Air Control (Ref. 21-53-00) The pack cooling air control is done with components of the pack temperature control system (Ref. 21-61-00).
D. Emergency Ram-Air Inlet (Ref. 21-55-00) The emergency ram-air inlet provides ram-air for ventilation of the aircraft in case of both packs OFF (This function can only be used during unpressurized flight).
R 1EFF : 004-049, 055-099, 101-149, 151-199, 1 21-50-00Page 7 1201-299, 301-399, 401-499, 1Aug 01/05 1 1 1CES 1 FLOW CONTROL AND INDICATING - DESCRIPTION AND OPERATION
_______________________________________________________
1. General
_______
**ON A/C 001-049, 101-105, 151-199,
High pressure air is supplied to the air conditioning system from the main pneumatic system. This air goes through two ozone filters 100HM (101HM) and two flow-control valves 11HB (8HB) to two identical independent air conditioning packs 10HM (11HM).
R **ON A/C 051-099, 106-149, 201-299, 301-399,
High pressure air is supplied to the air conditioning system from the main pneumatic system. This air goes through two flow control valves 11HB (8HB) to two identical independent air conditioning packs 10HM (11HM).
R **ON A/C 401-499,
High pressure air is supplied to the air conditioning system from the main pneumatic system. This air goes through two flow control units 23HB (24HB) to two identical independent air conditioning packs 10HM (11HM).
**ON A/C ALL
2. Component Location
__________________
**ON A/C 001-003,
(Ref. Fig. 001)
**ON A/C 004-049, 101-105,
(Ref. Fig. 001A)
**ON A/C 051-054,
(Ref. Fig. 001B)
R Flow Control and Indication - Component Location Figure 001
1EFF : 001-003, 1 21-51-00Page 2 1 1 Nov 01/00 1 1 1CES 1
Flow Control and Indication - Component Location
Figure 001A
R 1EFF : 004-049, 101-105, 1 21-51-00Page 3 1 1 May 01/05 1 1 1CES 1R Flow Control and Indication - Component Location R Figure 001B
R 1EFF : 051-054, 1 21-51-00Page 4 1 1 May 01/05 1 1 1CES 1
R **ON A/C 055-099, 106-149, 201-299,
R (Ref. Fig. 001C) **ON A/C 151-199,
R (Ref. Fig. 001D) **ON A/C 301-399,
R (Ref. Fig. 001E) **ON A/C 401-499,
R (Ref. Fig. 001F) **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299,
R (Ref. Fig. 002) **ON A/C 301-399,
R (Ref. Fig. 002A) **ON A/C 401-499,
R (Ref. Fig. 002B)
Flow Control and Indication - Component Location
Figure 001C
R 1EFF : 055-099, 106-149, 201-299, 1 21-51-00Page 6 1 1 Aug 01/05 1 1 1CES 1
Flow Control and Indication - Component Location R Figure 001D
R 1EFF : 151-199, 1 21-51-00Page 7 1 1 Aug 01/05 1 1 1CES 1
Flow Control and Indication - Component Location R Figure 001E
R 1EFF : 301-399, 1 21-51-00Page 8 1 1 Aug 01/05 1 1 1CES 1
Flow Control and Indication - Component Location R Figure 001F
R 1EFF : 401-499, 1 21-51-00Page 9 1 1 Aug 01/05 1 1 1CES 1
Flow Control and Indication - Component Location
Figure 002
R 1EFF : 001-049, 051-099, 101-149, 151-199, 1 21-51-00Page 10 1201-299, 1Aug 01/05 1 1 1CES 1
Flow Control and Indication - Component Location R Figure 002A
R 1EFF : 301-399, 1 21-51-00Page 11 1 1 Aug 01/05 1 1 1CES 1
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