PACK TEMPERATURE CONTROL - DESCRIPTION AND OPERATION

** ON A/C NOT FOR ALL

1. General
The pack temperature control system controls the pack outlet temperature and sets its maximum and minimum limits. Two pack controllers control the system.
Each pack controller 7HH (27HH) controls the two major parameters of its related pack:

the pack outlet temperature (through the water extractor outlet temperature),
the ram-air cooling flow, which is kept to a minimum for fuel economy.

Each pack controller consists of two computers, one primary and one electrically independent secondary computer. The primary computer is capable of modulating the system parameters to their full extent, thus opitimizing the system performance. The secondary computer gives a reduced level of optimization when it operates as a back-up in the event of the primary computer failure.
The pack temperature control system controls the pack outlet temperature and sets its maximum and minimum limits. Two ACSC control the system.
Each ACSC 47HH (57HH) controls the two major parameters of its related pack:

the pack outlet temperature (through the water extractor outlet temperature),
the ram-air cooling flow, which is kept to a minimum for fuel economy.

Each ACSC consists of two indepent lanes.

** ON A/C NOT FOR ALL

2. Component Location

Pack Temperature Control - Component Location ** ON A/C NOT FOR ALL

FIN	FUNCTIONAL DESIGNATION	PANEL	ZONE	ATA REF
** ON A/C NOT FOR ALL
7HH	P1 CONTROLLER	95VU	121	21-61-34
** ON A/C NOT FOR ALL
8HH	P1 RAM AIR IN ACTUATOR	191KB	191	21-61-51
** ON A/C NOT FOR ALL
8HH	P1 RAM AIR IN ACTUATOR		191	21-61-51
** ON A/C NOT FOR ALL
10HM9	SENSOR-COMPRESSOR PNEUMATIC OVHT	191KB	191	21-61-18
10HM10	SENSOR-PACK OUTLET PNEUMATIC	191KB	191	21-61-19
** ON A/C ALL
10HH	VALVE-TURBINE BYPASS	191KB	191	21-61-53
** ON A/C NOT FOR ALL
11HM9	SENSOR-COMPRESSOR PNEUMATIC OVHT	192KB	192	21-61-18
11HM10	SENSOR-PACK OUTLET PNEUMATIC	192KB	192	21-61-19
** ON A/C ALL
11HH	SENSOR-WATER EXTRACTOR TEMPERATURE	191KB	191	21-61-13
12HH	SENSOR-COMPRESSOR TEMPERATURE	191KB	191	21-61-11
13HH	SENSOR-PACK OUTLET TEMP	191KB	191	21-61-15
** ON A/C NOT FOR ALL
14HH	P1 PACK DISCH PRESS SENSOR		191	21-61-14
** ON A/C NOT FOR ALL
15HH	SENSOR-COMPRESSOR OVHT	191KB	191	21-61-12
** ON A/C NOT FOR ALL
16HH	P1 PRESS INL SENSOR		192	21-61-16
** ON A/C ALL
17HH	VALVE-ANTI ICE	191KB	191	21-61-41
** ON A/C NOT FOR ALL
20HH	P2 PACK DISCH PRESS SENSOR		192	21-61-14
** ON A/C NOT FOR ALL
27HH	P2 CONTROLLER	96VU	122	21-61-34
** ON A/C NOT FOR ALL
28HH	P2 RAM AIR IN ACTUATOR	192KB	192	21-61-51
** ON A/C NOT FOR ALL
28HH	P2 RAM AIR IN ACTUATOR		192	21-61-51
** ON A/C ALL
30HH	VALVE-TURBINE BYPASS	192KB	192	21-61-53
31HH	SENSOR-WATER EXTRACTOR TEMPERATURE	192KB	192	21-61-13
32HH	SENSOR-COMPRESSOR TEMPERATURE	192KB	192	21-61-11
34HH	SENSOR-PACK OUTLET TEMP	192KB	192	21-61-15
** ON A/C NOT FOR ALL
35HH	SENSOR-COMPRESSOR OVHT	192KB	192	21-61-12
** ON A/C NOT FOR ALL
36HH	P2 PRESS INL SENSOR		191	21-61-16
** ON A/C ALL
37HH	VALVE-ANTI ICE	192KB	192	21-61-41
** ON A/C NOT FOR ALL
47HH	CONT-AIR COND SYSTEM 1		121	21-61-34
57HH	CONT-AIR COND SYSTEM 2		122	21-61-34

** ON A/C NOT FOR ALL

3. System Description

Temperature Control - Diagram ** ON A/C NOT FOR ALL

During normal operation, the zone controller 8HK sends the required pack outlet temperature to the pack controllers 7HH (27HH). To get the pack outlet temperature, the pack controller modulates the bypass valve 10HH (30HH) and the ram-air inlet flaps in a predetermind sequence. This sequence is a compromise between a minimum ram airflow while maintaining adequate heat transfer rates and sufficient pack flow. For maximum cooling, ram-air flaps are fully open and the bypass valve is fully closed. For maximum heating, the ram-air flaps are nearly closed and the bypass valve fully open. The bypass valve will ensure sufficient flow through the air-cycle machine to stop the speed falling below idle.
During takeoff and landing, the ram air inlet flaps will be driven fully closed to stop the ingestion of foreign matter.
During normal operation, the ACSC 47HH (57HH) calculates the required mixer outlet temperature. To get the pack outlet temperature, the ACSC modulates the bypass valve 10HH (30HH) and the ram-air inlet flap in a predetermind sequence. This sequence is a compromise between a minimum ram airflow while maintaining adequate heat transfer rates and sufficient pack flow. For maximum cooling, the ram-air flap is fully open and the bypass valve is fully closed. For maximum heating, the ram-air flap is nearly closed and the bypass valve fully open. The bypass valve will ensure sufficient flow through the air-cycle machine to stop the speed falling below idle.
During takeoff and landing, the ram air inlet flaps will be driven in the fully closed position to avoid the ingestion of foreign matter.

A. Anti-Ice Valves
The anti-ice valves 17HH (37HH) are installed in the ducts to the turbines of the air-cycle machines 10HM1 (11HM1) upstream of the primary heat exchangers 10HM6 (11HM6). They have two functions.

(1) Anti-Icing
The anti-ice valves are usually closed. An anti-ice valve opens if the delta-P sensors of the anti-ice valve find across the condensers 10HM2 (11HM2) an unusual difference in pressure (ice in the condensers is assumed). Hot bleed air is supplied to the air-cycle machines outlet to melt the ice in the condensers and downstream equipment.

(2) Temperature Control
If there is a loss of a pack controller 7HH (27HH) the anti-ice valves control the pack outlet temperature. They adjust the quantity of hot bleed air added to the air-cycle machine outlets. The pack outlet temperature (measured by the pack discharge pneumatic-sensors 10HM10 (11HM10)) is constant approx. 15 deg.C (59.00 deg.F).

B. Solenoid Valves
The solenoid valves 25HH (40HH) are installed in the control line between the outlet of the air cycle machines 10HM1 (11HM1) and the differential pressure regulator of the Anti-Ice Valves 17HH (30HH).
The solenoid valves stop the air supply to the differential pressure regulator of the anti-ice valves in the back-up mode.

C. Bypass Valves
The bypass valves 10HH (30HH) are installed in the ducts downstream of the primary exchangers 10HM6 (11HM6). They split the hot airflow between the air- cycle machines and a bypass (which goes to the turbine outlet).

The bypass valves 10HH (30HH) are installed in the ducts downstream of the primary exchangers 10HM6 (11HM6). They split the hot airflow between the air- cycle machines and a bypass (which goes to the turbine outlet).
A bypass valve opens if the pack differential pressure sensor detects an unusual difference in pressure between the turbine outlet and the cabin (underfloor) pressure unusual difference in pressure (ice in the condensers is assumed). By opening of the bypass valve hot bleed air is supplied to the air-cycle machines outlet to melt the ice in the condensers and downstream equipment.

D. Temperature Sensors
The temperature sensors are installed to send temperature data to the pack controllers 7HH (27HH).
The temperature sensors are installed to send temperature data to the ACSC's 47HH (57HH).

(1) The compressor-overheat sensors 15HH (35HH) are installed between the compressors of the air-cycle machines 10HM1 (11HM1) and the main heat exchangers 10HM7 (11HM7).

(2) The compressor discharge temperature-sensors 12HH (32HH) are installed between the compressors of the air-cycle machines 10HM1 (11HM1) and the main heat exchangers 10HM7 (11HM7).

(3) The water extractor temperature-sensors 11HH (31HH) are installed in the water extractors 10HM8 (11HM8) upstream of the reheaters 10HM3 (11HM3).

(4) The pack discharge temperature-sensors 13HH (34HH) are installed at the pack outlet (close to the pack outlet pneumatic-sensor).

(5) The compressor discharge temperature-sensors 12HH (32HH) are installed between the compressors of the air-cycle machines 10HM1 (11HM1) and the main heat exchangers 10HM7 (11HM7).

(6) The water extractor temperature-sensors 11HH (31HH) (pack temperature sensors) are installed in the water extractors 10HM8 (11HM8) upstream of the reheaters 10HM3 (11HM3).

(7) The pack discharge temperature-sensors 13HH (34HH) are installed at the unpressurized side of the bulk head close to the pack discharge duct (one per pack).

E. Sensors
The pneumatic compressor-overheat sensors 10HM9 (11HM9) are installed downstream of the compressors of the air-cycle machines 10HM1 (11HM1). They are connected to the flow control valves 8HB (11HB). If the compressor outlet temperature increases above a predetermined value (aprrox. 230 deg.C), the pneumatic compressor overheat-sensor gives a signal to reduce the airflow via the flow control valve.

The pressure sensors are installed to send pressure data to the ACSC's 47HH (57HH). The Pack Discharge Pressure Sensor (PDPS) 14HH (20HH) is mounted on each side of the air conditioning bay center beam.

F. Pack Outlet Pneumatic-Sensors
The pack outlet pneumatic sensors 10HM10 (11HM10) are installed on the condensers 10HM2 (11HM2). They are connected to the anti-ice valves 17HH (37HH). If there is a failure in a pack controller 7HH (27HH), the pneumatic sensor transmits the pressure to the applicable anti-ice valve. If the pressure at a pneumatic temperature sensor increases or decreases (because of an increase or decrease in temperature) the anti-ice valve opens or closes to maintain the pack outlet temperature at about 15 deg.C (59.00 deg.F).

G. Controller
The pack controllers 7HH (27HH) are the computers for the pack temperature control-system. They do the calculations necessary for operation of the air conditioning packs 10HM (11HM). They are installed in the racks 95VU and 96VU of the avionics compartment. They have the following functions:

to receive, to calculate and to send the necessary signals (ARINC 429 data bus) to the zone temperature controller 8HK,
to send the necessary signals to the P/BSW 6HB (7HB) on the panel 30VU in the cockpit,
to calculate and send the necessary signals to the air-inlet flap actuators 8HH (28HH) to open and close the ram air inlets,
to do the Built-In Test Equipment (BITE) tests,
to monitor the temperature in the ducts of the air conditioning packs and to do the correct steps if an overheat occurs,
to calculate and send the necessary signals to the flow control valves 8HB (11HB),
to control the applicable bypass valve 10HH (30HH) for pack temperature control.

The Air Conditioning System Controllers (ACSC) 47HH (57HH) do also the temperature control of the packs. They do the calculations necessary for operation of the air conditioning packs 10HM (11HM). They are installed in the racks 95VU and 96VU of the avionics compartment. They have the following functions:

to send the necessary signals to the P/BSW 6HB (7HB) on the panel 30VU in the cockpit,
to calculate and send the necessary signals to the air-inlet flap actuators 8HH (28HH) to open and close the ram air inlets,
to do the Built-In Test Equipment (BITE) tests,
to monitor the temperature in the ducts of the air conditioning packs and to do the correct steps if an overheat occurs,
to calculate and send the necessary signals to the flow control valves 23HB (24HB),
to control the applicable bypass valve 10HH (30HH) for pack temperature control.

H. Ram Air-Inlet Actuators
The air-inlet flap actuators 8HH (28HH) open and close the ram air inlets as necessary. They receive signals from the pack controllers 7HH (27HH). They are installed on the ram air inlets (LH and RH) in the fuselage belly fairing.

The air-inlet flap actuators 8HH (28HH) open and close the ram air inlets as necessary. They receive signals from the ACSC's 47HH (57HH). They are installed on the ram air inlets (LH and RH) in the fuselage belly fairing.

I. Pack Inlet Pressure-Sensors
The pressure sensors 16HH (36HH) sense the pressure of the bleed air that enters the air conditioning packs 10HM (11HM). They send a signal to the pack controllers 7HH (27HH). They are installed upstream of the flow control valves 8HB (11HB).

** ON A/C NOT FOR ALL

4. Power Supply

Pack 1 Temperature Control - Electrical Schematic ** ON A/C NOT FOR ALL

Pack 2 Temperature Control - Electrical Schematic ** ON A/C NOT FOR ALL

** ON A/C NOT FOR ALL

5. Interface

Air Conditioning System Controller - Interface ** ON A/C NOT FOR ALL

A. Explanations to the Parameter List
The parameter list is organized according to the connected ARINC 429 data buses.
The connected systems (e.g. FAC, ECU, EEC, etc.) and the corresponding ATA chapter numbers are stated in the header on the left side of each page of the parameter lists.
The columns are described as follows:

----------------------------------------------------------------

Column ! Description

----------------!-----------------------------------------------

1st ! EQ.SYS.LAB.SDI = Parameternumber

SYS.LAB.SDI !

! System number: According to the system which is

! sending out the corresponding parameter:

! 1 for system one

! 2 for system two

! 3 for system three

! Label of the parameter, octal value

! according to ARINC 429.

! SDI states the Source/Destination Identifier

! which is used by the system for the

! corresponding parameter:

! 00 means SDI 00 (0)

! 01 means SDI 01 (1)

! 10 means SDI 10 (2)

! 11 means SDI 11 (3)

---------------!------------------------------------------------

2nd ! PARAMETER

PARAMETER ! Parameter name

---------------!------------------------------------------------

3rd ! RANGE

RANGE !

! Three different types of ranges are shown in

! this column:

! The first one, indicated by a 'W' (WORDRANGE),

! is related to the ARINC 429 data bus. This

! shows the maximum value of the parameter that

! can be transferred on the bus. This

! depends on the number of data bits (see

! column DATA BITS) and the resolution ('R') of

! the parameter (see column ACCURACY).

! The second one, with no specific indication,

! shows the normal operational range of the

! parameter.

! The third one is related to the ARINC 429

! Discrete Data Words. There are two states:

! 'bit status 0' or 'bit status 1'. They

! indicate the true condition of the

! corresponding data word bit position.

---------------!----------------------------------------

4th ! ACCURACY

ACCURACY !

! Two different types of values are shown

! in this column:

! The first one, indicated by an 'R'

! (RESOLUTION) is related to the ARINC

! 429 data bus. It also shows the

! resolution of the data word. The second

! one, with no specific indication, shows

! the total accuracy of the parameter.

---------------!-----------------------------------------

5th ! SIGN BIT

SIGN BIT !

! This column shows whether a sign bit

! is available and in which bit position

! of the data word it is situated.

---------------!-----------------------------------------

6th ! DATA BITS

DATA BITS !

! Describes the number of data bits not

! including the sign bit. 'A' and a number

! means the discrete bit position in the

! ARINC 429 data word.

! For BCD coded data words the number of

! significant data digits is shown,

! indicated by '(1)'.

---------------!----------------------------------------------

7th ! UPD/sec

UPD/sec !

! This column shows how many times the

! parameter will be transmitted by the source

! system.

---------------!----------------------------------------------

8th ! CODE

CODE !

! BNR = binary data word

! BCD = binary coded decimal data word

! ISO = data word coded in ISO 5 Code

! DIS = discrete data word

! HEX = hexadecimal coded

! OCT = octal coded

! HYB = mixed code;

! e.g. : bit 11 to 16 DIS

! bit 17 to 28 BNR

---------------!----------------------------------------------

9th ! ALPHA CODING

ALPHA CODING !

! This column shows the mnemonic for the

! parameter (if available). By entering

! this code via the MCDU, the current

! parameter-value will be shown on the

! display. The value from both systems

! (if available) will be shown.

---------------!----------------------------------------------

10th ! This column shows the source origin, its

Source ! bus number, ATA Ref., and its label.

EQPT !

BUS NR !

ATA. REF !

CONV !

---------------!----------------------------------------------

Pack Temperature Control Parameter List EQPT: 8E

-------------------------------------------------------------------------------

| PARAMETER LIST PARAMETER CHARACTERISTICS (NUMERIC) |

-------------------------------------------------------------------------------

-------------------------------------------------------------------------------

!1.062.11 !DISCRETE ! ! ! ! ! ! ! ! !

!2.062.00 !DATA WORD ! ! ! ! 7 ! 2 !DIS !PSW1 ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !FLOW CONTR! ! ! ! ! ! ! ! !

! !VALVE ! ! ! ! ! ! ! ! !

! !STATUS ! ! ! ! ! ! ! ! !

! !CLOSE !bit status 1! ! !A 11! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SECONDARY ! ! ! ! ! ! ! ! !

! !PACK CON- ! ! ! ! ! ! ! ! !

! !TROL INOP !bit status 1! ! !A 12! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !PACK COM- ! ! ! ! ! ! ! ! !

! !PRESSOR ! ! ! ! ! ! ! ! !

! !OUTLET ! ! ! ! ! ! ! ! !

! !TEMP ! ! ! ! ! ! ! ! !

! !4 TIMES ! ! ! ! ! ! ! ! !

! !HIGHER ! ! ! ! ! ! ! ! !

! !THAN ! ! ! ! ! ! ! ! !

! !230 Deg C !bit status 1! ! !A 13! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !PACK COM- ! ! ! ! ! ! ! ! !

! !PRESSOR ! ! ! ! ! ! ! ! !

! !OUTLET ! ! ! ! ! ! ! ! !

! !TEMP > ! ! ! ! ! ! ! ! !

! !260 DEG C ! ! ! ! ! ! ! ! !

! !OR PACK ! ! ! ! ! ! ! ! !

! !OUTLET > ! ! ! ! ! ! ! ! !

! !95 DEG C !bit status 1! ! !A 14! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !MAIN PACK ! ! ! ! ! ! ! ! !

! !CONTROL ! ! ! ! ! ! ! ! !

! !INOP !bit status 1! ! !A 15! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

!1.062.11 !PACK 1 ! ! ! ! ! ! ! ! !

! !FLOW SET- ! ! ! ! ! ! ! ! !

! !TING INOP !bit status 1! ! !A 16! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

!2.062.00 !PACK 2 ! ! ! ! ! ! ! ! !

! !FLOW SET- ! ! ! ! ! ! ! ! !

! !TING INOP !bit status 1! ! !A 16! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 17! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 18! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 19! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 20! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 21! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 22! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 23! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 24! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 25! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 26! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 27! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 28! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !WORD ! ! ! ! ! ! ! ! !

! !VALIDITY ! ! ! ! ! ! ! ! !

! !(VALID) !bit status 1! ! !A 29! ! ! ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

Pack Temperature Control Parameter List EQPT: 8E

-------------------------------------------------------------------------------

| PARAMETER LIST PARAMETER CHARACTERISTICS (NUMERIC) |

-------------------------------------------------------------------------------

-------------------------------------------------------------------------------

!1.062.11 !DISCRETE ! ! ! ! ! ! ! ! !

!2.062.00 !DATA WORD ! ! ! ! 7 ! 2 !DIS !PSW1 ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !FLOW CONTR! ! ! ! ! ! ! ! !

! !VALVE ! ! ! ! ! ! ! ! !

! !STATUS ! ! ! ! ! ! ! ! !

! !CLOSE !bit status 1! ! !A 11! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !PACK COM- ! ! ! ! ! ! ! ! !

! !PRESSOR ! ! ! ! ! ! ! ! !

! !DISCHARGE ! ! ! ! ! ! ! ! !

! !TEMP > ! ! ! ! ! ! ! ! !

! !260 DEG C !bit status 1! ! !A 14! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

!1.062.11 !PACK 1 ! ! ! ! ! ! ! ! !

! !FLOW SET- ! ! ! ! ! ! ! ! !

! !TING INOP !bit status 1! ! !A 16! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !FCV ! ! ! ! ! ! ! ! !

! !COMMAND/ ! ! ! ! ! ! ! ! !

! !STATUS ! ! ! ! ! ! ! ! !

! !DISAGREE !bit status 1! ! !A 17! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !PACK 1 ! ! ! ! ! ! ! ! !

! !OVERHEAT ! ! ! ! ! ! ! ! !

! !PDS > 88 ! ! ! ! ! ! ! ! !

! !DEG.C !bit status 1! ! !A 18! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !PACK 1 ! ! ! ! ! ! ! ! !

! !REGUL ! ! ! ! ! ! ! ! !

! !FAULT ! ! ! ! ! ! ! ! !

! !CAUSED BY:!bit status 1! ! !A 19! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !BPV FAULT !bit status 1! ! !A 20! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !RAIA FAULT!bit status 1! ! !A 20! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !PDPS/CDPS ! ! ! ! ! ! ! ! !

! !ICING ! ! ! ! ! ! ! ! !

! !CONDITION !bit status 1! ! !A 22! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 23! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 24! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 25! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 26! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 27! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 28! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !WORD ! ! ! ! ! ! ! ! !

! !VALIDITY ! ! ! ! ! ! ! ! !

! !(VALID) !bit status 1! ! !A 29! ! ! ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

Pack Temperature Control Parameter List EQPT: 8E

-------------------------------------------------------------------------------

| PARAMETER LIST PARAMETER CHARACTERISTICS (NUMERIC) |

-------------------------------------------------------------------------------

-------------------------------------------------------------------------------

!1.063.11 !Discrete ! ! ! ! ! !DIS ! ! !

!2.063.00 !data word ! ! ! ! ! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 11! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 12! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 13! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 14! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 15! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 16! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 17! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 18! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 19! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 20! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 21! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 22! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 23! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 24! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 25! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 26! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 27! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 28! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 29! ! ! ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

!1.111.11 !PACK WATER!W +/- 256 !DegC! ! ! ! ! ! !

!2.111.00 !EXTR. TEM-!-10 to +100 !DegC! ! ! ! ! ! !

! !PERATURE !R 0.25 !DegC! ! ! ! ! ! !

! ! !+/- 2.7 !DegC! 29 ! 10 ! 4 !BNR !TW ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

!1.112.11 !PACK BY- !W 256 ! % ! ! ! ! ! ! !

!2.112.00 !PASS VALVE!0 to 100 ! % ! ! ! ! ! ! !

! !POSITION !R 0.25 ! % ! ! ! ! ! ! !

! ! !+/- 2.2 ! % ! ! 10 ! 6 !BNR !PBV ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

!1.121.11 !PACK OUT- !W +/- 256 !DegC! ! ! ! ! ! !

!2.121.00 !LET TEMPE-!-60 to +100 !DegC! ! ! ! ! ! !

! !RATURE !R 0.25 !DegC! ! ! ! ! ! !

! ! !+/- 6.5 !DegC! 29 ! 10 ! 4 !BNR !TP ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

!1.123.11 !PACK COMPR!W 1024 !DegC! ! ! ! ! ! !

!2.123.00 !OUTLET !0 to 300 !DegC! ! ! ! ! ! !

! !TEMPE- !R 0.25 !DegC! ! ! ! ! ! !

! !RATURE !+/- 6.5 !DegC! ! 12 ! 4 !BNR !COT ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

!1.126.11 !PACK FLOW !W 32 !kg/ ! ! ! ! ! ! !

!2.126.00 !DEMAND !0 to 1.99 !sec ! ! ! ! ! ! !

! ! !R 0.00195 !kg/ ! ! ! ! ! ! !

! ! !+/- 0.105 !sec ! ! 14 ! 6 !BNR !PF ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

!1.127.11 !PACK FLOW !W 32 !kg/ ! ! ! ! ! ! !

!2.127.00 !MEASURED !0 to 1.99 !sec ! ! ! ! ! ! !

! ! !R 0.00195 !kg/ ! ! ! ! ! ! !

! ! !+/- 0.105 !sec ! ! 14 ! 6 !BNR !PF ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

!1.130.11 !PACK RAM !W 256 ! % ! ! ! ! ! ! !

!2.130.00 !AIR INLET !0 to 100 ! % ! ! ! ! ! ! !

! !POSITION !R 0.25 ! % ! ! ! ! ! ! !

! ! !+/- 3.0 ! % ! ! 10 ! 6 !BNR !RI ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

Pack Temperature Control Parameter List EQPT: 8E

-------------------------------------------------------------------------------

| PARAMETER LIST PARAMETER CHARACTERISTICS (NUMERIC) |

-------------------------------------------------------------------------------

-------------------------------------------------------------------------------

!1.063.11 !Discrete ! ! ! ! ! !DIS ! ! !

!2.063.00 !data word ! ! ! ! ! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !FCV HALL ! ! ! ! ! ! ! ! !

! !SENSOR FC !bit status 1! ! !A 11! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !FCV HALL ! ! ! ! ! ! ! ! !

! !SENSOR NFC!bit status 1! ! !A 12! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !FCV OPEN ! ! ! ! ! ! ! ! !

! !COMMAND ! ! ! ! ! ! ! ! !

! !FEEDBACK ! ! ! ! ! ! ! ! !

! !FROM SOLEN!bit status 1! ! !A 13! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 14! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 15! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 16! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 17! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 18! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 19! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 20! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 21! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 22! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 23! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 24! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 25! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 26! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 27! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 28! ! ! ! !

! !----------!------------!----!----!----!----!----!-----!-------!

! !SPARE ! ! ! !A 29! ! ! ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

!1.111.11 !PACK WATER!W +/- 256 !DegC! ! ! ! ! ! !

!2.111.00 !EXTR. TEM-!-60 to +125 !DegC! ! ! ! ! ! !

! !PERATURE !R 0.25 !DegC! ! ! ! ! ! !

! ! !+/- 2.7 !DegC! 29 ! 10 ! 4 !BNR !TW ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

!1.112.11 !PACK BY- !W 256 ! % ! ! ! ! ! ! !

!2.112.00 !PASS VALVE!0 to 100 ! % ! ! ! ! ! ! !

! !POSITION !R 0.25 ! % ! ! ! ! ! ! !

! ! !+/- 2.2 ! % ! ! 10 ! 6 !BNR !PBV ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

!1.121.11 !PACK OUT- !W +/- 256 !DegC! ! ! ! ! ! !

!2.121.00 !LET TEMPE-!-60 to +125 !DegC! ! ! ! ! ! !

! !RATURE !R 0.25 !DegC! ! ! ! ! ! !

! ! !+/- 6.5 !DegC! 29 ! 10 ! 4 !BNR !TP ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

!1.123.11 !PACK COMPR!W 1024 !DegC! ! ! ! ! ! !

!2.123.00 !OUTLET !-60 to +360 !DegC! ! ! ! ! ! !

! !TEMPE- !R 0.25 !DegC! ! ! ! ! ! !

! !RATURE !+/- 6.5 !DegC! ! 12 ! 4 !BNR !COT ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

!1.126.11 !PACK FLOW !W 32 !kg/ ! ! ! ! ! ! !

!2.126.00 !DEMAND !0 to 1.99 !sec ! ! ! ! ! ! !

! ! !R 0.00195 !kg/ ! ! ! ! ! ! !

! ! !+/- 0.105 !sec ! ! 14 ! 6 !BNR !PF ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

!1.127.11 !PACK FLOW !W 32 !kg/ ! ! ! ! ! ! !

!2.127.00 !MEASURED !0 to 1.99 !sec ! ! ! ! ! ! !

! ! !R 0.00195 !kg/ ! ! ! ! ! ! !

! ! !+/- 0.105 !sec ! ! 14 ! 6 !BNR !PF ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

!1.130.11 !PACK RAM !W 256 ! % ! ! ! ! ! ! !

!2.130.00 !AIR INLET !0 to 100 ! % ! ! ! ! ! ! !

! !POSITION !R 0.25 ! % ! ! ! ! ! ! !

! ! !+/- 3.0 ! % ! ! 10 ! 6 !BNR !RI ! !

!--------------!----------!------------!----!----!----!----!----!-----!-------!

Pack Temperature Control Parameter List Remarks:

R = Resolution

W = Wordrange

(I)= Significant Data Digits

Alpha Call-up List

! ALPHA ! PARAMETER ! NAME !

! CALL UP ! NUMBER ! !

!----------------------------------------------------------------------------!

! PSW1 ! 8E.1.062.11! Discrete Data Word !

! ! 8E.2.062.00! !

! ! ! !

! TW ! 8E.1.111.11! Pack Water Extr. Temperature Deg C !

! ! 8E.2.111.00! !

! ! ! !

! PBV ! 8E.1.112.11! Pack Bypass Valve Position % !

! ! 8E.2.112.00! !

! ! ! !

! TP ! 8E.1.121.11! Pack Outlet Temperature Deg C !

! ! 8E.2.121.00! !

! ! ! !

! COT ! 8E.1.123.11! Pack Compr. Outlet Temp. Deg C !

! ! 8E.2.123.00! !

! ! ! !

! PF ! 8E.1.126.11! Pack Flow Demand kg/sec!

! ! 8E.2.126.00! !

! ! ! !

! ! 8E.1.127.11! Pack Flow Measured kg/sec!

! ! 8E.2.127.00! !

! ! ! !

! RI ! 8E.1.130.11! Pack Ram Air Inlet Position % !

! ! 8E.2.130.00! !

!----------------------------------------------------------------------------!

** ON A/C NOT FOR ALL

6. Component Description

A. Controller FIN: 7-HH FIN: 27-HH

Pack Controllers - Location ** ON A/C NOT FOR ALL

(1) General
The pack controller 7HH (27HH) is an electronic assembly of modular construction, mounted on a chassis with a metal cover (4MCU to ARINC 600). There are two identical pack controllers, one for each air conditioning pack 10HM (11HM). Each controller consists of a primary computer and an electrically independent secondary computer. The secondary computer serves as a back-up in the event of a primary computer failure. The primary computer can still control in the event of a partial failure, but at a reduced level.

(2) General
The Air Conditioning System Controller (ACSC) 47HH (57HH) is an electronic assembly of modular construction, mounted on a chassis with a metal cover (4MCU to ARINC 600). There are two identical ACSC's, one for each air conditioning pack 10HM (11HM). Each ACSC has two fully independent lanes.

(3) Functions
The functions of the pack controllers 7HH (27HH) are as follows:

the control of the water-extractor outlet temperature in accordance with demands elaborated from the zone controller 8HK. This control is done through the modulation of the bypass valve 10HH (30HH) and the ram-air doors. The way this is done is combined and optimized to meet the demanded temperature with lowest use of ram-air (reduced drag penalties),
the setting of the optimized flow demand reference computed and sent from the zone controller 8HK. This setting is realized through varying the section of an internal discharge nozzle of the flow control valve 8HB (11HB),
the overheat detection and automatic safety control,
the calibration, coding and delivery of information for ECAM display,
the reduction of crew work load through the elimination of manual control. The system detects its own failures and takes the necessary action to overcome these detected failures automatically,
the simplification of ground maintenance through a ground BITE test based on the CFDS,
the storage of failure data in a non-volatile random access memory.

The pack controller 7HH (27HH) functions are split between the primary computer and the secondary computer as shown below:

-------------------------------------------------------------------------------

FUNCTION PRIMARY SECONDARY

-------------------------------------------------------------------------------

Flow setting modulation Yes No

Pack temp. control from zone controller

demand Yes Yes

Bypass valve control Yes Yes

Ram air flow modulation Yes No

Overheat detection and indication Yes Yes

Pack temp. control to 15 DEG.C (59 DEG.F) ref. No Yes

Failure analysis Yes Yes

BITE and info. transmission to zone

controller Yes No

ECAM indications No Yes

Anti-ice valve control Yes Yes

Data handling Yes Yes

(4) Functions
The functions of the ACSC 47HH (57HH) are as follows:

the control of the water-extractor outlet temperature. This control is done through the modulation of the bypass valve 10HH (30HH) and the ram-air doors. The way this is done is combined and optimized to meet the demanded temperature with lowest use of ram-air (reduced drag penalties),
to set the optimized flow demand reference. This setting is realized through varying the section of an internal discharge nozzle of the flow control valve 23HB (24HB),
to compute and deliver a pack temperature demand signal for the pack
to maintain constant temperatures at a preselected value in the cockpit, FWD cabin and AFT cabin zones
overheat detection and automatic safety control,
to compute and deliver an engine rpm modulation to FADEC in order to get the necessary bleed pressure
to give the FADEC a bleed air valve status
the calibration, coding and delivery of information for ECAM display,
the reduction of crew work load through the elimination of manual control. The system detects its own failures and takes the necessary action to overcome these detected failures automatically,
the simplification of ground maintenance through a ground BITE test based on the CFDS,
the storage of failure data in a non-volatile random access memory.

(5) Compressor Outlet Overheat-Detection and Signals
The pack controller 7HH (27HH) primary or secondary computer can detect an overheat 260 DEG.C (500.00 DEG.F) at the air-cycle machine 10HM (11HM) compressor outlet. The primary through the compressor discharge temp. sensor 12HH (32HH), and the secondary through the compressor overheat sensor 15HH (35HH). The first will send a signal to light up the FAULT legend on the related pack pushbutton switch 7HB (6HB) (installed on panel 30VU in the cockpit overhead panel). At this point, the crew must select the pack OFF manually, as the pack controller takes no automatic actions. An overheat signal is also sent on the fourth occurrence (during one flight leg), of a temperature over 230 DEG.C (446.00 DEG.F).

(6) Compressor Outlet Overheat-Detection and Signals
The ACSC 47HH (57HH) can detect an overheat 260 DEG.C (500.00 DEG.F) at the air-cycle machine 10HM (11HM) compressor outlet. THe ACSC active lane will send a signal to light up the FAULT legend on the related pack pushbutton switch 7HB (6HB) (installed on panel 30VU in the cockpit overhead panel). At this point, the crew must select the pack OFF manually, as the ACSC takes no automatic action.

B. Ram Air Inlet Actuator

Ram-Air Door Actuator ** ON A/C NOT FOR ALL

The actuator for the ram air inlet consists of:

an actuator (nominal 100 mm stroke),
an AC motor,
a set of reduction gears,
a torque limiting clutch,
two potentiometers, one for control through the pack controller 7HH (27HH) primary computer, the other for indication through the secondary computer,
two limit switches, one for the closed position, the other for the 70 % open position. These send a signal to the secondary computer.

The ram-air inlet is closed with the actuator fully extended and open with the actuator fully retracted.

Ram-Air Door Actuator ** ON A/C NOT FOR ALL

The actuator for the ram air inlet consists of:

an actuator (nominal 100 mm stroke),
an AC motor,
a set of reduction gears,
a torque limiting clutch,
a hall sensor for non-contact sensing of speed and direction, giving feedback to ACSC
two end-of-travel limit switches, one for the closed position, the other for the 70 % open position.

The ram-air inlet is closed with the actuator fully extended and open with the actuator fully retracted.

C. Bypass Valve

Bypass Valve 10HH, 30HH - Schematic ** ON A/C NOT FOR ALL

The bypass valve 10HH (30HH) is a light alloy 2-inch butterfly valve. It is located in the duct downstream of the primary heat exchanger and splits the hot airflow between the ACM and a bypass (which goes to the turbine outlet). The bypass valve gets a signal from the pack controller 7HH (27HH) (primary and secondary computer) to modulate the hot airflow. This controls the water extractor outlet temperature, thus the pack outlet temperature. The bypass valve 10HH (30HH) consists of an actuator assembly and a valve body assembly. They are bolted together and internally connected.
A butterfly valve on a central shaft is driven by a stepper motor through reduction gears which have mechanical end stops. Two cams (installed on the shaft) operate limit switches which signal fully open or fully closed positions to the pack controller 7HH (27HH) secondary computer. Step counting signals the primary and secondary computers for indication. The limit switches signal the secondary computer for BITE. A manual override and visual position indicator device is installed on the bottom of the shaft.

Bypass Valve 10HH, 30HH - Schematic ** ON A/C NOT FOR ALL

The bypass valve 10HH (30HH) is a light alloy 2-inch butterfly valve. It is located in the duct downstream of the primary heat exchanger and splits the hot airflow between the ACM and a bypass (which goes to the turbine outlet). The bypass valve gets a signal from the pack controller 7HH (27HH) (primary and secondary computer) to modulate the hot airflow. This controls the water extractor outlet temperature, thus the pack outlet temperature. The bypass valve 10HH (30HH) consists of an actuator assembly and a valve body assembly. They are bolted together and internally connected.
A butterfly valve on a central shaft is driven by a stepper motor through reduction gears which have mechanical end stops. A cam (installed on the shaft) operates a limit switches which signals the fully closed position to the pack controller 7HH (27HH) secondary computer. Step counting signals the primary and secondary computers for indication. The limit switch signals the secondary computer for BITE. A manual override and visual position indicator device is installed on the bottom of the shaft.

Bypass Valve 10HH, 30HH - Schematic ** ON A/C NOT FOR ALL

The bypass valve 10HH (30HH) is a light alloy 2.5-inch butterfly valve. It is located in the duct downstream of the primary heat exchanger and splits the hot airflow between the ACM and a bypass (which goes to the turbine outlet). The bypass valve gets a signal from the ACSC 47HH (57HH) (lane 1 and lane 2) to modulate the hot airflow. This controls the water extractor outlet temperature, thus the pack outlet temperature. The bypass valve 10HH (30HH) consists of an actuator assembly and a valve body assembly. They are bolted together and internally connected.
A butterfly valve on a central shaft is driven by a stepper motor through reduction gears which have mechanical end stops. A cam (installed on the shaft) operates a limit switch which signals the fully closed position to the ACSC 47HH (57HH) active lane. Step counting signals lane 1 and lane 2 for indication. The limit switch signals the active lane for BITE. A manual override and visual position indicator device is installed on the bottom of the shaft.

D. Anti-ice Valve

Anti-Ice Valve 17HH, 37HH - Schematic ** ON A/C NOT FOR ALL

In each air conditioning pack 10HM (11HM), the anti-ice valve 17HH (37HH) is located in a duct between the upstream side of the primary heat exchanger and the turbine outlet. In normal pack operation the purpose of the anti-ice valve is to prevent ice blockage across the condenser. If the pack controller 7HH (27HH) is unable to control the bypass valve 10HH (30HH) the anti-ice valve is signalled to pneumatically control the pack outlet temperature to 15 DEG.C (59.00 DEG.F).
Muscle pressure to activate the valve is drawn through a filter (8) through a tapping at the upstream end of the valve. Without muscle pressure the valve remains closed because of the action of a spring (7). In normal pack operation, the solenoid (10) is energized opening the vent valve. When muscle pressure is applied it is immediately vented and the valve remains closed. The valve stops the build-up of ice across the condenser using a differential pressure regulator (1). This differential pressure regulator opens the valve and deliver hot air to the condenser. Port (4) senses condenser inlet high-pressure and port (2) senses condenser outlet high-pressure. When ice builds up along the flow path through the condenser the pressure drop increases rapidly. The differential pressure between the ports (4) and (2) increases. This opens the poppet valve (6) which allows a high flow of muscle pressure into the Pneumatic actuator, which opens the anti-ice valve. The vent restrictor (12) is not large enough to drop the muscle pressure very much. The action of the valve is identical for icing of the low-pressure side of the condenser, where the pressures are sensed at ports (5) and (3). If the pack controller 7HH (27HH) is unable to control the bypass valve 10HH (30HH) the solenoid (10) is de-energizd which closes the vent (12). The muscle pressure supply is then governed through the pressure regulator (9). The vent flow is controlled with the pack pneumatic temperature sensor (11). The pressure in the pneumatic actuator (valve angle) is controlled with the pneumatic sensor.

E. Solenoid Valve

Solenoid Valve 25HH, 40HH - Schematic ** ON A/C NOT FOR ALL

The solenoid valve is installed in the control line between the air cycle machine outlet and the differential pressure regulator of the anti-ice valve.
The 3/2 way solenoid valve has an alloy valve block and a solenoid attached. The electrical connector is attached to the body.
In normal operation the solenoid valve is always energized.
When the solenoid is energized, the iron core with the plunger moves against the spring load into the coil and makes the ball free. This opens the passage from port A to port B and the air pressure goes to the differential pressure regulator of the anti-ice valve.
When the solenoid is de-energized, the spring moves the iron core with the plunger and the ball against the lower valve seat. This closes the passage from port A to port B and opens the passage between port B and port C to ambient. Thus, the air pressure decreases in the control line to the differential pressure regulator of the anti-ice valve.

F. Compressor Discharge Temperature-Sensor

Pack Discharge Temp. Sensor, Compressor Discharge Temp. Sensor, Compressor Overheat Sensor. ** ON A/C NOT FOR ALL

The compressor discharge temperature-sensor 12HH (32HH) consists of one platinum resistor potted in a stainless-steel ventilated-tube housing. A 3-pin electrical connector is also included. The sensor is located in the compressor outlet duct of each air conditioning pack 10HM (11HM). It is connected to the pack controller 7HH (27HH) primary-computer for control functions and overheat detection.

Pack Discharge Temp. Sensor, Compressor Discharge Temp. Sensor ** ON A/C NOT FOR ALL

The compressor discharge temperature-sensor (CDS) 12HH (32HH) is located in the compressor outlet duct of each air conditioning pack 10HM (11HM). The CDS is a duplex PT100 temperature sensor and measures the compressor outlet air temperature.
Both sensor elements of each CDS are linked to the corresponding ACSC lane 1 and 2. The ACSC will use the measured temperature to control the compressor outlet temperature and to generate a warning in case of overheat in flight. On ground the corresponding pack is switched off by the ACSC additionally.

G. Compressor Overheat Sensor

Pack Discharge Temp. Sensor, Compressor Discharge Temp. Sensor, Compressor Overheat Sensor. ** ON A/C NOT FOR ALL

The compressor overheat sensor 15HH (35HH) is located in the compressor outlet duct (close to the compressor discharge temperature sensor 12HH (32HH)). The sensor is connected to the pack controller 7HH (27HH) secondary-computer for overheat detection. The sensor also provides compressor outlet temperature on ECAM. This will ease troubleshooting.

H. Water Extractor Temperature-Sensor

Water Extractor Temperature-Sensor 11HH, 31HH ** ON A/C NOT FOR ALL

The water extractor temperature-sensor 11HH (31HH) consists of two thermistors potted in a hermetically sealed steel housing. A 6-pin electrical connector is also included. One thermistor is connected to the pack controller 7HH (27HH) primary-computer the other to the secondary computer. They both give control information.

Water Extractor Temperature-Sensor 11HH, 31HH ** ON A/C NOT FOR ALL

The water extractor temperature-sensor 11HH (31HH) consists of two thermistors potted in a hermetically sealed steel housing. A 6-pin electrical connector is also included. One sensing element is connected to lane 1 and the other to lane 2 of the corresponding ACSC.

I. Compressor Pneumatic Overheat-Sensor

Compressor Pneumatic Overheat-Sensor 10HM9, 11HM9, Pack Outlet Pneumatic-Sensor 10HM10, 11HM10 ** ON A/C NOT FOR ALL

The compressor pneumatic overheat-sensor 10HM9 (11HM9) consists of a bi-metalic rod which is inserted into the hot airflow. The sensor is connected through a sensing line, to the flow control valve 8HB (11HB) shuttle valve assembly. It vents flow control muscle pressure to ambient (Ref. AMM D/O 21-51-00-00). Differential expansion in the rod will start to open the vent at 230 DEG.C (446.00 DEG.F) (any further increase in temperature will increase the opening area). The angle of the flow control valve is now controlled pneumatically, to stop an overheat of 260 DEG.C (500.00 DEG.F). The pneumatic sensor is located in the compressor discharge duct close to the compressor overheat sensor 15HH (35HH).

J. Pack Sensor

Compressor Pneumatic Overheat-Sensor 10HM9, 11HM9, Pack Outlet Pneumatic-Sensor 10HM10, 11HM10 ** ON A/C NOT FOR ALL

The pack outlet pneumatic-sensor 10HM10 (11HM10) is located at the pack outlet. When the anti-ice valve 17HH (37HH) is operative the sensor adjusts the muscle pressure in the valve to maintain the pack outlet temperature at about 15 DEG.C (59.00 DEG.F).

Pack Discharge Pressure Sensor (PDPS) 14HH (20HH) ** ON A/C NOT FOR ALL

The pack discharge pressure sensor 14HH (20HH) measures the pressure difference between turbine outlet and cabin (underfloor) pressure. The PDPS is mounted on each side of the air conditioning bay center beam and is connected to the correspondent ACSC. In case the ACSC detects a certain pressure difference, the ACSC will open the bypass valve for the de-icing of the turbine outlet, condenser and downstream ducting.

K. Pack Inlet Pressure-Sensor

Pack Inlet Pressure-Sensor 16HH, 36HH ** ON A/C NOT FOR ALL

The pack inlet pressure sensor 16HH (36HH) converts pressure at the pack inlet into an electrical signal, it consists of:
- a high-precision pressure transducer,
- a measurement amplifier,
- an electrical connector.
The pressure sensor is installed upstream of the flow control valves 8HB (11HB). If the pressure drops below limits, the bypass valve 10HH (30HH) preferential position is controlled to a more open position to allow for supply of a minimum required airflow. This decreases the differential pressure of the air conditioning pack 10HM (11HM). The ram-air flaps are controlled to a more open position, this compensates for the decreased efficiency of the turbine/compressor cycle.

L. Pack Discharge Temperature-Sensor

Pack Discharge Temp. Sensor, Compressor Discharge Temp. Sensor, Compressor Overheat Sensor. ** ON A/C NOT FOR ALL

The pack discharge temperature-sensor 13HH (34HH) is located at the pack outlet (close the pack outlet pneumatic sensor). The sensor is connected to the pack 7HH (27HH) secondary computer and monitors the pack outlet temperature which is shown on the ECAM lower display unit.

Pack Discharge Temp. Sensor, Compressor Discharge Temp. Sensor ** ON A/C NOT FOR ALL

The pack discharge temperature-sensor 13HH (34HH) is located at the pack outlet. The sensor is connected to the ACSC 47HH (57HH) and monitors the pack outlet temperature which is shown on the ECAM lower display unit.

** ON A/C NOT FOR ALL

7. Operation/Control and Indicating

Pack Controller - Primary Computer - Normal Control Function ** ON A/C NOT FOR ALL

Pack Controller - Secondary Computer - Back-up Control Function ** ON A/C NOT FOR ALL

AIR COND Panel ** ON A/C NOT FOR ALL

Pack Controller - Single Failures and Consequences ** ON A/C NOT FOR ALL

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, and bypass valve 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 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:
The ACSC computes from the selected temperature, the altitude correction and eventually a FAP offset, a target temperature.
The ACSC compares the target temperature with the measured water extractor outlet temperature and determines the bypass valve drive speed and direction. 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 water-extractor outlet temperatures are limited to prevent blockage by icingand too high stress. 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

----------------------------------------------------------------------------

! 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) ! !

!--------------------------------------!-------------------------------------!

! 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 !

----------------------------------------------------------------------------

(3) One or two packs operation

----------------------------------------------------------------------------

! 0 to 20000 ft ! 5 DEG.C (41 DEG.F) !

!--------------------------------------!-------------------------------------!

! 20000 to 28000 ft ! slope between 5 DEG.C (41 DEG.F) !

! ! and 0 DEG.C (32 DEG.F) !

!--------------------------------------!-------------------------------------!

! 28000 ft to 30000 ft ! slope between 0 DEG.C (32 DEG.F) !

! ! and -30 DEG.C (-22 DEG.F) !

--------------------------------------!-------------------------------------

! above 30000 ft ! -30 DEG.C (-22 DEG.F) !

--------------------------------------!-------------------------------------

(4) Compressor outlet temperature limits

----------------------------------------------------------------------------

! up to 180 DEG.C (385 DEG.F) ! normal operation !

!--------------------------------------!-------------------------------------!

! 180 DEG.C (385 DEG.F) to ! tempearture range in case of ram !

! 215 DEG.C (419 DEG.F) ! air inlet is fully open and the !

! ! limit of 180 DEG.C (385 DEG.F) !

! ! cannot be met !

!--------------------------------------!-------------------------------------!

! 215 DEG.C (419 DEG.F) ! bleed flow reduction by the flow !

! to 260 DEG.C (500 DEG.F) ! control loop !

!--------------------------------------!-------------------------------------!

! > 260 DEG.C (500 DEG.F) ! overheat warnings to the ECAM !

! more than 1.2 sec ! and the pack switches on overhead !

! (overheat limit) ! panel 30VU !

----------------------------------------------------------------------------

B. Operation in Failure Cases
The system includes various back-up functions to make sure of safe operation during failure cases, these are as follows:
The system includes various back-up functions to make sure of safe operation during failure cases.

(1) If the pack controller 7HH (27HH) primary computer fails the secondary computer controls at a reduced level. The ram-air inlet flaps will open to the maximum flight position and no further optimization takes place, (the flow control reference remains at its previous setting). Control of the water-extractor outlet temperature (to the level demanded from the zone controller 8HK) will still take place through modulation of the bypass valve 10HH (30HH). The overheat warning will still be available.

(2) If the zone controller 8HK (or its communications) fail completely the pack controllers 7HH (27HH) take over control. They will limit the water extractor outlet temperature to 20 DEG.C (68.00 DEG.F) for pack 1 (10HM) and to 10 DEG.C (50.00 DEG.F) for pack 2 (11HM). If there is a failure (of the communications from the zone controller main computer and it remains active), the pack controllers take over control. They will limit the water extractor outlet temperature to 5 DEG.C (41.00 DEG.F) for pack 1 and to 10 DEG.C (50.00 DEG.F) for pack 2. The zone controller can still use the trim-air system (Ref. 21-63-00) to increase the cabin inlet temperature, if necessary. The pack controllers still get the zone controller status signal from the zone secondary computer.
A flow priority mode is included in the pack controller primary computer. At low pack inlet pressure the bypass valve 10HH (30HH) (and the ram-air inlet flaps) are modulated to a more open position and thus increase pack permeability.

(3) The pack controller will detect a failure of the bypass valve function when:

the bypass valve fails (either because of a valve actuator failure or because of a valve jam),
the power output circuit of the primary channel fails.

In both cases the secondary channel of the pack controller takes the control and opens the ram air inlet flaps to a limited position.
If the power output circuit was the faulty function, the temperature will be controlled by the secondary channel and the bypass valve.
If the bypass valve failure is effective, the ram air inlet flaps are controlled to a limited open position by the secondary channel to avoid overheating of the compressor.
A failure of the primary channel of the pack controller is indicated on the CFDS by the message P1 CONT or P2 CONT.

(4) If one lane of the ACSC 47HH (57HH) fails, the other takes over full control.

(5) In case that temperature limits are exceeded, an automatically reaction by the ACSC will be the consequence. If the compressor discharge temp sensor exceeds a certain limit the flow control valve control loop will reduce the pack bleed air flow. If an overheat is detected at the compressor discharge temp sensor or pack discharge temperature sensor an overheat message will be generated and the cockpit crew has the decision to shut off the corresponding pack (on ground the pack is shut off automatically).

(6) In case of some special system operation conditions the flow setting will be automatically changed by the flow control loop:

change to the 'ONE PACK OFF'-flow setting in case of one pack off
'ONE PACK OFF'-flow demand in case of APU supply (both FCV's fully open)
change to the"ONE PACK OFF"-flow setting in case of pack inlet pressure sensor failed
during Take Off/Landing change to the NORM flow setting

The flow control has to fulfill some flow limits to prevent

recirc fan surge
bleed system precooler overheat
bleed system OFF by the bleed reverse flow protection
cabin depressurization

C. Pneumatic Control and Overheat Protection
Included in the air conditioning packs 10HM (11HM) are pneumatic control devices. They are a final back-up for overheat protection, pack control and icing protection and are as follows:

(1) Compressor Overheat
Installed at the compressor outlet is a pneumatic temperature sensor. This acts (by differential expansion) directly on the flow control valve 8HB (11HB) muscle pressure. It starts to close the flow control valve when the compressor outlet temperature gets to 230 DEG.C (446.00 DEG.F). Control is such that the overheat warning temperature of 260 DEG.C (500.00 DEG.F) should never occur.

(2) Icing Protection
Icing of the pack condenser is prevented with the anti-ice valve 17HH (37HH). There are two pairs of pressure sense lines. One on the high pressure side of the condenser inlet/outlet, the other on the low pressure side of the condenser inlet/outlet. If an excessive pressure drop (indicating icing) is detected, the anti-ice valve is opened (pneumatically). This results in a surge of hot air to the turbine outlet, which clears the ice blockage, the anti-ice valve then shuts.

(3) Pneumatic Temperature Control
In the event that the pack controller 7HH (27HH) cannot control the pack outlet temperature, the pneumatic temperature control system is activated. The anti-ice valve 17HH (37HH) works with the pack outlet pneumatic sensor, to control the pack outlet temperature pneumatically to a nominally constant value of 15 DEG.C (59.00 DEG.F).

** ON A/C NOT FOR ALL

8. BITE Test

A. Built-In Test Equipment (BITE)
The pack controllers 7HH (27HH) control the Built-In Test Equipment (BITE) function for the:

pack control and indicating system (Ref. AMM D/O 21-51-00-00),
air cooling system (Ref. AMM D/O 21-52-00-00),
pack cooling air control system (Ref. AMM D/O 21-53-00-00),
pack temperature control system (Ref. AMM D/O 21-61-00-00).

They monitor the hardware and system performance. They send failure data to the zone temperature controller 8HK (Ref. AMM D/O 21-63-00-00).
There are the following tests:

power-up test,
continuous monitoring,
system test.

The Air Conditioning System Controller (ACSC) 47HH (57HH) control the Built-In Test Equipment (BITE) function for the:

pack control and indicating system (Ref. AMM D/O 21-51-00-00),
air cooling system (Ref. AMM D/O 21-52-00-00),
pack cooling air control system (Ref. AMM D/O 21-53-00-00),
pack temperature control system (Ref. AMM D/O 21-61-00-00).
cockpit and cabin temperature control system (Ref. AMM D/O 21-63-00-00).

They monitor the hardware and system performance. They send failure data to the Central Fault Display System (CFDS) controller.
There are the following tests:

power-up test,
continuous monitoring,
system test.

(1) Pack Controller Power-up Test

(a) Conditions of Power-up Test Initialization

1 How long the computer must be de-energized:

2 ms

2 A/C configuration:

A/C on ground
AIR COND panel:
both packs selected OFF
ECAM BLEED page:
flow control valves closed

(b) Progress of Power-up Test

1 Duration:

30 s

2 Cockpit repercussions directly linked to power-up test accomplishment (some other repercussions may occur depending on the A/C configuration but these can be ignored):

ECAM BLEED page:
by-pass valve is moving from cool to hot and from hot to cool

1 Test passed:

ECAM BLEED page:
normal display

2 Test failed:

MASTER CAUT ON with gong
ECAM warning:
AIR PACK 1(2) REGUL FAULT
ECAM BLEED page:
amber XX in place of pack indications (upper part of the page)

(2) Continuous Monitoring
The continuous monitoring is done continuously if power is supplied to the system.

(3) System Test
A system test is only done if it is requested on the Multipurpose Central Display Unit (MCDU) after a component is replaced.

B. MCDU
The pack controllers 7HH (27HH) send failure data to the zone temperature controller 8HK. The zone temperature controller sends failure data to the Centralized Fault Display System (CFDS) (Ref. AMM D/O 31-32-00-00). For MCDU data, refer to chapter 21-63-00.

(1) ACSC Power-up Test

(a) Conditions of Power-up Test Initialization

1 How long the computer must be de-energized:

2 ms

2 A/C configuration:

A/C on ground
AIR COND panel:
both packs selected OFF
ECAM BLEED page:
flow control valves closed

(b) Progress of Power-up Test

1 Duration:

30 s

2 Cockpit repercussions directly linked to power-up test accomplishment (some other repercussions may occur depending on the A/C configuration but these can be ignored):

on the BLEED page of the lower ECAM display unit, the bypass valve symboles move from COOL to HOT and from HOT to COOL (some other repercussions may occur depending on the A/C configuration but these can be ignored).

1 Test passed:

ECAM BLEED page:
normal display

2 Test failed:

MASTER CAUT ON with gong
ECAM warning:
AIR PACK 1(2) REGUL FAULT
ECAM BLEED page:
amber XX in place of pack indications (upper part of the page)

(2) Continuous Monitoring
The monitoring is done continuously after power is supplied to the system. In the event of a failure detection, the system activates the related back-up and discriminates the faulty line replaceable unit.

(3) System Test
A system test is only done if it is requested on the Multipurpose Central Display Unit (MCDU) after a component is replaced.

C. MCDU

MCDU Page - LAST LEG REPORT, PREVIOUS LEGS REPORT, LRU IDENTIFICATION, TROUBLE SHOOT DATA - EXAMPLE - text ** ON A/C NOT FOR ALL

MCDU Page - SYSTEM TEST ** ON A/C NOT FOR ALL

MCDU Page - CLASS 3 FAULTS, GROUND REPORT, SYSTEM DATA ** ON A/C NOT FOR ALL

The ACSC 2 57HH sends failure data to the Centralized Fault Display System (CFDS) (Ref. AMM D/O 31-32-00-00).
You can set the MCDU to show the failures that occurred during the last flight. The data comes from the CFDS (Ref. AMM D/O 31-32-00-00). You can also start the system test from the MCDU.
From the CAB TEMP CONT menu, you can set:

<LAST LEG REPORT
<PREVIOUS LEGS REPORT
<LRU IDENTIFICATION
<TROUBLE SHOOT DATA
<GROUND REPORT
<TEST
<CLASS 3 FAULTS
<SYSTEM DATA.

(1) <LAST LEG REPORT
If you push the <LAST LEG REPORT line key, the screen shows for each failure that occurred during the last leg:

The date of the last leg
The time the failure occurred
The ATA number of the component
The functional designation of the component
The FIN of the component.

For each fault you can select the cursor '>' to find the applicable TROUBLE SHOOT DATA.
The screen can show a maximum of two failures at a time. If there are more failures, you must push the next page key on the MCDU keyboard. If there are no failures, NO FAULT DETECTED is shown.

(2) <PREVIOUS LEGS REPORT
If you push the <PREVIOUS LEGS REPORT line key, the screen shows for each failure that has not been corrected from previous reports:

The applicable flight leg
The date of the applicable flight leg
The time the failure occurred
The flight phase where the failure occurred
The ATA number of the component
The functional designation of the component
The FIN of the component.

(3) <LRU IDENTIFICATION
If you push the <LRU IDENTIFICATION line key, the screen shows the partnumber and the serial number of the components.

(4)

(5) <TROUBLE SHOOT DATA
If you push the <TROUBLE SHOOT DATA line key, the screen shows the TROUBLE SHOOTING DATA of the last flight only.

(6)

(7) <GROUND REPORT
If you push the <GROUND REPORT line key, the screen shows the faults which occurred during current aircraft on ground time:

The time the failure occurred
The ATA number of the component
The functional designation of the component
The FIN of the component
The CLASS of the failure.

(8) <TEST
If you push the <TEST line key, the <CAB TEMP CONT SYSTEM TEST page is shown.
The screen shows: SELECT PACK 1 + 2 OFF.
After you selected <START TEST and confirmed, the screen shows:

(IN PROGRESS MAX 240S)
TEST OK if there are no failures
The ATA number, the functional designation, the FIN of the component and CLASS of failure, if there are failures.

(9) <CLASS 3 FAULTS
If you push the <CLASS 3 FAULTS line key, the screen shows the LAST LEG CLASS 3 FAULTS:

The time when the failure occurred
The ATA number of the component
The functional designation of the component
The FIN of the component.

(10) <SYSTEM DATA
If you push the <SYSTEM DATA line key, the <CAB TEMP CONT SYSTEM DATA page is shown.
If you push the <PRESS SENSORS line key, the screen shows the SYSTEM DATA of the PRESS SENSORS:

Bleed pressure
Pack inlet pressure
Ambient pressure.

D. CFDS Maintenance Messages

(1) The ACSC 2 57HH sends failure data collected from the ACSC's as well as those detected by its BITE to the Centralized Fault Display System (CFDS).
A possible failure can be class 1, class 2 or class 3.

A class 1 failure requires immediate maintenance action, as they always lead to a loss of the affected system with operational consequences.
A class 2 failure will not lead to operational consequences but cannot be left uncorrected until the next scheduled maintenance check.
Class 3 failure are failures which can be left uncorrected until the next scheduled maintenance check.
The possible maintenance messages (class 1, 2, 3) provided by the ACSC are shown in the following tables.

(2) Class 1 Maintenance Messages

NOTE: Test is available only if both pack flow-control valves are shown closed on the ECAM BLEED page.

-------------------------------------------------------------------------------

| BITE TEST

|-----------------------------------------------------------------------------|

| INDICATION ON THE MCDU | ATA REF. | BITE DETECTION |

-------------------------------------------------------------------------------

FWD CARGO FAN OR SPLY 21-28-53

(6HN)

AFT CARGO FAN OR SPLY 21-28-53

(35HN)

MIXER FLAP DRIVE OR SPLY 21-51-52

(20HB)

TRIM AIR PRESS VALVE(14HK) 21-63-52

OR PRESS SWITCH(26HK)

RECIRC FAN1(15HG) and 2 21-21-51

(14HG) OR SPLY

RECIRC FAN 1 OR SPLY 21-21-51

(15HG)

RECIRC FAN 2 OR SPLY 21-21-51

(14HG)

P1 FLOW CONT VALVE(23HB) 21-51-51 ELECTRICAL MODE FAULT

P2 FLOW CONT VALVE(24HB) 21-51-51 ELECTRICAL MODE FAULT

P1 COMP TEMP SENSOR(12HH) 21-53-11

P2 COMP TEMP SENSOR(32HH) 21-53-11

P1 WATER EX TEMP SENSOR 21-53-17 SENSOR 1 OR 2 OUT OF RANGE

(11HH)

P2 WATER EX TEMP SENSOR 21-53-17 SENSOR 1 OR 2 OUT OF RANGE

(31HH)

P1 OUT TEMP SENSOR(13HH) 21-53-18

P2 OUT TEMP SENSOR(34HH) 21-53-18

P1 COMP OVERHEAT 21-61-00

P2 COMP OVERHEAT 21-61-00

P1 DISCHARGE OVERHEAT 21-61-00

P2 DISCHARGE OVERHEAT 21-61-00

P1 WATER EXT OVERHEAT 21-61-00

P2 WATER EXT OVERHEAT 21-61-00

DUCT OVERHEAT CKPT 21-63-00

DUCT OVERHEAT FWD CAB 21-63-00

DUCT OVERHEAT AFT CAB 21-63-00

P1 PRESS INL SENS(23HB1) 21-61-16 SENSOR OUT OF RANGE

P2 PRESS INL SENS(24HB1) 21-61-16 SENSOR OUT OF RANGE

P1 FLOW SENSOR(23HB2) 21-51-11 SENSOR OUT OF RANGE

OR OFFSET MONITOR FAILURE

P2 FLOW SENSOR(24HB2) 21-51-11 SENSOR OUT OF RANGE

OR OFFSET MONITOR FAILURE

P1 FLOW SENSOR(23HB2) / 21-51-11

PIPS(23HB1)

P2 FLOW SENSOR(24HB2) / 21-51-11

PIPS(24HB1)

P1 FLOW SENSOR(23HB2) / 21-51-11

FLOW CONT VALVE(23HB) /

PIPS(23HB1)

P2 FLOW SENSOR(24HB2) / 21-51-11

FLOW CONT VALVE(24HB) /

PIPS(24HB1)

P1 DISCHARGE PRESS SENSOR 21-61-16

(14HH)

P2 DISCHARGE PRESS SENSOR 21-61-16

(20HH)

ACSC1(47HH) / P1 BY PASS 21-61-00

VALVE(10HH)

ACSC2(57HH) / P2 BY PASS 21-61-00

VALVE(30HH)

ACSC1 LANE1 28VDC 24-00-00

SUPPLY INTERRUPT

ACSC2 LANE1 28VDC 24-00-00

SUPPLY INTERRUPT

ACSC2 LANE2 28VDC 24-00-00

SUPPLY INTERRUPT

ACSC2 LANE1 115VAC 24-00-00

SUPPLY INTERRUPT

ACSC2 LANE2 115VAC 24-00-00

SUPPLY INTERRUPT

ACSC1 (47HH) / POWER 24-00-00

SUPPLY INTERRUPT ACSC1

ACSC2 (57HH) / POWR 24-00-00

SUPPLY INTERRUPT ACSC2