W DOC AIRBUS | AMM A320F

Installation of the Water Injector

TASK 21-52-42-400-001-A
Installation of the Water Injector

WARNING: MAKE SURE THAT AIR IS NOT SUPPLIED TO THE AIR CONDITIONING SYSTEM FROM THE MAIN ENGINE, THE APU OR A GROUND SOURCE. HOT COMPRESSED AIR CAN CAUSE INJURY TO PERSONNEL.
NOTE: The procedure is the same for the water injectors 20HM and 21HM.
FIN: 20HM
FIN: 21HM
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
Torque wrench: range to between 1.75 and 1.65 m.daN (12.91 and 12.17 lbf.ft ) T
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
FOR [20HM] (P1 WATER INJECTOR)
191KB
FOR [21HM] (P2 WATER INJECTOR)
192KB
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 24-41-00-861-002-A
Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01
Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02
Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A
De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01
De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02
De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 53-35-13-000-002-A
Removal of the Quick-Release Access Panels from the Belly Fairing Structure
TASK 53-35-13-400-002-A
Installation of the Quick-Release Access Panels on the Belly Fairing Structure
F Water Injector
3. Job Set-up
Subtask 21-52-42-860-050-A
A. Aircraft Maintenance Configuration
   (1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
   (2) On the panel 30VU make sure that:
     (a) The APU BLEED pushbutton switch is in the off position (the ON legend is off).
     (b) The ENG 1 BLEED and the ENG 2 BLEED pushbutton switches are in the off position (the OFF legends are on).
     (c) The warning notice to tell persons not to operate these pushbutton switches is in position.
   (3) Make sure that on the HP ground connector the warning notice to tell persons not to supply the ground air is in position.
   (4) Make sure that the access panel(s) is/are removed (Ref. AMM TASK 53-35-13-000-002).
     (a) FOR [20HM] (P1 WATER INJECTOR)
  • 191KB,
     (b) FOR [21HM] (P2 WATER INJECTOR)
  • 192KB.
Subtask 21-52-42-865-051-A
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
FOR FIN: 20HM (P1 WATER INJECTOR)
49VUAIR COND/TEMP CTL/SYS 1 CHAN B/28VDC52HHD08
** ON A/C NOT FOR ALL
122VUAIR COND/PACK TEMP/CTL SYS1/1/115VAC1HHX22
122VUAIR COND/PACK TEMP/CTL SYS1/1/28VDC3HHX21
122VUAIR COND/PACK TEMP CTL SYS2/1/28VDC4HHY19
122VUAIR COND/PACK TEMP CTL SYS2/1/115VAC2HHY18
** ON A/C NOT FOR ALL
122VUAIR COND/TEMP CTL SYS 1/CHAN A/115VAC49HHX22
122VUAIR COND/TEMP CTL SYS 1/CHAN A/28VDC51HHX21
122VUAIR COND/TEMP CTL SYS 1/CHAN B/115VAC50HHY18
** ON A/C NOT FOR ALL
FOR FIN: 21HM (P2 WATER INJECTOR)
122VUAIR COND/PACK TEMP/CTL SYS1/2/115VAC21HHW22
122VUAIR COND/PACK TEMP/CTL SYS1/2/28VDC23HHW21
122VUAIR COND/PACK TEMP CTL SYS2/2/28VDC24HHY21
122VUAIR COND/PACK TEMP CTL SYS2/2/115VAC22HHY20
** ON A/C NOT FOR ALL
122VUAIR COND/TEMP CTL SYS 2/CHAN A/115VAC53HHW22
122VUAIR COND/TEMP CTL SYS 2/CHAN A/28VDC55HHW21
122VUAIR COND/TEMP CTL SYS 2/CHAN B/28VDC56HHY21
122VUAIR COND/TEMP CTL SYS 2/CHAN B/115VAC54HHY20
4. Procedure
Subtask 21-52-42-420-050-A
A. Installation of the Water Injector
   (1) Clean the component interfaces and the adjacent area.
   (2) Put the washer (6) and the water injector (2) in position on the inlet plenum (1).
   (3) Make sure that the water injector is in the correct position and install the washers (5) and the bolts (4).
NOTE: The water injector nozzle must point in the direction of the airflow.
   (4) Remove the blanking plugs from the disconnected line ends.
   (5) Connect the water hose (3) to the water injector (2).
   (6) TORQUE the water hose (3) connector to between 1.75 and 1.65 m.daN (12.91 and 12.17 lbf.ft ) T.
   (7) Make sure that the work area is clean and clear of tools and other items.
5. Close-up
Subtask 21-52-42-865-052-A
A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
FOR FIN: 20HM (P1 WATER INJECTOR)
49VUAIR COND/TEMP CTL/SYS 1 CHAN B/28VDC52HHD08
** ON A/C NOT FOR ALL
122VUAIR COND/PACK TEMP/CTL SYS1/1/115VAC1HHX22
122VUAIR COND/PACK TEMP/CTL SYS1/1/28VDC3HHX21
122VUAIR COND/PACK TEMP CTL SYS2/1/28VDC4HHY19
122VUAIR COND/PACK TEMP CTL SYS2/1/115VAC2HHY18
** ON A/C NOT FOR ALL
122VUAIR COND/TEMP CTL SYS 1/CHAN A/115VAC49HHX22
122VUAIR COND/TEMP CTL SYS 1/CHAN A/28VDC51HHX21
122VUAIR COND/TEMP CTL SYS 1/CHAN B/115VAC50HHY18
** ON A/C NOT FOR ALL
FOR FIN: 21HM (P2 WATER INJECTOR)
122VUAIR COND/PACK TEMP/CTL SYS1/2/115VAC21HHW22
122VUAIR COND/PACK TEMP/CTL SYS1/2/28VDC23HHW21
122VUAIR COND/PACK TEMP CTL SYS2/2/28VDC24HHY21
122VUAIR COND/PACK TEMP CTL SYS2/2/115VAC22HHY20
** ON A/C NOT FOR ALL
122VUAIR COND/TEMP CTL SYS 2/CHAN A/115VAC53HHW22
122VUAIR COND/TEMP CTL SYS 2/CHAN A/28VDC55HHW21
122VUAIR COND/TEMP CTL SYS 2/CHAN B/28VDC56HHY21
122VUAIR COND/TEMP CTL SYS 2/CHAN B/115VAC54HHY20
Subtask 21-52-42-410-051-A
B. Close Access
   (1) Install the access panel/s (Ref. AMM TASK 53-35-13-400-002).
     (a) FOR [20HM] (P1 WATER INJECTOR)
     (b) FOR [21HM] (P2 WATER INJECTOR)
   (2) Remove the WARNING NOTICE(S).
Subtask 21-52-42-862-050-A
C. De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
[Rev.10 from 2021] 2026.04.02 06:47:31 UTC
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