3) Set the bleed switch on the ground cart to off when the container of water is empty.
CAUTION: DO NOT PERMIT HOT BLEED AIR WITHOUT WATER TO GO THROUGH THE RAM AIR DUCTS. WITHOUT THE WATER TO DECREASE THE TEMPERATURE OF THE HOT BLEED AIR, DAMAGE TO THE RAM AIR DUCTS CAN OCCUR.
4) Do the steps above again until all of the detergent is removed from the heat exchangers.
(g)
Close bleed air valve on the ground cart.
(h)
Look at the gage on the reverse flusher and make sure the pressure is 0 psig.
(i)
Remove the pneumatic hose from the ground cart and the reverse flusher.
WARNING: WEAR GLOVES THAT WILL GIVE YOU PROTECTION FROM HOT SURFACES WHEN YOU CONNECT OR DISCONNECT PNEUMATIC FITTINGS. THE BLEED AIR FITTING ON THE GROUND CART CAN BE VERY HOT IF THE GROUND CART HAS BEEN OPERATED IMMEDIATELY BEFORE THIS PROCEDURE. YOU CAN BADLY BURN YOUR HANDS IF YOU TOUCH A HOT FITTING ON THE GROUND CART.
E. Put the Airplane Back to Its Usual Condition
(1)
Remove the hose with the quick-disconnect fitting from the reverse flusher.
(2)
Remove the reverse flusher from the exhaust louvers for the ram air.
(3)
Install the access panels to the heat exchangers.
(4)
Close the access door for the ram air ducts.
(5)
Close the bay doors to the air conditioning equipment.
501
Feb 01/96 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 21-51-21 Page 705
WATER SEPARATOR - REMOVAL/INSTALLATION
1. Equipment and Materials
A. Antiseize - EASE-OFF 990 (Ref 20-30-21)
2. Remove Water Separator
A. Lower air conditioning equipment bay door.
B. Remove electrical connector from 35°F temperature sensor.
C. Remove clamp holding overboard drain seal to water separator drain boss and retain seal for use on new water separator (Fig. 401).
D. Disconnect duct clamps from forward and aft ends of water separator.
E. Support water separator and remove support bracket clamp.
F. Remove water separator.
G. Remove 35°F temperature sensor and retain for use on new water separator.
3. Install Water Separator
A. Apply light coating of antiseize to 35°F temperature sensor threads, then install in water separator and lockwire.
B. Install 35°F temperature sensor in water separator and lockwire.
C. Position water separator to support bracket with flow arrow pointing forward and install but do not tighten support clamp.
D. Turn water separator as required to align electrical connector and water separator drain boss and install duct clamps loosely.
E. Tighten water separator support bracket clamp.
F. Tighten duct clamps.
G. Install overboard drain seal and clamp to drain boss.
H. Provide electrical power.
I. Pressurize pneumatic system.
J. Operate air conditioning system with mix valve at full cold position and check for air leakage at clamps.
NOTE: With air conditioning system operating, check at clamps by feeling and listening. Diffused leakage is allowed at any clamp, however, jet blasts are not permissible.
K. Check that 35°F control valve position indicator is at full open.
L. Install temperature sensor electrical connector and check that 35°F valve moves toward closed then modulates.
M. Remove pneumatic power if no longer required.
N. Position pack switches to OFF.
O. Close air conditioning equipment bay door.
P. Remove electrical power if no longer required.
502
Oct 20/85 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 21-51-31 Page 401
Water Seperator Installation 504
21-51-31 Figure 401 May 15/68
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
WATER SEPARATOR COALESCER (BAG) - REMOVAL/INSTALLATION
1. General
A. The water separator coalescer (bag) is positioned around the bag support and secured at each end by a bead chain assembly and two springs. (See figure 401.)
2. Equipment and Materials
A. Grease - Dow Corning High Vacuum, -40° to 400°F or equivalent
3. Remove Water Separator Bag
A. Lower air conditioning equipment bay doors.
B. Remove duct clamp at aft end of water separator.
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