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conditioning ducts downstream of the secondary heat
exchangers.
Physical Description
The water extractor ducts have these parts:
* Inlet
* Outlet
* Sump
* Drain boss.
These devices support the extractor ducts:
* Flange clamp (inlet)
* Rubber hose and band clamps (outlet).
Functional Description
The water extractors are coaxial split-can type gravity fluid
separators.
Water in the airstream falls into the sump of the water extractor
duct. The sump collects the water and pressure in the extractor
forces the water out of the sump into the drain boss. A line
connects the drain boss to the water spray nozzle.
AIR CONDITIONING - COOLING - WATER EXTRACTOR DUCT
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-50-00-818
AIR CONDITIONING - COOLING - WATER EXTRACTOR DUCT
AIR CONDITIONING - COOLING - WATER EXTRACTOR DUCT
EFFECTIVITY
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21-50-00-818
Purpose
The reheater increases the temperature of the air in the air
conditioning pack before it enters the turbine of the air cycle
machine. This increases the efficiency of the turbine.
Location
There are two reheaters, one for each air conditioning pack.
The reheaters are part of high pressure water separator
assemblies. These assemblies are in the forward area of the air
conditioning pack compartments.
Physical Description - Reheaters
The reheaters have these features:
* Inlet (hot stream from secondary heat exchanger)
* Outlet (cooled) to condenser
* Reheater core case
* Inlets (cold stream from water extractors)
* Outlet (warmed) to air cycle machine turbine
* Pack sensor bosses.
These pack bulbs are on the reheater:
* Pack temperature sensor
* Pack temperature bulb.
Functional Description
The reheater is a a plate-fin, single-pass, crossflow, air-to-air
heat exchanger. It is made of aluminum.
The reheater is a regenerative-type heat exchanger. It has
these functions:
* Precools the pack air from the secondary heat exchanger
before it enters the condenser
* Reheats the pack air as it leaves the water extractors.
Training Information Point
The reheater is part of the high pressure water separator
assembly. To remove the reheater, first remove the water
separator assembly.
You must remove the left air conditioning pack high pressure
water separator to get access to the center fuel tank access
panel.
AIR CONDITIONING - COOLING - REHEATER
EFFECTIVITY
GUN 001-099, 201-999 21-50-00
Page 98.14
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-50-00-819
AIR CONDITIONING - COOLING - REHEATER
AIR CONDITIONING - COOLING - REHEATER
EFFECTIVITY
GUN 001-099, 201-999 21-50-00
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-50-00-819
Purpose
The condenser decreases the temperature of the air in the air
conditioning pack to below the dew point. This causes the water
vapor in the airstream to go into a liquid form.
Location
There are two condensers, one in each air conditioning pack.
The condensers are part of the high pressure water separator
assemblies. These assemblies are in the forward area of the air
conditioning pack compartments.
Physical Description
The condenser has these parts:
* Inlet (hot stream from reheater)
* Outlet (warmed) to pack discharge check valve
* Outlet manifold (cooled) to water extractors
* Condenser core case
* Inlet (cold stream from turbine discharge)
* Delta pressure sense line bosses.
Functional Description
The condenser is a plate-fin, single-pass, crossflow, air-to-air
heat exchanger. It is made of aluminum.
The condenser uses turbine discharge air to cool the pack air
after it makes the first pass through the reheater.
The air cools enough to condense moisture. Part of the cold air
bypasses around the condenser core and warm air comes
through de-icing passages in the face of the core to prevent ice
on the cold air face of the core. A free passage between the two
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