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EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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AIR CONDITIONING - COOLING - SECONDARY HEAT EXCHANGER AND PLENUM/DIFFUSER ASSEMBLY
AIR CONDITIONING - COOLING - SECONDARY HEAT EXCHANGER AND PLENUM/DIFFUSER ASSEMBLY
EFFECTIVITY
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Purpose
The low pressure water separator mix muff is a chamber that
mixes hot air into the airstream that goes into the water
separator. This prevents ice in the water separator.
Location
The low pressure water separator mix muff is in the forward
section of the air conditioning compartment. It is downstream
(forward) of the air cycle machine (ACM), and upstream (aft) of
the water separator.
Physical Description
The low pressure water separator mix muff has three flanges
and a mix chamber. The airflow direction shows on the outside
body of the mix muff with an arrow.
A small port on the side of the mix muff receives warm air from
the ACM turbine case.
The low pressure water separator mix muff has V-band clamp
flange connections.
AIR CONDITIONING - COOLING - LOW PRESSURE WATER SEPARATOR MIX MUFF
EFFECTIVITY
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D633A101-GUN Oct 10/2006
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AIR CONDITIONING - COOLING - LOW PRESSURE WATER SEPARATOR MIX MUFF
AIR CONDITIONING - COOLING - LOW PRESSURE WATER SEPARATOR MIX MUFF
EFFECTIVITY
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D633A101-GUN Oct 10/2006
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THIS PAGE IS INTENTIONALLY LEFT BLANK
AIR CONDITIONING - COOLING - LOW PRESSURE WATER SEPARATOR MIX MUFF
21-50-00
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D633A101-GUN Jun 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
Purpose
The cold air from the air cycle machine can contain moisture
(atomized water mist). The water separator collects and
removes the moisture from the pack air before it goes into
the distribution system.
Location
The water separator is in the air conditioning compartment,
downstream of the air cycle machine.
Physical Description
The water separator is a cylindrical chamber with a taper at the
upstream end. The chamber has an inlet and outlet shell. The
inlet and outlet shells attach together to make an assembly.
This assembly contains these items:
* Inlet shell
* Coalescer (bag)
* Bag condition indicator
* Outlet shell
* Boss for low limit 35F temperature sensor
* Collection chamber
* Overboard water drain
* Coalescer support (louvered)
* Bypass valve assembly.
The coalescer bag is a dacron polyester material, with a conical
shape. It fits over the coalescer support.
Functional Description
Air goes into the water separator inlet and through the
coalescer bag and support. The coalescer bag collects water
mist from the air. The mist becomes water droplets as more
moisture goes through the bag. The coalescer support has slots
that move the air in a circular motion. The air with the water
droplets moves around the internal part of the coalescer
support to the collection chamber.
The collection chamber is a baffle that causes the water and air
to make a sharp bend out of the outlet shell. This separates the
heavier water droplets while the air moves out freely.
The overboard water drain connects to the air conditioning
access door drain fitting. The overboard water drain has a boss
for water injection to the heat exchangers.
The bypass valve is spring-loaded closed. It opens when air can
not pass through the coalescer bag because of clogs or water
freeze. When the air pressure is more than the spring force, the
valve opens.
AIR CONDITIONING - COOLING - WATER SEPARATOR
EFFECTIVITY
GUN 101-118 21-50-00
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D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-50-00-016
Indication
As dirt and contamination collect on the coalescer bag, air flow
　
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