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EFFECTIVITY
GUN 101-118 21-00-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-00-00-004
Zone Temperature Control
This part of the A/C system controls the temperature in the two
zones, the flight compartment and the passenger cabin. The
temperature changes are made by the mix valve with signals
from the temperature regulator.
See the zone temperature control section for more information
about the zone temperature control systems. (SECTION 21-60)
Recirculation
This part of the A/C system recycles 50 percent of the cabin air
for ventilation purposes. This reduces the quantity of fresh air
necessary from the pneumatic system for ventilation. The
recirculation fan and filter are the primary components.
See the recirculation section for more information about the
recirculation systems. (SECTION 21-25)
AIR CONDITIONING - FUNCTIONAL DESCRIPTION
EFFECTIVITY
GUN 101-118 21-00-00
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D633A101-GUN Oct 10/2006
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-00-00-004
AIR CONDITIONING - FUNCTIONAL DESCRIPTION
AIR CONDITIONING - FUNCTIONAL DESCRIPTION
EFFECTIVITY
GUN 101-118 21-00-00
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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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.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
21-00-00-004
Purpose
The air conditioning system controls the interior environment of
the airplane for flight crew, passengers, and equipment.
Air Conditioning Sub-Systems
These are the air conditioning sub-systems:
* Distribution
* Pressurization
* Equipment cooling
* Heating
* Cooling
* Temperature control.
Abbreviations and Acronyms
* A/C - air conditioning
* ACAU - air conditioning accessory unit
* C - Celsius
* clng - cooling
* CPC - cabin pressure controller
* EE - electronic equipment
* F - Fahrenheit
* PZC - pack/zone temperature controller
* TCV - temperature control valve
* FLT COMPT - flight compartment
AIR CONDITIONING - INTRODUCTION
EFFECTIVITY
GUN 001-099, 201-999 21-00-00
Page 14
D633A101-GUN Oct 10/2005
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-00-00-801
AIR CONDITIONING - INTRODUCTION
AIR CONDITIONING - INTRODUCTION
EFFECTIVITY
GUN 001-099, 201-999 21-00-00
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-00-00-801
General
These flight compartment panels let you control the air
conditioning system:
* Air conditioning/bleed air controls panel, P5-10
* Cabin temperature panel, P5-17
* Equipment cooling panel, P5
* Cabin pressure control panel, P5-6.
These components in the EE compartment control the functions
of the air conditioning system:
* Two pack/zone temperature controllers
* Two air conditioning accessory units (ACAU)
* Cabin pressure controllers (CPC).
Pack/Zone Temperature Controller
The pack/zone temperature controllers control these functions
of the air conditioning system:
* Pack cooling temperature
* Trim air, regulation, on or off
* Zone temperature.
Air Conditioning Accessory Unit
The air conditioning accessory units are the interface for the
airplane operational logic and the air system.
Cabin Pressure Controller
The cabin pressure controllers control the cabin pressure
function of the air conditioning system.
AIR CONDITIONING - GENERAL DESCRIPTION
EFFECTIVITY
GUN 001-099, 201-999 21-00-00
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D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-00-00-803
AIR CONDITIONING - GENERAL DESCRIPTION
AIR CONDITIONING - GENERAL DESCRIPTION
EFFECTIVITY
GUN 001-099, 201-999 21-00-00
Page 17
D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-00-00-803
General
These flight compartment panels on the P5 forward overhead
panel let you control the air conditioning subsystems:
* Cabin temperature panel, P5-17
* Air conditioning/bleed air controls panel, P5-10
　
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