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EFFECTIVITY
GUN 101-118 21-60-00
Page 14
D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-60-00-013
AIR CONDITIONING - TEMPERATURE CONTROL - DUCT TEMPERATURE LIMIT SENSOR
AIR CONDITIONING - TEMPERATURE CONTROL - DUCT TEMPERATURE LIMIT SENSOR
EFFECTIVITY
GUN 101-118 21-60-00
Page 15
D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-60-00-013
Purpose
The cabin temperature controller (CTC) controls the
temperature of conditioned air for the cabin areas.
Location
The CTC is in the EE compartment on the E4-1 rack.
Physical Description
It has BITE controls and instructions on the front face.
AIR CONDITIONING - TEMPERATURE CONTROL - CABIN TEMPERATURE CONTROLLER
EFFECTIVITY
GUN 101-118 21-60-00
Page 16
D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-60-00-014
AIR CONDITIONING - TEMPERATURE CONTROL - CABIN TEMPERATURE CONTROLLER
AIR CONDITIONING - TEMPERATURE CONTROL - CABIN TEMPERATURE CONTROLLER
EFFECTIVITY
GUN 101-118 21-60-00
Page 17
D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-60-00-014
Purpose
The air mix valve adjusts the proportions of hot and cold air that
goes into the pack and the distribution system.
Location
The air mix valve is in the aft inboard area of the air
conditioning compartment.
Physical Description
These are the parts of the air mix valve:
* Electromechanical rotary actuator
* Dual butterfly valves (hot and cold)
* Electrical connection
* Position transmitter
* Visual position indicator.
The dual housing assembly has two butterfly valves on the
same shaft. Each valve is 90 degrees to the other.
There is a visual position indicator on the valve. It shows the
valve in the COLD or the HOT range.
Functional Description
The valve has an electric actuator. The valve gets 115v ac,
single-phase power. The hot valve opens and the cold valve
closes when the actuator gets power to the open field.
The position transmitter is a potentiometer. It sends signals to
the air mix valve position indicator on the cabin temperature
controls panel.
Training Information Point
You can adjust the position transmitter to make adjustments to
the air mix valve indicators.
AIR CONDITIONING - TEMPERATURE CONTROL - AIR MIX VALVE
EFFECTIVITY
GUN 101-118 21-60-00
Page 18
D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-60-00-018
AIR CONDITIONING - TEMPERATURE CONTROL - AIR MIX VALVE
AIR CONDITIONING - TEMPERATURE CONTROL - AIR MIX VALVE
EFFECTIVITY
GUN 101-118 21-60-00
Page 19
D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-60-00-018
Purpose
The hot air check valve prevents reverse airflow into the air mix
valve.
Location
The hot air check valve is in the distribution bay. You get access
through the distribution bay access panel in the aft section of
the forward cargo compartment.
There is one hot air check valve for each pack.
Physical Description
The hot air check valve has these parts:
* Housing
* Shaft supports
* Split-flapper valve (not shown).
There is a flow direction arrow on the valve housing.
Two v-band clamps hold the valve in place.
Functional Description
The valve is a split-flapper type check valve. Two semi-circular
flappers attach to a hinge. The hinge attaches to a shaft that
runs through the center of the valve housing. Usual airflow will
open the flappers. Reverse airflow closes the flappers.
Training Information Point
Install the hot air check valve with the flow arrow in the correct
direction. The flow arrow points forward.
AIR CONDITIONING - TEMPERATURE CONTROL - HOT AIR CHECK VALVE
EFFECTIVITY
GUN 101-118 21-60-00
Page 20
D633A101-GUN Oct 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
21-60-00-019
AIR CONDITIONING - TEMPERATURE CONTROL - HOT AIR CHECK VALVE
　
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