Air Mix Valves and Temperature Controller
The two air mix valves for each pack control hot and cold air according to the
setting of the CONT CABIN or PASS CABIN temperature selector. Air that flows
through the cold air mix valve is processed through a cooling cycle and then
combined with hot air flowing from the hot air mix valve.
In the automatic temperature mode, the air mix valves are operated by the
automatic temperature controller. The automatic temperature controller uses
inputs from the respective temperature selector and cabin temperature sensor.
The automatic temperature controller is bypassed when the temperature selector
is positioned to MANUAL.
Anytime the pack valve closes, the air mix valves are driven to the full cold
position automatically. This aids startup of the cooling cycle and prevents
nuisance hot air trips when the pack is turned on.
The two air mix valves for each pack control hot and cold air according to the
setting of the CONT CABIN or PASS CABIN temperature selector. Air that flows
through the cold air mix valve is processed through a cooling cycle and then
combined with hot air flowing from the hot air mix valve.
In the automatic temperature mode, the air mix valves are operated by the
automatic temperature controller. The automatic temperature controller uses
inputs from the respective temperature selector and cabin temperature sensor.
The automatic temperature controller is bypassed when the temperature selector
is positioned to MANUAL.
Anytime the pack valve closes, the air mix valves are driven to the full cold
position automatically. This aids startup of the cooling cycle and prevents
nuisance hot air trips when the pack is turned on.
