BOAC
You know I respect You ,but we speak here about Temp. control
CABIN TEMPERATURE CONTROLLER
Control and passenger cabin automatic temperature regulation is obtained from a single unit located in the electronic compartment. This unit contains all parts of each regulation system which are not required to be mounted remotely. Separate identical networks are enclosed for each cabin.
The regulator receives signal from the temperature selectors, cabin temperature sensors, and duct temperature sensors. It drives the mix valves toward hot or cold to maintain an actual cabin temperature (sensed) equal to desired (selected)
And by the way, packs are controlled on the NG by a single ACAU (Air Conditioning Accessory Unit)
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