AIR COND / PNEUMATIC

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RECIRC BUTTON

PUSH IN: Allows automatic operation by the AMS. Turns on both recirculation fans, according to system logic.

PUSH OUT: Turns off both recirculation fans.

PACK (1) (2) BUTTON

PUSH IN: Allows automatic operation by the AMS. Opens the respective pack flow control valve.

PUSH OUT: Manually closes the respective pack flow control valve.

NOTE: During first engine start, Emergency Ram Air Valve Built-In Test (BIT) commands PACK 1 OFF.

BLEED (1) (2) BUTTON

PUSH IN: Allows automatic operation by the AMS. Commands the respective engine bleed valves, according to system logic.

PUSH OUT: Manually closes the engine bleed valves.

CKPT TEMPERATURE SELECTOR

Controls cockpit temperature relative to the knob position.

PAX CABIN TEMPERATURE SELECTOR

Controls passenger cabin temperature relative to the knob position.

ATTND position: Enables the flight attendant panel(s) to control the cabin temperature. An “ENABLED” led turns on in the flight attendant panel(s) indicating they have control of the temperature.

XBLEED BUTTON

PUSH IN: Allows automatic operation by the AMS. This position opens the cross-bleed valve, according to system logic.

PUSH OUT: Manually closes the cross-bleed valve.

BLEED APU BUTTON

PUSH IN: Allows automatic operation by the AMS. Commands the APU bleed valve, according to system logic.

PUSH OUT: Closes the APU bleed valve.