Embraer EMB145 Operation Manual page 2080

CABIN TEMPERATURE CONTROL
AUTO MODE
In the automatic mode (temperature knobs pressed), the temperatures
in the passenger cabin and in the cockpit are controlled by the digital
temperature controllers that receive information from the temperature
sensors (ducts, passenger cabin, or cockpit), maintaining the
temperature set on the associated temperature knob.
MANUAL MODE
In manual mode (temperature knobs pulled), the temperature in the
passenger cabin and in the cockpit are controlled by the temperature
control module, that receives information from the temperature knobs
and the duct temperature sensor.
The manual mode should be used only if a failure occurs in the
automatic mode and may be noticed when the temperature is not
maintained within the temperature limits of the automatic mode
(between 18 and 29°C) after cabin temperature stabilization.
If switching from auto mode to manual mode is required, proceed as
follows:
− Set the knob to mid range position (12 o'clock).
− Wait for system to stabilize (approximately 30 seconds).
− Switch to manual.
− Smoothly turn the knob to the required point.
Once in the manual mode, the pilot must continuously monitor the
temperature and actuate on the Temperature and Mode Selector Knob.
NOTE: On airplanes Pre-Mod. SB 145-21-0011, for cruise flight times
of 1:30 h or longer, it is recommended that the passenger
cabin temperature be controlled by using the manual mode.
REVISION 38
AIRPLANE
OPERATIONS
MANUAL
PNEUMATICS
AIR CONDITIONING
AND PRESSURIZATION
Page
2-14-10 5
Code
01