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HEATING CONTROLLER
The cargo heating system part is controlled by the
cargo heating controller.
The heat controller receives temperature indications
from two temperature sensors and controls the Trim Air
Valve in order to regulate the amount of hot air added
to cabin ambient air.
It closes the Trim Air Valve when:
- the isolation valve is closed,
- the cargo HOT AIR Pressure Regulating Valve is
closed,
- the extract fan has failed,
- the cargo door is not closed and locked.
It also determines the Trim Air Valve position by means
of a step counter (it counts the steps of the TAV
stepper motor).
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AFT CARGO COMPARTMENT VENTILATION/HEATING - SYSTEM PRESENTATION
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21 - AIR CONDITIONING
21-43-00 AFT CARGO COMPARTMENT
VENTILATION/HEATING -
SYSTEM CONTROLS PRESENTATION
CONTENTS:
Aft Isol Valve Pushbutton
Temperature Selector
Hot Air Pushbutton
Self Examination
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AFT ISOL VALVE PUSHBUTTON
The AFT ISOL VALVE pushbutton controls the isolation
valves and the extraction fan through the ventilation
controller.
When it is pressed in, the cargo ventilation controller
will start the extract fan (only if both isolation
valves are fully open).
When it is set to OFF or if smoke is detected, the
isolation valves are closed and the extract fan stops.
TEMPERATURE SELECTOR
The temperature rotary selector gives the desired
temperature to the heating controller which controls
the Trim Air Valve to add hot air to cabin ambient
air, if necessary.
The selector temperature range is between 5ºC (41ºF)
and 26ºC (79ºF) with 16ºC (60ºF) at the 12 o’clock
position.
HOT AIR PUSHBUTTON
The hot air pushbutton switch is used to control the
cargo HOT AIR Pressure Regulating Valve (PRV).
When it is set to OFF, the valve is closed.
Note In case of duct temperature above 88ºC (190ºF),
the heating controller controls the cargo HOT AIR
Pressure Regulating Valve to close.
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SELF EXAMINATION
The HOT AIR pushbutton switch controls the:
A - Blower fan.
B - Aft cargo door.
C - Pressure Regulating Valve.
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21-43-00 AFT CARGO COMPARTMENT
VENTILATION/HEATING -
ECAM PAGE PRESENTATION
CONTENTS:
General
Cargo Compartment Temperature
Zone Indication
Duct Inlet Temperature
Trim Air Valve
Pressure Regulating Valve
Inlet Isolation Valve
Outlet Isolation Valve
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AFT CARGO COMPARTMENT VENTILATION/HEATING - ECAM PAGE PRESENTATION
GENERAL
The AFT cargo compartment can be optionally equipped
　
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