Daher-Socata TBM 900 Pilot's Information Manual page 448

PILOT'S OPERATING HANDBOOK
Heating circuit
Hot air coming from the bleed air system is mixed with the cabin recirculating air in the Mixing Ejector (MIXEJ) in
order to lower the blown air temperature. The resultant air flow enters the Hot Air Distributor (HAD) and is
distributed in the cockpit / cabin zones regarding the demand.
It is dispatched :
- in the cockpit through ports located on pedestal sides, under each seat or through the demisting outlets.
- in the cabin through ports located on the lower section of the L.H. and R.H. side cabin upholstery.
The "HOT AIR FLOW" distributor allows to select the windshield defog / cabin heating functions.
When the "A/C" switch is set to OFF position, the temperature is set by default by the GASC to 23°C.
Cooling circuit
There are two separate circuits : one for the cockpit and the other for the cabin.
In each circuit, air is sucked by means of a variable speed electrical fan, then it is blown through an evaporator and
ducted to the different zones :
- cockpit circuit : by passing into the upper panel equipped with 2 swivelling and adjustable air outlets, through
air outlets located on arm rests of pilot and R.H. front passenger stations and through ports located under
instrument panel,
- cabin circuit : by passing into the overhead duct equipped with 4 swivelling and adjustable air outlets and
through ports located on the floor between the cabinets and the intermediate passenger's seats.
The VCS can be switched on, only if the fans are set at least to minimum speed. The compressor clutch and the
condenser fan are controlled by the GASC.
In automatic mode, the temperature of each zone is controlled independently by the system according to the
settings of the "TEMP/° C" and "CABIN TEMP/° C" selectors, which can vary from 17°C to 27°C. In this mode, the
speed of each fan is automatically controlled.
In manual mode, the blown air temperature is controlled by the system according to the settings of each
temperature selector. In this mode, the speed of each fan is set manually from Off to maximum speed position.
The "A/C" switch allows to switch on or off the Vapor Cycle System.
- If set to AUTO position :
. on "ECS" panel, the "TEMP/° C" selector enables to select requested temperature of the cockpit zone,
. above arm rest of L.H. passenger's seat, the "CABIN TEMP/° C" selector enables to select requested
temperature of the cabin zone.
- If set to MANUAL position :
. on "ECS" panel, the "TEMP/° C" selector enables to select requested temperature and the "FAN
SPEED" selector enables to choose blown air speed in the cockpit zone,
. above arm rest of L.H. passenger's seat, the "CABIN TEMP/° C" selector enables to select requested
temperature and the "FAN SPEED" selector enables to choose blown air speed in the cabin zone.
The "CONTROL" selector set to COCKPIT position inhibits the operation of the controls located in the cabin zone ;
only the cockpit controls settings are taken into account. If set to CABIN position, each zone controls its proper
values.
Emergency air control ("EMERGENCY RAM AIR" control knob), located under R.H. area instrument panel facing
control wheel, enables outside air to enter the cabin through a valve. In NORMAL position, the valve is closed and
the control is locked. To open emergency ventilation valve, press on locking knob and move control rearwards.
Edition 0 -- October 31, 2013
Rev. 1
SECTION 7
DESCRIPTION
Page 7.9.3