Daher TBM 700, Pilot'S Manual

Page: 569 / 991

TBM
PILOT’S OPERATING HANDBOOK 700
SECTION 7
DESCRIPTION
Page 7.9.6 Rev. 2
When vapor cycle cooling system operation is requested by the controller,
the compressor pressurizes the refrigerant and discharges it to the
condenser heat exchanger through the HP pressure switch.
At the condenser heat exchanger outlet, refrigerant cooled by the condenser
fan flows through the receiver drier to the thermal expansion valve located at
the evaporator heat exchanger inlet.
The temperature control/sensor monitors the hose temperature at the
evaporator heat exchanger outlet and pilots the thermal expansion valve
opening or closing to control the refrigerant flow through the exchanger.
The expansion of the high pressure liquid refrigerant to a low pressure liquid
extracts heat from the cabin air flowing through the evaporator and the low
pressure refrigerant gas flows back to the compressor through the LP
pressure switch.
The evaporator fan sucts hot and moistened cabin air through the evaporator
heat exchanger and expells it cold and dry in a duct where it is blown into the
cabin overhead duct equipped with air outlets and through air outlets located
on arm rests of pilot and R.H. front passenger stations.
The system operates under two modes :
-- engine running with ”GENERATOR” selector on “MAIN”,
-- engine off with ”SOURCE” selector on “GPU”.
The system includes an automatic load shedding feature which operates
when :
-- ”GENERATOR” selector is on “ST--BY”,
-- ”AIRFRAME DE--ICE” switch is “ON”,
-- ”PROP DE--ICE” switch is “ON”,
-- engine is started with system fed by a GPU.