Hawker Beechcraft Hawker 800XP, Руководство по эксплуатации для пилотов

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Page 10-11
Pilot’s Operating Manual
Revision A1: Nov, 2002
Sub-section 10
ENVIRONMENTAL
Hawker 800XP Pro Line 21
Section III - SYSTEMS DESCRIPTION
AUXILIARY HEATING SYSTEM
The auxiliary heating system supplies the flight compartment with a variable supply of hot air via a heat
augmentor in the main supply system. Control of the auxiliary system valve is by the F/DK VLV switch
on the overhead roof panel.
The supply is tapped from upstream of the main air valve of No. 2 engine via a non return valve. If, while
the flight compartment auxiliary heating valve is open, an overheat of 115° C is detected in the outlet
duct, then the flight compartment auxiliary heating valve is closed, and remains closed until selected
manually open.
RAM AIR
Ram air from the dorsal air intake is used primarily as a cooling medium for the heat exchanger but it
can also be introduced into an unpressurized cabin for ventilation purposes. The cabin supply is ducted
from the ram air intake and fed into the cabin through an electrically operated ram air valve and a non
return valve, and into the flood flow duct.
The ram air valve is controlled by a micro-switch which operates when the DUMP VALVE lever is
selected fully OPEN.
The ram air passes through the CAU heat exchanger assisted by a fan driven by the CAU turbine, and
is ducted to atmosphere through a grille in the airplane skin. If the intake becomes obstructed, a spring
loaded door in the intake duct opens inwards to permit air from the rear equipment bay to enter the
intake and supply the CAU heat exchanger.
CLOSE
F/DK VLV
OPEN
Overhead Roof Panel