Hawker Beechcraft Hawker 800XP, Руководство по эксплуатации для пилотов

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Page 10-4
Pilot’s Operating Manual
Original Issue: Feb, 2002
Sub-section 10
ENVIRONMENTAL
Hawker 800XP Pro Line 21
Section III - SYSTEMS DESCRIPTION
Time delay units are incorporated in the open circuit of the MAVs to prevent an initial surge of air to the
cabin. The No. 1 MAV has a staggered open/delay logic control, and takes approximately 20 seconds
to reach the fully open position. The No. 2 MAV is fast acting but is delayed by 30 seconds before
running fully open in approximately one second.
PRESSURE REGULATOR and SHUT-OFF VALVE
From each main air valve the air is ducted via a non-return valve, and then via a common duct to a
pressure regulator and shut-off valve unit, (PRSOV) and a pressure reducing and flow restricting venturi
to an air cycle machine.
AIR CYCLE MACHINE
The air cycle machine (ACM) consists of a three-wheel cold air unit (CAU), and primary and secondary
heat exchangers which are cooled by ram air. Excess water is removed by a water separator at the exit
from the ACM. To enhance the cooling performance this water is ejected back into the ram air flow
above the primary heat exchanger.
CLOSE
MAIN AIR VLV
1 OPEN 2
LP
ON
Overhead Roof Panel
water
separator
to Cabin
from
PRSOV
Ram Air Inlet
Primary
Heat Exchanger
Secondary
Heat Exchanger
Fan
Turbine
Compressor
Pressure
Switch
(Overspeed
protection)
Low Limit Temperature
Control Valve
Duct
Low Limit
Temperature
Sensor
Water
injection