Hawker 800 XP, Pilot Training Manual

Page: 302 / 504

10-10
FOR TRAINING PURPOSES ONLY
HAWKER 800 XP PILOT TRAINING MANUAL
FlightSafety
international
Power distribution is as follows.
Vane heater power supply is 115 VAC and is
derived as follows:
• Two windscreen alternators on line:
• Left sensor elements from alternator
No. 1
• Right sensor elements from alterna-
tor No. 2
• One windscreen alternator off line and
No. 1 and No. 2 inverters on line:
• Elements of both sensors from No. 2
inverter
• One windscreen alternator off line and
either No. 1 or No. 2 inverter off line:
• Elements of both sensors disconnected
ENGINE ANTI-ICING
SYSTEM
Air is bled from each engine to provide anti-
icing for the engine nacelle inlet cowling.
An ENG ANTICE switch on the roof panel (see
Figure 10-3) is provided for each engine. Each
switch controls pneumatically operated bleed
air valves. When the switch is in the ON po-
sition, the valves deenergize open and high-
pressure bleed air is bled from the engine and
directed to the inlet cowling. In addition, with
O N s e l e c t e d a n d t h e c o m p u t e r s w i t c h i n
AUTO, electrical power is supplied to the
heating elements on the P
T2
T
T2
sensor (Figure
10-7). The ON position also controls the raised
heat level for the A panel windshield in flight.
In flight, the engine digital computers are
reset to a schedule that incorporates a raised
idle rpm to compensate for the effect on thrust.
A pressure switch in each supply line (Figure
10-8) connects electrically to an associated
ENG 1 or ENG 2 A/ICE annunciator. The an-
nunciator will come on dim initially and
brighten up after two seconds if air supply is
not sufficient for engine anti-icing. In addition,
a white ICE PROT SELECTED annunciator on
the MWS panel illuminates when either ENG
ANTICE switch is on.
The engine anti-icing system is DC powered
from bus bar PE.
COMPONENTS BUSBAR
Left pitot head
heater
PE
Right pitot head
heater
PS2
Pitot heater fail
warning
PE
Rudder bias strut
heaters
Half PS1
Half PS2
Forward static
plates
PS2