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to r&act the hook while airborne. On deck,
only combined hydraulic system pressure is
required to retract the hook
2.30 ENVIRONMENTAL CONTROL SYSTEM
The ECS regulates the environment of flightcrew
and electronic equipment. The system provides temperaturecontrolled,
pressure-regulateda ir for the following
systems.
1. E~temal drop tank pressurixation
2. OBGGS
3. Cockpit pressurixation
4. canopy seals
5. Windshield and canopy defogging
6. Windshield anti-ice
7. Anti-g suit inflation
8. Wing airbag seals
9. Gun-gas purging
10. Electronic equipment cooling and pressurization
11. Temperatom control of liquid coolant supplied to
APG-71 radar control system, television camera
set, and intiamd search and track.
2.30.1 ECS Air Sources
2.30.1.1 Bleed Air. The normal source of ECS air is
ninth-stageb leed air from both engines.T hrough a series
of manifolds and valves, this air is cooled and mixed to
reducet emperatuma nd pressureto usablel evels.T he primary
valves are the two engine bleed air shutoff valves,
the dual pressurer egulating and shutoff valve, and the
turbme compressomr odulating and shutoffv alve, which
are all contmlled by the AlR SOURCE selector pushbuttons:
L ENG, R ENG and BOTH ENG (Figure 2-76.)
2.30.1.2 Ram-Air Source. If either the RAM or
OFFpushbuttonisselectedbythepilot,thecoolingturbine
compmssorisshutdowuandemergencyramaircanbc
usedtoventilatethewckpits andprovidecoolingairtothe
servicea nd suit heat exchangear nd thosee l&tonic subsystems
rquiring forced air cooling. However, if OFF is
sel@ pressurizationt o the service systems (canopy
seal, anti-g suit, external fuel tank, wing airbag seal,
OBGGS),and400°Fairsupplytothewindshieldairdefog
andheatingsystemsislost.SelectingAlRSGURCERAM
willprovideairtotbe~systemsand400’Fmmanifold
air to the &fog and heating systems.
Selection of the AIR SOURCE pushbutton
to RAM with a failure of the 400 OF temperature
manifold will continue to circulate
400 OF air throughout the system surromiding
aircratt components and may cause a tire.
ORIGINAL 2132
NAVAIR 0%Fl4AAD.1
RIO CAUTION/ADVISORY
PANEL
NOMENCLATURE FUNCTtON
0 1 TEMP mode selector AUTO - Cockpit and pressure suit temperature is automatically
switch maintained at that comfort level selected on the temperature
control selector.
MAN - Cockpit temperature and air flow must be manually selected as
airspeed and attitude change to malntain a desired
temperature.
02 CABIN PRESSs witch NORM - Cockpit pressurew ill be maintaineda t an altitude of S,ooOf eet
Lever-lock switch which up to 23,WJ feat, above which the regulator maintains a 5-psi
must be lifted to be pressure differential.
moved to DUMP
DUMP - The cockpit Safetyv alve Is opened, depressurizingt he cockpit.
0 RAM AIR switch OPEN/
CLOSE - Manually modulates the ram air door and regulates the amount
of ram air supplied to the cabin and eiectronlcs bay afler the
AIR SOURCE pushbutton is selected to RAM or OFF,
(Approximately 50 seconds to full open.)
Figure 2-76. Air-Conditioning and Pmsurization Controls and Indicators (Sheet 1 of 2)
2133 ORIGINAL
NAVAIR 01-Fl4AAD-1
NOMENCLATURE I FUNCTfON
I c9 AIR SOURCE selector RAM- Closes the bleed air flow modulator pressure regulator and
pushbuttons shutoff valve, thereby securing the cooling bootstrap turbine
compressor. Inhibits gun firing. The RAM AIR switch is enabled.
Combined ram air and regulated 400°F bleed air are available
to the cockpits and air cooled electronic equipment for
temperature control.When either BOTH ENG, L ENG or R ENG
are selected, the ram alr door automatically closes.
LENG- The left engine is the source of bleed air for the environmental
system and the right engine bleed air shutoff valve is closed.
RENG- The right engine is the source of bleed air for the environmental
system and the left engine bleed air shutoff valve is closed.
BOTH ENG -The right and left engine bleed air shutoff valves are open and
both supply bleed air to the environmental control system. This
Is the nomral position. Automatically closes ram air door.
OFF - Both the left and right engine bleed alr shutoff valves and the
dual pressure regulator valve are closed. Inhibits gun firing.
Pressurization and air conditioning are not available. Enables
the RAM AIR switch.
@ TEMP thumbwheel controt Selects cockpit and suit air tetTIperatUre. It can be rotated through a 3CxY arc
(0 to 14) with mechanical stops at each end placarded COOL and WARM. A
mldpositlon temperature (7) is approximately 70°F In the automatic mode.
　
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