T-45A UJPT, E2-C2, ADV, & IUT Eng-17
ECS/Pressurization System & OBOGS
III. ECS controls, switches and indicators 1.4.15.3
Sg 3, fr 1
Lesson Organization
A.
Air conditioning system
1.
Air conditioning control panel (fwd cockpit
Sg 3, fr 2
only)
a.
Cockpit air conditioning (flow) knob
(1) OFF: energizes solenoid to close
main pressure regulating and
shutoff valve (MPRSOV). Ram air
ventilation is automatically
AIR CONDITIONING
activated (RAM air inlet and outlet
CONTROL PANEL
valves are open)
Overlay 1
(2) NORMAL: opens MPRSOV and
Air Conditioning (Flow) Knob
IPRSOV (if landing gear extended)
to provide air conditioning and
pressurization by directing
approximately 60% of the airflow
to the crew ventilation ducts and
40% to defog ducts
(3) DEFOG: Diverts approximately
60% of the airflow to the
windshield and canopy defog
ducts and 40% to crew ventilation
ducts
(4) MAX DEFOG: Opens max defog
valve to allow additional supply of
hot air mixing with cold airflow
b.
Cockpit temperature control knob
Overlay 2
Cockpit Temperature Control Knob
(1) AUTO: cockpit temperature
automatically controlled by
positioning the knob toward COOL
or WARM position to maintain
desired cockpit temperature
setting
(8-03) Original
Page 17-9
Previous Page
