Figure 1-8.—Deice boot system.
When the deice system is operating and
When the solenoid is de-energized, air from
one of the solenoids is energized by an
electrical signal from the electronic timer,
it causes the distributor valve servo controlled
by that solenoid to change the inlet to the
boots from suction to pressure. The boot
tubes served by that outlet will inflate for
the predetermined time interval controlled by the
timer.
the boot tubes flow through an-integral check
valve in the distributor valve and out the exhaust
port until the pressure drops to approximately
1 in. Hg. At this time the boot is again
ported to the suction manifold, through the
distributor valve, and any remaining air is
evacuated, fully collapsing the boot tubes, as
shown in figure 1-7.
1-9
