CHAPTER 21
PAGE 3
PAGE DATE: 7. July 2010
MAINTENANCE MANUAL EXTRA 300LT
21-40-00 HEATING
The 300LT is equipped with a cabin heating system, which
allows feeding the front and rear cockpit independently with
warm air. The system uses fresh outside air, which is heated
up by the engine exhaust muffler. The system is controlled by
two handles in the rear cockpit.
On the left front engine baffle a 3” air intake (1, figure 1) with
screen is positioned. From there fresh air is routed through
a 3" ducting (2) to the exhaust muffler heat shroud (3), where
it is heated up. An inlet box (4) is placed on the engine side
of the firewall. Using the main handle (9) the warm air can
there be guided into the cockpit or dumped overboard. A
distribution box (5) is located on the aft side of the firewall.
Using the distribution handle (8) the ratio of warm air supply
between front and rear can be controlled. Turning the handles
to the right as far as they will go fixes the Bowden cables. The
distribution box incorporates the warm air dispensers for the
front occupant as well as the flange for the 2" ducting (6) to
the air outlets (7) at the pilot’s feet.
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