LANCE
II SERVICE
MANUAL
SECTION
XIII
HEATING
AND
VENTILATING
13-1. GENERAL
13-2. DESCRIPTION.
Heat for the cabin is provided
by a hot air heater installed on
the
exhaust
manifold. Fresh air
enters the engine
compartment through
the nose cowling,
passes
to the heater
muff through a flexible hose located
on the left front of the engine. The air
is
then heated and vented into
the cabin area through a valve which
can be controlled from the
instrument panel. When the
valve is completely closed off, the heated
air is vented back into
the
engine compartment. The heater outlets
in the cabin are located between
each set of
seats.
Control for the heater system is located
on the right panel, below the instruments.
The windshield is kept
clear of frost, ice, etc., by a defroster
system which operates from
the heater
muff,
but has
in individual
control.
Fresh air for the cabin interior is
picked up from air inlets in the leading
edge of each
wing at the intersection of the tapered and straight section and passed to outlets located
beside the front and center
set of seats. In addition, an air scoop
located in the leading edge
of
the fin directs air to
individual overhead
vents.
13-3. HEATER MAINTENANCE.
If the exhaust manifold should
become defective,
carbon monoxide fumes may be discharged
into the cabin area, therefore,
it is imperative
that the exhaust manifold be inspected
regularly. The heater muff must be
removed in order
to inspect the manifold assembly. Check the operation of the controls to insure the valve
doors function
properly. When the controls are
in the on position, the door should
be
completely
open to permit full airflow. When the
controls are in the off position, the valves
should close off all air passage
and vent the air into the engine
compartment. Refer to
Figure 13-1 or 13-2
for an illustration of the
heater system.
Issued:
1/3/78
HEATING AND VENTILATING
2J9
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