2900 Selma Highway, Montgomery AL 36108 USA
PH: +1.334.386.5400 (option 2) FAX: +1.334.386.5450 WEB: www.hartzell.aero
Page | 10
MM10001
Dated 1/1/08
Rev L dated 5/21/15
4. DESCRIPTION
Each heater system generally consists of a combustion chamber assembly, a ventilation air blower, a
combustion air blower, nozzle holder, solenoid valve assembly, spark plug, high-voltage ignition
system, combustion air pressure switch, overheat switch and cycling switch. These components are
combined in a complete assembly. Optional equipment includes thermostat, fuel pump, fuel regulator
and remote shut off valve, heater circuit breaker, controls, and operation indicator lights. The optional
equipment items are provided as separate components since they may be mounted remotely in the
aircraft and subject to customer preferences.
Aviation Gasoline Applications may use an electric fuel pump that provides fuel at 7.0 to 9 PSI for
operation. The heater may be operated from the engine fuel pump, provided the fuel pressure output is
controlled within the operating pressure range of the heater and does not adversely affect engine
operation.
Jet Fuel Applications use an electric fuel pump assembly that fuels through a fuel control system
providing fuel pressure at 105 +5.-0 PSI.
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