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Main Components and Operating Concept
1) Process Air Blower Wheel
6) Blower Motor
C. Combustion Air
2) Electronic Control Unit
7) Glow Pin
E. Exhaust Gas
3) Combustion Air Blower Wheel
8) Heat Exchanger
F. Fresh / Process Air Intake
4) Combustion Chamber
9) Fuel Pump
H. Hot / Process Air Outlet
5) Overheat / Flame Sensor
10) Operating Unit / Controller
D. Fuel Intake
How the PHP-23A Air Heater Works
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The fuel pump delivers fuel to the combustion chamber.
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The combustion air blower delivers air to the combustion chamber.
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A glow pin is used to ignite the fuel-air mixture.
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The heat from the flame is transferred through the heat exchanger while the exhaust
gases are expelled to the exterior of the vehicle.
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The process air blower transfers air from the cabin, over the outside of the heat
exchanger and blows hot air into the cabin.
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The heater automatically maintains the desired set temperature in the cabin by
regulating through multiple heat output modes.
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