Proheat M80 - Manual (Page 22)

PROHEAT G-I PCM SERVICE MANUAL 2-1
PRINCIPLE OF
OPERATION
COMPONENT DESCRIPTIONS
Impeller-style blower driven by the Motor provides the principle combustion air.
Drives the Combustion Air Blower, Air Compressor and Fuel Supply Pump.
A positive displacement, gear-type pump that draws fuel from the vehicle fuel
tank and supplies it to the Fuel Regulator. Pressure is regulated between
7 – 10 PSI by means of an internal relief valve. Fuel is re-circulated within the
pump, therefore a fuel return line to the tank is not required.
Diaphragm-type pressure reducing valve. The Fuel Regulator drops the fuel
supply pressure to atmospheric pressure (0 PSI).
Air-aspirating type burner nozzle. Compressed air flows through the air
passages, exiting the nozzle in front of the fuel orifice creating a vacuum in
the fuel supply. This draws fuel from the Fuel Regulator and the combined
fuel/air mixture is atomized into the combustion chamber.
Electrically operated solenoid valve which controls fuel flow to the Fuel Nozzle.
Diaphragm compressor that supplies air pressure to the Fuel Nozzle. Note that
older versions of M-Series use a rotary vane compressor. Refer to page D-1 for
more information.
Regulates air pressure to the fuel nozzle.
For use with Rotary Vane Compressor ONLY Serial Numbers 600000 – 699999.
Electronic Ignition Module with plug-in electrode.
Electronic control module monitors the PROHEAT sensors, operating conditions,
and controls the Motor and other devices. Diagnostics are utilized for both
safety in operations and detection of component faults to aid in service and
troubleshooting. The G-I PCM contains the flame sensor which senses the flame
intensity. This information can be retrieved by a personal computer using
PROHEAT Datalink software.
Directs the air supplied by the blower through a swirler into the combustion
zone, mixing it with the atomized fuel/air mixture from the Fuel Nozzle.
2.0
2.1
Combustion Air Blower:
Motor:
Fuel Supply Pump:
Ignition Module:
G-I PCM:
(PROHEAT Control Module)
Fuel Regulator:
Air Compressor:
Air Relief:
Fuel Shut-off Valve:
Fuel Nozzle:
Combustion Tube: