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3.2 Description of generator functioning
The fuel in CSA GM type generators is extracted from the circular hopper through specific
motorised blades that convey it towards the drop hole in the upper screw.
The rotary valve has the function of interrupting the fuel's continuity between the two
screws, preventing return of eventual flames that might rise back up to the fuel hopper.
The rotation speed of the screw determines the correct feeding of the grid firebox, there-
fore being a significant factor for the correct functioning of the generator.
The fuel present in the grid firebox is burnt with the introduction of primary and secondary
air.
The heat developed inside the combustion chamber is transferred to water filled gaps
through the generator's steel walls.
The hot fumes make an initial turn inside the grid firebox, go through the combustion
chamber of the generator's body, cross the central tube and, by means of the upper door
cavity, pass through the tubes nest up to the ejection in the rear fumes fitting, making four
smoke passes which are the particularity of this type of heat generator.
The optimal combustion control is obtained with suitable regulations of the primary and
secondary air and the fuel ratio, based on the boiler's power. The combustion quality can
be visually checked or using suitable fumes analysers.
The use instructions of the boiler's control board are provided in a file, supplied together
with this use and maintenance manual (
Attachment A or Attachment B
)
WARNING
