Section 2 - Engine Identification Page 2-3 CFP83 Series Fire Pump Engines Cummins’ complete line of fire pump engines have been approved as packaged units (engine and all accessories) by Factory Mutual Research and listed by Underwriter’s Laboratories, Inc. and Underwriter’s Laboratories of Canada. Because of the lengthy and expensive process to design and produce a fire pump engine that meets these requirements, no deviations are permitted without approval. These engines are to be used only for fire protection applications.
Overspeed Switches Each engine is equipped with an overspeed switch which will activate the fuel pump solenoid valve and shut off the engine when the RPM exceeds a present limit. The overspeed switch senses engine speed during the start cycle and stops the starting motor cranking cycle. The overspeed switch must be adjusted to the required speed limit during the in-service inspection. Operating Speed All Cummins fire pump engines are shipped from the factory with the operating speed adjusted to the lowest approved operating speed.
Final operating speed adjustment must be made at the time of the in-service inspection to obtain the required fire pump operating speed specified by the pump manufacturer. Control System The function of a fire pump controller is to start the engine. These controllers are more sophisticated than standard industrial controllers because they include special items for fire pumps. Several options are available: The automatic start controller can be used for either automatic or manual stop after the fire demand signal is removed. Pressure recorders are available to provide a permanent record of water pressure fluctuations and engine starts.
Sequential starting is available for multiple-pump installations to keep all pumps from starting simultaneously. NOTE : Fire pump controllers are not supplied by Cummins Fire Power, or Cummins Engine Company, Inc. Drawing No. 9777, Section 2, Rev. 02-07