A diesel engine fire pump can be a good choice for a standby system in buildings where emergency power is required and the space for a larger generator set is not available. However, these systems are a lot more complicated to install and require a much larger enclosure size than an electric driver due to the storage of fuel, batteries, and other components. Also, the exhaust from these engines can cause a significant amount of pollution to the building.

If your fire pump system uses a diesel engine, you should be sure to perform the following inspections on a weekly basis. First, verify that the fire pump controllers selector switch is in the auto position. Next, verify that the battery chargers in the fire pump controller are operating. Finally, check that the engine block heater and low fuel alarm switches are in working order.

NFPA 20 requires that the diesel fuel tank be sized to hold one gallon of fuel per engine horsepower plus five percent for expansion. A dike must be provided underneath the fuel tank to contain any potential spills. Ensure that the fuel tanks vents and fill piping are clear of any obstructions.

In addition to these items, a diesel fire pump should be cycled on a weekly basis. During this cycle, the pumps should be run for thirty minutes to bring them up to full speed, pressure, and temperature. Then, the fuel tank should be refilled to maintain a two-thirds full status. At the same time, the voltage and charging current readings should be taken on each battery. diesel engine fire pump