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Pumps shall be designed for automatic starting and stopping. Control shall be by means of a pressure- activated switch having independent high and low calibrated adjustments in the control circuit. The switch shall be responsive to water pressure in the fire protection system. Each controller shall have its own individual pressure sensing line. The pressure sensing line connection for each pump shall be made between that pump's discharge check valve and discharge control valve. There shall be no shutoff valve in the pressure sensing line.
A time delay device set for one minute for each 10 horsepower of motor rating to a maximum of seven minutes continuous operation after each start shall be provided. A separate automatically controlled pressure maintenance pump shall be provided.
(Prior code § 91-63; Amend Coun. J. 10-30-96, p. 31261, § 1)