15-16-800 Fire pump requirements.

   Pumps shall be of a centrifugal type. Pumps and auxiliary equipment, including controllers, required to form complete pumping units shall be of a type designed and developed for fire protection service and listed by a product testing laboratory which regularly tests fire protection equipment and conducts periodic inspection of the production of listed equipment. Pumps and controllers shall be plainly marked to show the manufacturer, model designation, pump capacity and pressure, and controller electrical rating.

   Where pumps or controllers are provided to service more than one area or zone, pumps and controllers shall be identified as to the area or zone served by permanent signs.

   Each pump shall be installed in accordance with N.F.P.A. Standard 20, Standard for the Installation of Centrifugal Fire Pumps, 1993 Edition except as herein modified.

(Prior code §  91-61; Amend Coun. J. 10-30-96, p. 31261, § 1)

15-16-810 Pumps supplied from city main.

   If the supply is taken from a city main, the pumping unit shall be designed to develop its full capacity at its rated pressure; provided, however, that if it is the source of supply for an upper standpipe system in a building having multiple systems, it may take its suction from the discharge of the fire pump for the system immediately below, but all piping shall be arranged so that pressure from the higher pressure system cannot be delivered to the lower pressure system.

(Prior code §  91-62; Amend Coun. J. 10-30-96, p. 31261, § 1)

15-16-820 Fire pump auxiliary equipment.

   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)

15-16-830 Pressure-control devices.

   All pressure-controlling and pressure-limiting devices installed in connection with a fire pump shall be designed for operation over a minimum range of zero to 300 pounds per square inch.

(Prior code §  91-64)

15-16-840 Pump suction piping.

   The suction pipe size to a fire pump shall be six inches for 500 and 750 gallons per minute pumps and eight inches for 1,000 and 1,500 gallons per minute pumps. This pipe shall be directly connected to the city main or suction source free from any meter (except a detector meter installed in a bypass around a check valve). The city connection shall be increased two inches if used for both domestic consumption and fire protection demands when the domestic service exceeds two inches in diameter.

(Prior code §  91-65; Amend Coun. J. 10-30-96, p. 31261, § 1)

15-16-850 Requirements for auxiliary drive.

   Diesel or natural gas driven electric generators or direct diesel or natural gas fueled engines shall be installed on fire pumps directly serving floors located over 400 feet above grade.

(Prior code §  91-66; Amend Coun. J. 10-30-96, p. 31261, § 1)