Current through Register Vol. 48, No. 51, June 17, 2024
Part 5225.2500 - LOW WATER DEVICESSubpart 1. [Repealed, 13 SR 1917]Subp. 2. [Repealed, 13 SR 1917]Subp. 3.Requirements.The following must be equipped with a low water cutout that will shut off the fuel supply in case of a low water condition:
A. each automatically fired steam boiler; andB. each automatically fired hot water heating boiler or other hot liquid boiler plants of two or more boilers with individual isolating valves connected to a common header with a total heat input exceeding 750,000 Btu per hour input.Subp. 4.Flow-sensing device required.The following must have a flow-sensing device installed in the outlet piping instead of the low water fuel cutoff required in subpart 3 to automatically cut off the fuel supply when the circulating flow is interrupted:
A. a coil type boiler plant exceeding 750,000 Btu; andB. a watertube boiler plant with heat input greater than 750,000 Btu per hour requiring forced circulation to prevent overheating of the coils or tubes.13 SR 1917; L 2007 c 140 art 9 s 27; art 13 s 4Statutory Authority: MS s 175.171; 183.44; 183.465; 183.466; 326B.964; 326B.966