Minn. R. agency 151, ch. 5225, INSPECTIONS, pt. 5225.2500

Current through Register Vol. 49, No. 29, 2025

Part 5225.2500 - LOW WATER DEVICES

Subpart 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 [Repealed, 13 SR 1917]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 [Repealed, 13 SR 1917]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; and

B. 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; and

B. 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.

Minn. R. agency 151, ch. 5225, INSPECTIONS, pt. 5225.2500

13 SR 1917; L 2007 c 140 art 9 s 27; art 13 s 4

Statutory Authority: MS s 175.171; 183.44; 183.465; 183.466; 326B.964; 326B.966