Section R20-5-412. Automatic Low-water Fuel Cutoff Devices or Combined Water Feeding and Fuel Cutoff Devices

A.      An owner, user, or operator shall ensure that low-water fuel cutoff devices or combined water feeding and fuel cutoff devices do not interfere with an operator’s or inspector’s abil- ity to safely clean, repair, or inspect a boiler or lined hot water heater.

B.       A low-water fuel cutoff device shall have a pressure rating not less than the set pressure of the safety valve or safety relief valve.

C.      In addition to the requirements of subsections (A) and (B), all low-water fuel cutoffs and flow sensing devices shall be con- structed and installed in accordance with applicable ASME Code and standards for boilers and steam jacked kettles in R20-5-404(A).

Historical Note

Repealed effective April 12, 1979 (Supp. 79-2). New

Section adopted effective April 9, 1992 (Supp. 92-2). R20-5-412 recodified from R4-13-412 (Supp. 95-1). Amended effective October 9, 1998 (98-4). Amended by

final rulemaking at 15 A.A.R. 1496, effective August 18,

2009 (Supp. 09-3).