N.Y.C. Admin. Code § MC 1007: Section MC 1007: Boiler Low-Water Cutoff

1007.1 General.

Steam and hot water boilers shall be protected with dual low-water cutoff control, with each control independently piped to the pressure vessel in accordance with ASME CSD-1. For hydronic boilers, the low-water cut out may be located in the supply piping above the boiler before any intervening valve. A flow-sensing control installed in accordance with ASME CSD-1 shall be considered a low-water cutoff for the purposes of this section.

Exception: Hot water boilers located within a dwelling unit supplying only that unit and having a total heat input of less than 400,000 Btu/h (117.2 kW) may be protected by only one low-water cutoff control.

1007.2 Operation.

Low-water cutoff controls and flow-sensing controls required by Section 1007.1 shall automatically stop the combustion operation of the appliance when the water level drops below the lowest safe water level as established by the manufacturer and in accordance with ASME CSD-1, or when water circulation stops, respectively.

1007.3 Low-water cut out maintenance and testing.

Low-water cut outs shall be maintained in accordance with ASME CSD-1 and the manufacturer's specifications. An operator shall test low-water cut outs as follows: (1) high pressure steam boilers every shift, (2) low pressure steam boilers daily and (3) hot water boilers monthly. Slow drain tests shall be conducted for steam boilers every six months. Every year, low-water cut outs and associated piping for steam boilers shall be opened, cleaned and inspected. Records of all testing, cleaning, and inspection required by this section shall be maintained, and made available to the department upon request.