09.17.02.04

.04 Monitors and Indicators.

A. For a boiler, a computerized monitoring system shall qualify as a "24-hour computerized monitoring system and automatic controls," in accordance with Business Occupations and Professions Article, Title 6.5, Annotated Code of Maryland, if it meets the requirements of this regulation.

B. For a boiler operating at 30 to 299 horsepower, the system shall monitor and indicate:

(1) Stack flue gas temperature;

(2) Burner status, including "on" and "off" indicators;

(3) Flame safety control status, including "normal" and "flame failure" indicators; and

(4) One of the following, as applicable:

(a) For steam boilers:

(i) Pressure; and

(ii) Water level; or

(b) For hot water boilers, temperature.

C. For a boiler operating at 300 horsepower or more, the system shall monitor, indicate, and record:

(1) Stack flue gas temperature;

(2) Burner status, including "on" and "off" indicators;

(3) Flame safety control status, including "normal" and "flame failure" indicators; and

(4) One of the following, as applicable:

(a) For steam boilers:

(i) Pressure; and

(ii) Water level; or

(b) For hot water boilers:

(i) Pressure; and

(ii) Temperature.