CleaverBrooks 4WI, Руководство по эксплуатации, обслуживанию и запасным частям

Страница: 17 / 216

750-211 (revised 2009)
Promethean Boilers, Model 4WI Manual 1-3
1.2 — The Boiler
The low emission design, with its various levels of IFGR systems, can affect the selection of the combustion air fan,
motor, burner, and other components. Several different system configurations are available, depending on the
requirements for NOx emissions and the fuels used. All systems use similar primary components, but may have dif-
ferent linkage controls, IFGR damper fan, and motor sizes.
The boiler and related equipment installation are to be in compliance with the standards of the National Board of
Fire Underwriters. Installation should also conform to state and local codes governing such equipment. Prior to
installation, the proper authorities having jurisdiction are to be consulted, permits obtained, etc.
All Promethean boilers in the series comply, when equipped with optional equipment, to Industrial Risk Insurers
(IRI), Factory Mutual (FM), or other insuring underwriters requirements.
1.2 — The Boiler
The Promethean boiler is a packaged firetube boiler of welded steel construction and consists of a pressure vessel,
burner, burner controls, forced draft fan, damper, air pump, refractory, and appropriate boiler trim.
FIGURE 1-4.
Typical Steam Boiler
The horsepower rating of the boiler is indicated by the numbers following the fuel series. For example, CB700-600
indicates a gas-fired 600 hp boiler.
The firetube construction provides some characteristics that differentiate it from other boiler types. Because of its
vessel size, the firetube contains a large amount of water, allowing it to respond to load changes with minimum
variation in steam pressure.