Boiler manual: • Installation • Start-Up • Maintenance • Parts

Before installing boiler (continued)

Combustion and ventilation air openings

 

Figure 3 Combustion and ventilation air openings

 

— Boiler room below grade

Adequate combustion and ventilation air must be provided to assure proper combustion and prevent possibility of flue gas leakage and carbon monoxide emissions, causing severe personal injury or death.

Do not install an exhaust fan in boiler room. Incor- rect burner operation can result.

When combustion and ventilation air enters through side wall openings, ensure that the open- ings comply with the requirements of Figure 3 and Figure 4.

Opening sizes must comply with state, provincial or local codes. In the absence of local requirements, use the National Fuel Gas Code, ANSI/NFPA 54). The following information is taken from ANSI/NFPA 54. For details and information not addressed below, refer to the standard.

Combustion air openings to inside

Required volume of interior spaces

ANSI/NFPA 54 allows combustion air to be supplied through openings to interior spaces if the volume of the connected interior spaces meets the minimum volume required by the standard.

The minimum volume of interior spaces can be taken as 50 cubic feet per 1,000 Btuh of all appliances in the spaces, or the minimum volume can be calculated using the formulas given in ANSI/NFPA 54. Excep- tion: If the air infiltration rate for the spaces is known to be less than

0.40air changes per hour, the minimum volume must be calculated as specified in the standard.

Inside air opening sizes and locations

For spaces that provide the minimum volume required by ANSI/ NFPA 54, the air openings must be sized per the following:

Combining spaces on the same story — Each opening shall have a minimum free area of 1 in2/1000 Btuh (2200 mm2/kW) of the total input rating of all appliances in the space but not less than 100 in2 (0.06 m2). One opening shall commence within 12 inches (300 mm) of the top, and one opening shall commence within 12 inches (300

mm)of the bottom, of the enclosure. The minimum dimension of air openings shall be not less than 3 inches (80 mm).

Combining spaces in different stories — The volumes of spaces in different stories shall be considered as communicating spaces where such spaces are connected by one or more openings in doors or floors having a total minimum free area of 2 in2/1000 Btuh (4400 mm2/kW) of total input rating of all appliances.

Part No. 550-100-068/0308

Figure 4 Combustion and ventilation air openings

—Boiler room partially or completely above grade

Combustion air openings to outside

Outdoor combustion air can be taken through per- manent openings (TWO or ONE), as described in the following. The minimum dimension of air openings shall not be less than 3 inches (80 mm).

Outside openings: TWO permanent openings method

Two permanent openings, one commencing within 12 inches (300 mm) of the top and one commencing within 12 inches (300 mm) of the bottom of the enclo- sure shall be provided. The openings shall communicate directly, or by ducts, with the outdoors or spaces that

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Weil-McLain 88 manual Combustion and ventilation air openings, Combustion air openings to inside
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88 specifications

The Weil-McLain 88 series is a commercial cast iron boiler recognized for its durability, efficiency, and versatile design, making it a preferred choice for various heating applications. Designed primarily for commercial and industrial use, the Weil-McLain 88 combines advanced technology with proven engineering principles to deliver reliable performance and long-lasting service.

One of the standout features of the Weil-McLain 88 is its cast iron construction. Cast iron is renowned for its ability to retain heat, resulting in lower fuel consumption and more consistent heating. This robust material ensures that the boiler can withstand high temperatures and pressures, making it suitable for heavy-duty applications. The sectional design of the boiler allows for easy installation and maintenance, enabling quick access to components and minimizing downtime.

In terms of efficiency, the Weil-McLain 88 is designed to achieve high thermal efficiency ratings. The boiler employs a flue gas recirculation system, which significantly reduces heat loss and maximizes energy utilization. Additionally, its low water content provides rapid heating response times, ensuring that spaces are heated promptly, even during peak demand periods.

Another noteworthy characteristic of the Weil-McLain 88 is its versatility. The boiler can be configured for a variety of applications, including hot water heating, hydronic heating systems, and steam heating. It is compatible with multiple fuel types, including natural gas, propane, and various oil options, allowing for flexibility in fuel choice based on availability and pricing.

The Weil-McLain 88 also incorporates advanced control technologies that enhance operational efficiency. The integrated electronic controls feature diagnostic capabilities to streamline troubleshooting and maintenance, ensuring optimal performance throughout the boiler’s lifespan. Moreover, the boiler's design is compatible with modern building management systems, allowing for seamless integration into existing heating setups.

Overall, the Weil-McLain 88 series stands out for its combination of quality construction, efficient operation, and adaptability to different heating needs. Whether for a commercial building, industrial facility, or institutional application, the Weil-McLain 88 provides a reliable and efficient heating solution that meets the demands of the modern world.
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