Weil-McLain 88 Combustion air combination indoor and outdoor openings, Engineered Installations

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Weil-McLain 88 Water and steam boilers — Series 2 — for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Before installing boiler (continued)

freely communicate with the outdoors, as follows:

•Where directly communicating with the outdoors or where communicating to the outdoors through vertical ducts, each opening shall have a minimum free area of 1 in2/4000 Btuh (550 mm2/kW) of total input rating of all appliances in the enclosure.

•Where communicating with the outdoors through horizon- tal ducts, each opening shall have a minimum free area of 1 in2/2000 Btuh (1100 mm2/kW) of total input rating of all appliances in the enclosure.

Outside openings: ONE permanent opening method

One permanent opening, commencing within 12 inches (300 mm) of the top of the enclosure, shall be provided. The appliance shall have clearances of at least 1 in. (25 mm) from the sides and back and 6 inches (150 mm) from the front of the appliance. The opening shall directly communicate with the outdoors or shall communicate through a vertical or horizontal duct to the outdoors or spaces that freely communicate with the outdoors and shall have a minimum free area of the following:

(1)1 in2/3000 Btu/hr (700 mm2 per kW) of the total input rating of all appliances located in the enclosure, and . . .

(2)Not less than the sum of the areas of all vent connectors in the space.

Combustion air — combination indoor and outdoor openings

ANSI/NFPA 54 allows combustion air to be taken from a combination of openings to outside and to interior spaces. Follow all requirements of the standard to determine the minimum volume of interior spaces and to calculate minimum sizes of openings.

system, the combustion air shall be supplied from outdoors at the minimum rate of 0.35 ft3/minute per 1000 Btuh (0.034 m3/min per kW) for all appliances located within the space.

•Where exhaust fans are installed in the building, additional air shall be provided to replace the exhausted air.

•Each of the appliances served shall be inter- locked to the mechanical air supply system to prevent main burner operation where the me- chanical air supply system is not in operation.

•Where combustion air is provided by the build- ing’s mechanical ventilation system, the system shall provide the specified combustion air rate in addition to the required ventilation air.

Louvers, Grilles, and Screens.

The required size of openings for combustion, venti- lation, and dilution air shall be based on the net free area of each opening.

Where the free area through a design of louver or grille or screen is known, it shall be used in calculating the size opening required to provide the free area specified.

Where the louver and grille design and free area are not known, it shall be assumed that wood louvers will have 25 percent free area, and metal louvers and grilles will have 75 percent free area.

Non-motorized louvers and grilles shall be fixed in the open position.

Minimum screen mesh size

Screens shall not be smaller than ¼ inch mesh.

Engineered Installations

Engineered combustion air installations shall provide an adequate sup- ply of combustion, ventilation, and dilution air and shall he approved by the authority having jurisdiction.

Mechanical Combustion Air Supply

Where all combustion air is provided by a mechanical air supply

Motorized louvers

Motorized louvers shall be interlocked with the appli- ance so they are proven in the full open position prior to main burner ignition and during main burner opera- tion. Means shall be proved to prevent the main burner from igniting should the louver fail to open during burner startup, and to shut down the main burner if the louvers close during burner operation.

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Part No. 550-100-068/0308

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Contents Boiler Manual Read before proceeding Hazard DefinitionsRead before proceeding Contents Before selecting boiler location Before installing boilerInstallation must comply with Provide clearance around boilerCombustion air openings to inside Required volume of interior spacesCombustion and ventilation air openings Combustion air openings to outsideLouvers, Grilles, and Screens Engineered InstallationsCombustion air combination indoor and outdoor openings Mechanical Combustion Air SupplyFor block assembly Set boiler in placeFor packaged boiler Assembling the block Prepare and position back sectionInstall intermediate sections If using tankless heater TI sectionsBoiler model Section arrangementNumber Perform hydrostatic pressure test Prepare boiler and testSteam boiler Between 45 and 55 psig Complete block assembly Install burner mounting plate on front sectionInsert HXT-bars Install cleanout plates Install draft hood collarInstall piping Connect water boiler pipingGeneral water piping information Piping multiple boilers By-pass circulator sizingConnect steam boiler piping General steam piping informationMinimum height of header above water line must be 24 inches Steam boiler piping guidelinesDrawing legend & notes Hartford loop piping for all steam boilersModel 1288 through 1888 steam 3 or 4 risers required Multiple Steam Boiler Piping Gravity Condensate Return Install support brackets/channels Install jacketBefore installing jacket Remove jacket parts from cartonsInstall jacket Install jacket top panels Install jacket front and back panelsInstall jacket side panels Install jacket trimJacket side panel placement Jacket top panel placement Pipe tankless heaters To pipe tankless heatersHot water can scald Install water boiler controls Install controlsInstall steam boiler controls Steam control locationsSteam control siphon and fittings Select type of venting system Connect breeching and venting systemsGeneral venting information Construct metal breechingStub vent forced draft single boiler Install burner & wiring and fill system Install fuel piping Fuel oil pipingGas piping Flue gas temperature no lower than 330F Make final adjustmentsAdjust burner and damper assembly Skim steam boilersRemoval of Front Plate or Cleanout Plate Materials Handling ceramic fiber and fiberglass materialsRatings =B=RModel Supply & return tappings Burner lengths Dimension F DimensionsDimensions inches Model 1788 1888Dimensions see lettered dimensions on opposite Parts Description Part numberParts Warranty Weil-McLain Limited Warranties

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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