Weil-McLain Comprehensive Guide to Weil McLain Boiler Installation, Wiring Diagrams, and Maintenance
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Boiler manual: • Installation • Start-Up • Maintenance • Parts

Install burner & wiring and fill system

To install burner

1.Unpack burner.

2.Place gasket around air tube and against burner mounting flange. If sealing rope is used, apply 1/8" continuous bead of rope adhesive around burner mounting flange and apply sealing rope to make gas-tight seal.

3.Mount burner into opening in burner mounting plate.

Maintain gas-tight seal between burner mounting flange and plate to prevent damage to air tube.

4.Level burner using burner support brackets where required.

5.Secure with furnished bolts.

6.Retain burner information packet. Keep with boiler.

To wire burner and boiler controls

Electric shock hazard. Can cause severe personal injury or death if power source is not disconnected before installing or servicing boiler and burner.

1.Install all wiring in compliance with:

•National Electrical Code ANSI/NFPA 70.

•Any additional national, state, or local codes.

2.Follow burner manual and wiring diagram found in burner in- formation packet.

3.Use #14 AWG wire for operating and safety circuit wiring.

4.Where burner motor voltage differs from control voltage, supply proper voltage to each. Size fused disconnects and conductors per National Electrical Code ANSI/NFPA 70.

Determine if water treatment is needed (water boilers only)

Do not use petroleum-based cleaning or sealing com- pounds in boiler system. Severe damage to system components can result, causing substantial property damage.

Continual make-up water will reduce boiler life. Minerals can build up in sections, reducing heat transfer, overheating cast iron and causing section failure.

For unusually hard water areas or low pH conditions (less than 7.0) consult local water treatment company. Provide a water softener for make-up water if hardness exceeds 7 grains.

Freeze protection (when used) (water boilers only)

1.Use antifreeze especially made for hydronic systems. Inhibited propylene glycol is recommended.

Do not use automotive, ethylene glycol or undiluted antifreeze. Severe personal injury or death can result.

2.50% solution provides protection to about -30°F.

3.Local codes may require back-flow preventer or actual disconnect from city water supply.

4.Determine quantity according to system water content. Boiler water content is listed in "Ratings," page 35. Percent of solution will affect sizing of heat distribution units, circulator and expansion tank.

5.Follow antifreeze manufacturer's instructions.

To fill water boilers

1.Close manual air vents and drain cocks.

2.Fill to correct system pressure. Correct pressure will vary with each installation.

3.Starting on lowest floor, open air vents one at a time until water squirts out. Close vent. Repeat with remaining vents.

4.Refill boiler to correct pressure.

To fill steam boilers

1.Do not fill (except for leakage test) until boiler is ready to be fired.

2.Fill to normal waterline, halfway up gauge glass.

3.Recommend boiler water pH 7.0 to 8.5.

Part No. 550-100-068/0308

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Contents Boiler Manual Hazard Definitions Read before proceedingRead before proceeding Contents Provide clearance around boiler Before installing boilerInstallation must comply with Before selecting boiler locationCombustion air openings to outside Required volume of interior spacesCombustion and ventilation air openings Combustion air openings to insideMechanical Combustion Air Supply Engineered InstallationsCombustion air combination indoor and outdoor openings Louvers, Grilles, and ScreensSet boiler in place For block assemblyFor packaged boiler Prepare and position back section Assembling the blockIf using tankless heater TI sections Install intermediate sectionsSection arrangement Boiler modelNumber Prepare boiler and test Perform hydrostatic pressure testSteam boiler Between 45 and 55 psig Install burner mounting plate on front section Complete block assemblyInsert HXT-bars Install draft hood collar Install cleanout platesConnect water boiler piping Install pipingGeneral water piping information By-pass circulator sizing Piping multiple boilersGeneral steam piping information Connect steam boiler pipingHartford loop piping for all steam boilers Steam boiler piping guidelinesDrawing legend & notes Minimum height of header above water line must be 24 inchesModel 1288 through 1888 steam 3 or 4 risers required Multiple Steam Boiler Piping Gravity Condensate Return Remove jacket parts from cartons Install jacketBefore installing jacket Install support brackets/channelsInstall jacket Install jacket trim Install jacket front and back panelsInstall jacket side panels Install jacket top panelsJacket side panel placement Jacket top panel placement To pipe tankless heaters Pipe tankless heatersHot water can scald Install controls Install water boiler controlsSteam control locations Install steam boiler controlsSteam control siphon and fittings Construct metal breeching Connect breeching and venting systemsGeneral venting information Select type of venting systemStub vent forced draft single boiler Install burner & wiring and fill system Fuel oil piping Install fuel pipingGas piping Skim steam boilers Make final adjustmentsAdjust burner and damper assembly Flue gas temperature no lower than 330FHandling ceramic fiber and fiberglass materials Removal of Front Plate or Cleanout Plate Materials=B=R Ratings1788 1888 DimensionsDimensions inches Model Model Supply & return tappings Burner lengths Dimension FDimensions see lettered dimensions on opposite Description Part number PartsParts Weil-McLain Limited Warranties Warranty

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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