Weil-McLain SGO-W SERIES 3 OIL-FIRED NATURAL DRAFT WATER BOILER manual Lay a foundation, if needed

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Before Installing Boiler CONTINUED

Provide air for combustion and ventilation:

Adequate combustion and ventilation air:

•Assures proper combustion.

•Reduces risk of severe personal injury or death from possible flue gas leakage and carbon monoxide emissions.

Do not install exhaust fan in boiler room.

Older buildings with single-pane windows, minimal weather-stripping and no vapor barrier often provide enough natural infiltration and ventilation without dedicated openings.

New construction or remodeled buildings are most often built tighter. Windows and doors are weather-stripped, vapor barriers are used and openings in walls are caulked. As a result, such tight construction is unlikely to allow proper natural air infiltration and ventilation.

Follow state, provincial or local codes when sizing adequate combustion and ventilation air openings. In absence of codes, use the following guidelines when boiler is in a confined room (defined by NFPA 31 as less than 7200 cubic feet per 1 GPH input of all appliances in area. A room 8 ft. high x 33.5 ft. x

33.5 ft. is 7200 cu. ft.):

Provide two permanent openings — one within 12 inches of ceiling, one within 12 inches of floor. Minimum height or length dimension of each rectangular opening should be at least 3 inches.

When inside air is used — each opening must freely connect with areas having adequate infiltration from outside. Each opening should be at least 140 sq. in. per 1 GPH input (1 sq. in. per 1000 Btu input) of all fuel-burning appliances plus requirements for any equipment that can pull air from room (including clothes dryer and fireplace).

When outside air is used — connect each opening directly or by ducts to the outdoors or to crawl or attic space that freely connects with outdoors. Size per below:

•Through outside wall or vertical ducts — at least 35 sq. in. per 1 GPH input (1 sq. in. per 4000 Btu input) of all fuel-burning appliances plus requirements for any equipment that can pull air from room (including clothes dryer

and fireplace).

•Through horizontal ducts — at least 70 sq. in. per 1 GPH boiler input (1 sq. in. per 2000 Btu input) of all fuel-burning appliances plus requirements for any equipment that can pull air from room (including clothes dryer and fireplace).

•Where ducts are used, they should have same cross-sectional area as free area of openings to which they connect. Compensate for louver, grille or screen blockage when calculating free air openings. Refer to their manufacturer’s instructions for details. If unknown, use:

—Wood louvers, which provide 20-25% free air.

—Metal louvers or grilles, which provide 60-75% free air.

Lock louvers in open position or interlock with equipment to prove open before boiler operation.

Lay a foundation, if needed:

Boiler may be installed on non-carpeted combustible flooring.

For residential garage installation, install boiler so burner is at least 18 inches above floor to avoid contact with gasoline fumes.

A level concrete or masonry foundation is required when:

•Floor could possibly become flooded.

•Non-level conditions exist.

Solid concrete blocks can be used to create a pad.

BOILER FOUNDATION SIZE TABLE

BOILER

LENGTH

WIDTH

MIN.

HEIGHT

MODEL

INCHES

INCHES

INCHES

 

 

 

SGO-3W

17

22

2

SGO-4W

20

22

2

SGO-5W

23

22

2

SGO-6W

26

22

2

SGO-7W

29

22

2

SGO-8W

32

22

2

SGO-9W

35

22

2

 

 

 

 

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Contents This Manual Includes Installation Start-Up Boiler Parts When Calling or Writing About the Boiler Symbol DefinitionsRead This Page First Hazard DefinitionsTable of Contents Installations must comply with Before Installing BoilerBefore selecting boiler location Provide clearances around boiler see FigureProvide air for combustion and ventilation Do not install exhaust fan in boiler roomLay a foundation, if needed Boiler Foundation Size TablePlace boiler Install Non-Packaged BoilerFiberglass wool and ceramic fiber materials Perform hydrostatic pressure test Tankless heater, if usedControl Tapping Table Install jacket sizes 7 through 9 onlyInstall boiler controls Install burner also refer to instructions packed with burner Minimum Chimney Size Table Connect BreechingGeneral chimney requirements Connect Breeching Connect Water Piping Install pipingGeneral piping information Diaphragm expansion tank FigureExpansion Tank Zoning with zone valves Piping Multiple ZonesZoning with circulators Connect Water Piping Hot Water Can Scald Connect Tankless Heater PipingUse with refrigeration systems Tankless Heater Ratings Table To pipe tankless heaterGeneral wiring requirements Connect WiringThermostat wiring Burner wiringConnect Wiring Oil piping connection at burner Connect Oil PipingGeneral oil piping requirements Fill the system Start-UpTips for water systems To place in operationCheck off steps as completed Check-Out ProcedureAppendix Burner adjustments for a boilersDescription Parts ListParts Drawing Dimensions DimensionsIntermediate SGO-W Gold OIL Water Boiler Ratings Ratings

SGO-W SERIES 3 OIL-FIRED NATURAL DRAFT WATER BOILER, 550-141-827/1201 specifications

The Weil-McLain SGO-W Series 3 Oil-Fired Natural Draft Water Boiler is a robust and efficient solution designed for residential heating needs. This boiler stands out for its exceptional construction and advanced engineering, ensuring reliability and longevity for homeowners.

One of the core features of the SGO-W Series 3 is its cast iron heat exchanger, which provides excellent thermal efficiency. The boiler is designed to retain heat for extended periods, allowing for reduced energy consumption and lower heating bills. The heavy-duty cast iron sections are built to withstand high pressures and temperatures, ensuring durability in various conditions.

The SGO-W Series 3 is equipped with a natural draft design, allowing it to utilize the natural upwards movement of flue gases. This design eliminates the need for complicated power venting systems, making installation simpler and more cost-effective. It also enhances the boiler's efficiency by promoting better combustion processes in the burner.

Another significant characteristic is its versatile fuel options. The SGO-W Series 3 accommodates No. 2 fuel oil, making it a viable option for users who prefer or require oil heating. This versatility is crucial for homeowners in areas where natural gas is not available or preferred.

The boiler operates at a high efficiency rate, contributing to lower emissions and compliance with environmental standards. Its energy-efficient design not only benefits the environment but also allows for significant savings over time. The unit is also equipped with a reliable and easily adjustable fuel burner, providing flexibility in managing heating output to suit various residential heating demands.

For safety and convenience, the Weil-McLain SGO-W Series 3 features an electronic ignition system that ensures reliable starting and operation, even in adverse weather conditions. Additionally, the boiler is designed for easy serviceability, with accessible components allowing for quick maintenance and repairs, ensuring that homeowners can rely on continual performance and minimal downtime.

In summary, the Weil-McLain SGO-W Series 3 Oil-Fired Natural Draft Water Boiler is a powerful and efficient heating solution, combining advanced technologies with robust construction. Its cast iron heat exchanger, natural draft design, fuel flexibility, high efficiency, and convenient features make it an excellent choice for residential heating applications, supporting homeowners' comfort and reducing energy costs.
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