Weil-McLain 550-141-827/1201 manual Connect Wiring, General wiring requirements, Thermostat wiring

Page 18

Connect Wiring

General wiring requirements:

Electric shock hazard. Can cause severe personal injury or death if

power source, including service switch on boiler, is not disconnected before installing or servicing.

Installations must follow these codes:

National Electrical Code, ANSI/NFPA 70, latest edition and any additional national, state or local codes.

In Canada, CSA C22.1 Canadian Electrical Code Part 1 and any local codes.

Wiring must be N.E.C. Class 1. If original wire as supplied with boiler must be replaced, type 105°C wire or equivalent must be used. Supply wiring to boiler and additional control wiring must be 14 ga. or heavier.

Provide electrical ground at boiler as required by codes.

Thermostat wiring:

Install thermostat on inside wall away from influences of drafts, hot or cold water pipes, lighting fixtures, television, sun rays or fireplaces.

Follow instructions with thermostat. If it has a heat anticipator, set heat anticipator in thermostat to match power requirements of equipment connected to it. Boiler wiring diagrams give setting for standard equipment.

Junction box (furnished):

Junction box houses electrical connections for all boiler components.

“A” boilers are furnished with burner and limit harnesses.

All field-provided high voltage wiring must be sheathed in flexible metal conduit.

Connect incoming line voltage “HOT” wire to service switch and neutral wire to white wire. Field-install equipment ground wire to green wire with wire nut.

Service switch (15 amp) is provided with boiler. “A” boilers — install switch as shown.

Some local codes may require an emergency shut-off switch installed at a location away from boiler. Follow local codes.

Burner wiring:

Burner harness incorporates a disconnect plug, providing a convenient way to disconnect wiring when burner mounting door is opened.

On “A” boilers, mount the plug (provided in water trim carton) on the burner housing as shown in FIGURE 15. For Carlin burners, screw burner plug into threaded conduit coupling, then mount this assembly to the burner housing using the chase nipple. Route wires through housing and make connections in burner junction box as shown in boiler wiring diagram.

Tankless Heater Control

 

 

 

 

Circulator Wiring Harness

 

 

 

 

(Not Furnished on A Boilers)

Wiring Harness

 

 

 

 

 

 

 

 

 

(Furnished as part of tankless

 

 

 

 

 

heater kit as additional

 

 

 

 

Limit Wiring Harness

equipment from W-M)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Burner Wiring Harness

Burner Disconnect Plug

Boiler Wiring for Forced Hot Water

FIGURE 15

18

Image 18
Contents This Manual Includes Installation Start-Up Boiler Parts Read This Page First Symbol DefinitionsWhen Calling or Writing About the Boiler Hazard DefinitionsTable of Contents Before selecting boiler location Before Installing BoilerInstallations must comply with Provide clearances around boiler see FigureLay a foundation, if needed Do not install exhaust fan in boiler roomProvide air for combustion and ventilation Boiler Foundation Size TableInstall Non-Packaged Boiler Fiberglass wool and ceramic fiber materialsPlace boiler Tankless heater, if used Perform hydrostatic pressure testInstall jacket sizes 7 through 9 only Install boiler controlsControl Tapping Table Install burner also refer to instructions packed with burner Connect Breeching General chimney requirementsMinimum Chimney Size Table Connect Breeching General piping information Install pipingConnect Water Piping Diaphragm expansion tank FigureExpansion Tank Piping Multiple Zones Zoning with circulatorsZoning with zone valves Connect Water Piping Connect Tankless Heater Piping Use with refrigeration systemsHot Water Can Scald To pipe tankless heater Tankless Heater Ratings TableThermostat wiring Connect WiringGeneral wiring requirements Burner wiringConnect Wiring Connect Oil Piping General oil piping requirementsOil piping connection at burner Tips for water systems Start-UpFill the system To place in operationCheck-Out Procedure Check off steps as completedBurner adjustments for a boilers AppendixParts List DescriptionParts Drawing Dimensions DimensionsIntermediate Ratings SGO-W Gold OIL Water Boiler 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.