Weil-McLain 550-141-826/1201 Connect Water Piping, General piping information, Install piping

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Connect Water Piping

General piping information:

•If installation is to comply with ASME or Canadian requirements, an additional high temperature limit is needed. Install control in supply piping between boiler and isolation valve. Set control to a minimum of 20°F above set point of combination control. Maximum allowable set point is 220°F. Wire control as shown on wiring diagram.

•Use a low water cutoff device when:

—Boiler is installed above radiation level.

—Required by certain state or local codes or insurance companies.

Use low water cutoff designed for water installations. Probe-type is recommended. Purchase and install in tee in supply line above boiler.

•Use backflow check valve in cold water supply as required by local codes.

Install piping:

•See FIGURE 8 or 9 on page 15 and Water Piping Size Table at right for near-boiler piping and single-zone piping. See page 16 to complete multiple-zone piping or page 17 to complete piping for systems operating below 140°F.

For multiple-boiler piping, refer to Weil-McLain’s “Primary/Secondary Piping Guide” and “M-WGO Multiple Boiler Manual.”

•Install relief valve vertically in “R1” tapping on front of boiler. See FIGURE 8 or 9 and also refer to tag attached to relief valve for manufacturer’s instructions.

Pipe relief valve discharge line near floor close to floor drain to

eliminate potential of severe burns. Do not pipe to any area where freezing could occur. Do not plug, valve or place any obstruction in discharge line.

DIAPHRAGM expansion tank (FIGURE 8):

•Make sure expansion tank size will handle boiler and system water volume and temperature. Tank must be located near boiler before inlet to circulator. See tank manufacturer’s instructions for details.

Undersized expansion tanks cause system water to be lost

from relief valve and makeup water added through fill valve. Eventual section failure can result.

•Install automatic air vent in “N” tapping as shown in FIGURE 8.

CLOSED expansion tank (FIGURE 9):

•Ensure expansion tank size will handle boiler and system water volume and temperature.

Undersized expansion tanks cause system water to be lost from relief

valve and makeup water added through fill valve. Eventual section failure can result.

•Connect tank from “N” tapping shown in FIGURE 9 to expansion tank. Use ½" N.P.T. piping. Pitch any horizontal piping up towards tank 1 inch per 5 feet of piping.

WATER PIPING SIZE TABLE *

BOILER

 

 

MODEL

TO

FROM

NUMBER

SYSTEM

SYSTEM

 

 

 

WGO-2

1"

1"

 

 

 

WGO-3

1¼"

1¼"

 

 

 

WGO-4

1¼"

1¼"

 

 

 

WGO-5

1½"

1½"

 

 

 

WGO-6

1½"

1½"

 

 

 

WGO-7

1½"

1½"

 

 

 

WGO-8

2"

2"

 

 

 

WGO-9

2"

2"

 

 

 

*All piping sizes based on 20°F temperature rise through boiler.

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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 FigureBoiler Foundation Size Table Provide air for combustion and ventilationLay a foundation, if needed Perform hydrostatic pressure test Install Packaged BoilerPlace boiler Go to page 12 to connect breeching and ventingChange From Back Flue Outlet to Top Flue Outlet Optional Install Non-Packaged Boiler Fiberglass wool and ceramic fiber materialsFlue Collector Hood Install boiler controls Install Packaged and Non-Packaged BoilerInstall jacket sizes 7 through 9 only Control Tapping TableInstall burner also refer to instructions packed with burner Minimum Chimney Size Table Connect BreechingGeneral chimney requirements Connect Breeching General piping information Install pipingConnect Water Piping Diaphragm expansion tank FigureIsolation Piping Multiple Zones Zoning with circulatorsPiping for systems requiring temperatures below 140F Use with refrigeration systems Thermostat wiring Connect WiringGeneral wiring requirements Burner wiringConnect Wiring Connect Wiring Oil piping connection at burner Connect Oil PipingGeneral oil piping requirements Tips for water systems Start-UpFill the system To place in operationCheck-Out Procedure Check off steps as completedBurner adjustments for P and a boilers AppendixClose clearance installation Dimension a Parts List DescriptionParts Drawing Dimensions DimensionsIntermediate DIA Ratings WGO Gold OIL Water Boiler Ratings

550-141-826/1201 specifications

The Weil-McLain 550-141-826/1201 is a high-efficiency boiler designed for commercial applications, providing unmatched performance, reliability, and advanced technology features. This model is specifically engineered to cater to a range of heating needs, making it suitable for various settings, such as schools, hospitals, and large commercial spaces.

One of the key features of the Weil-McLain 550-141-826/1201 is its impressive thermal efficiency. With a high AFUE (Annual Fuel Utilization Efficiency) rating, this boiler maximizes energy usage, resulting in lower utility costs for end-users. The efficient performance not only translates to better energy savings but also contributes to a reduced carbon footprint, aligning with modern sustainability goals.

The powerful burner technology incorporated in the Weil-McLain 550-141-826/1201 ensures precise control over the combustion process. This results in consistent heating performance and minimizes emissions, meeting stringent environmental regulations. The unit utilizes advanced modulation technology, which allows the burner to adjust its output according to the demand, providing significant energy savings and enhanced comfort.

Another standout characteristic of this boiler is its robust construction. Built with high-quality materials, the Weil-McLain 550-141-826/1201 is designed to endure demanding conditions, ensuring longevity and reduced maintenance needs. The boiler features a durable heat exchanger, which optimizes thermal transfer efficiency while resisting corrosion and thermal stress.

The user-friendly controls and monitoring systems enhance the operational experience, allowing for easy adjustments and status checks. The integrated diagnostic capabilities provide valuable insights for troubleshooting, making maintenance straightforward and reducing downtime.

Furthermore, the versatility of the Weil-McLain 550-141-826/1201 allows for multiple installation configurations, accommodating different system requirements and space limitations. Its compact design makes it an ideal choice for facilities where space is a premium.

In summary, the Weil-McLain 550-141-826/1201 stands out in the commercial boiler market with its high efficiency, innovative burner technology, robust construction, user-friendly controls, and versatile installation options. This model exemplifies Weil-McLain's commitment to energy-efficient heating solutions, setting a benchmark for performance and reliability in the industry.
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