Connect Breeching

General chimney requirements:

•Designed for natural draft firing. Connect boiler to vertical chimney.

Insufficient draft can cause flue gas leakage and carbon

monoxide emissions, which will lead to severe personal injury or death.

•Use vent material approved by local codes for oil-fired burners. In their absence, refer to:

—NFPA 31, Installation of Oil-Burning Equipment.

—NFPA 211, Standard for Chimneys, Fireplaces, Vents and Solid Fuel Burning Appliances.

—In Canada, refer to CSA B139, Installation Code for Oil-Burning Equipment.

•NFPA 211 requires chimney to be lined before connected to boiler.

Inspect existing chimney before installing new boiler. Failure to

do any of the following will result in severe personal injury or death:

—Clean chimney, including removal of blockage.

—Repair or replace damaged pipe or liner.

—Repair mortar and joints.

To prevent downdrafts, extend chimney at least 3 feet above highest point where it passes through roof and 2 feet higher than any portion of building within 10 feet. Increase chimney cross-sectional area and height at least 4% per 1,000 feet above sea level.

•Minimum clearances from vent pipe to combustible material:

6 inches — Type “L” doublewall vent

18 inches — Singlewall vent

•Minimum chimney sizes should be used.

Oversized chimneys, outside masonry chimneys and/or derated

inputs can result in condensation in chimney.

12

MINIMUM CHIMNEY SIZE TABLE

***MINIMUM

BOILER

MINIMUM

I=B=R

 

MINIMUM

MODEL

BREECHING

CHIMNEY SIZE

CHIMNEY

NUMBER

DIAMETER

RECT.

ROUND

HEIGHT

WGO-2

5"

 

 

 

 

WGO-3

8" x 8"

 

6"

15'

 

 

WGO-4

6"

*

 

 

 

WGO-5

6"

 

 

 

 

WGO-6

7"

8" x 8"

 

7"

15'

WGO-7

*

 

 

 

 

 

 

 

WGO-8

7"

8" x 12"

 

7"

20'

WGO-9

**

 

 

 

 

 

 

 

 

 

 

 

*6¾" x 6¾" inside liner

**6½" x 10½" inside liner

***Flue collar on boiler is 7" diameter

Connect breeching:

Long horizontal breechings, excessive number of tees and

elbows or other obstructions restricting combustion gas flow can result in possibility of condensation, flue gas leakage and carbon monoxide emissions, which can lead to severe personal injury or death.

1.Install 2 flue pipe brackets.

2.Connect full-sized breeching when possible. See Minimum Chimney Size Table.

—Back outlet — see FIGURE 6.

—Top outlet — see FIGURE 7.

3.Connection must be made above bottom of chimney to avoid blockage. Breeching must not enter chimney far enough to cause obstruction. Use thimble or slip joint where breeching enters chimney to allow removal for cleaning.

4.When burner and boiler are properly installed, draft overfire will be approximately -0.01"

to -0.02" W.C. Install barometric control in breeching, per control manufacturer’s instructions, when excess draft needs to be relieved or to comply with applicable codes and regulations. Use draft gauge to adjust proper opening.

5.An induced draft fan for the chimney may be necessary if:

—Excessive resistance to flow of combustion gases can be expected.

—Cross-sectional area of chimney is smaller than minimum recommended.

—Chimney height is less than recommended. Seal all vent joints. Interlock burner with

fan operation.

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Weil-McLain 550-141-826/1201 manual Connect Breeching, General chimney requirements, Minimum Chimney Size Table
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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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