Weil-McLain 78 Boiler For Gas, Light Oil, Gas/Light Oil Fired Burners

3e Assemble Block

Prepare flue collector hood assembly:

Make sure gaskets are intact, not torn or otherwise damaged. These conditions can cause possible flue gas leakage and carbon monoxide emissions, resulting in severe personal injury or death.

1.Stand one collector hood module on end.

2.Wipe all flanged surfaces with clean rag.

3.Lay gasket on flange. Refer to Figure 8.

4.Place end cap on gasket, aligning flanged surfaces. Secure with six 5/16" x 5/8" flanged bolts and flanged nuts. Tighten to 30 - 35 in.- lbs.

5.For 878 - 1278:

a.Stand remaining hood module on end.

b.Wipe all flanged surfaces with clean rag.

c.Lay gasket on flange.

d.Carefully place open end of first module on top of gasket, aligning flanged surfaces.

e.Secure with six 5/16" x 5/8" flanged bolts and flanged nuts.

6.Attach flat-stitched sealing rope to hood assembly. See Figure 9:

a.Lay hood on floor with flanged side up.

b.Wipe flanged surface with clean rag to remove dirt and oil.

c. Apply double-faced tape to flanged surface. d. Apply rope to tape beginning on one side of open end of hood, leaving 1/4" extending

past edge. Around corners, bend rope, do not cut. Do not stretch rope.

Do not pre-cut rope. Gas-tight seal must be maintained to prevent possible flue gas leakage and carbon monoxide emissions, resulting in severe personal injury or death.

e. Continue around entire flange. At other open end, leave 1/4" rope extending past edge of flange. Cut off excess rope.

Double-faced tape serves only to hold sealing rope in place during installation. It will disintegrate over time. If collector hood and sealing rope is removed for any reason, new tape and new gasket must be applied.

Double-faced tape applied to

Flat-stitchedflange sealing rope

 

Extend rope 1/4"

Bend rope do not

past open ends

cut or stretch

 

Flue collector hood end cap

Flue collector hood modules

Figure 9 Sealing Rope Application on Collector Hood Assembly

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Part No. 550-141-705

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Weil-McLain 78 manual 3e Assemble Block, Prepare flue collector hood assembly

78 specifications

The Weil-McLain 78 is a high-efficiency, versatile cast iron boiler that has been a staple in residential and commercial heating applications for decades. Renowned for its durability and performance, the boiler is designed to provide reliable heat while maintaining efficiency and minimizing energy consumption.

One of the main features of the Weil-McLain 78 is its cast iron construction. This material is not only known for its longevity but also for its excellent heat retention properties. The cast iron sections allow for a slow, steady heat release, ensuring that spaces remain warm and comfortable. The boiler is built to withstand the rigors of everyday use, making it ideal for both home and business environments.

In terms of technology, the Weil-McLain 78 incorporates an advanced combustion system that optimizes fuel usage. This efficient burning process not only conserves energy but also contributes to lower utility bills for users. Moreover, the boiler is designed to work well with natural gas or propane, giving homeowners and businesses flexibility in fuel choices.

Another characteristic contributing to the Weil-McLain 78’s reputation is its efficiency ratings. With a rating of 83% AFUE (Annual Fuel Utilization Efficiency), this boiler stands out in its class. This efficiency not only reduces carbon emissions but also enhances overall operational effectiveness, allowing for significant energy savings over time.

The Weil-McLain 78 is also designed for ease of installation and maintenance. Its compact design allows it to fit in tighter spaces, and the accessibility of key components simplifies routine servicing. The unit comes with a multitude of options for controls and accessories, ensuring adaptability to various heating systems.

Furthermore, Weil-McLain places a strong emphasis on safety features. The 78 model incorporates multiple safety controls, including a temperature limit switch and an automatic shut-off system. These features help prevent overheating and provide peace of mind for users.

In conclusion, the Weil-McLain 78 combines robust construction, advanced technology, and efficiency, making it an excellent choice for various heating needs. Its reputation for reliability, comfort, and safety has positioned it as a leader in the boiler market for both residential and commercial applications. With the Weil-McLain 78, users can enjoy consistent warmth and comfort for years to come, backed by a trusted name in heating solutions.