Weil-McLain 78 manual 3a Assemble Block, Install back refractory blanket, Prepare back section

Page 6

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

3a Assemble Block

Sections are top heavy. Unbolted sections may fall if not supported, resulting in severe personal injury or death.

Install back refractory blanket:

1.Lay back section on floor with ports face up.

2 Apply water glass as an adhesive to blanket.

3.Press blanket against back target wall as shown in Figure 4.

4.Using knife, cut hole through blanket to expose observation port opening.

Prepare back section:

1.Apply 1/8" continuous bead of sealing rope adhesive in sealing rope grooves. See Figure 4. Do not get any adhesive on machined port surfaces.

2.Place 1/2" sealing rope in groove. Around curves, grasp at 1" intervals and push together. Do not stretch.

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

3.Remove any grit from port machined surfaces with clean rag.

Do not use petroleum-based cleaning or sealing compounds in boiler system. Severe damage to system components can result, causing substantial property damage.

4.Place 7-1/2" and 3-1/2" sealing rings in appropriate port openings. See Figure 4. If sealing ring slips out of groove, stretch ring gently for several seconds, then reposition in groove.

 

 

Cut off rope

 

 

even with

 

 

edges

 

Sealing rope

7 1/2"

 

 

 

Sealing

 

 

 

 

 

 

 

 

 

 

 

 

ring

 

Cut off rope

 

 

 

 

even with

 

 

 

 

edge

 

 

 

 

 

 

Sealing

 

 

 

rope

 

 

 

Cut out

 

 

 

observation

 

 

 

port opening

Cut off

 

 

 

 

rope

 

 

Back refractory

even

 

 

 

 

(apply waterglass

with

 

 

 

 

to entire back side)

edge

 

 

 

 

 

 

 

3 1/2” Sealing ring

 

Figure 4

6

Part No. 550-141-705

Page 5 Page 7
Image 6
Page 5 Page 7
Contents Boiler Manual Contents Before selecting boiler location 1a Before Installing BoilerInstallation must comply with Provide combustion and ventilation air openingsLay a foundation, if needed 1b Before Installing BoilerProvide clearances for servicing around boiler Boiler Foundation Length TableLifting Weight Chart 2a Set Packaged Boiler or Block Assembly in PlaceFor block assembly For packaged boilerInstall back refractory blanket 3a Assemble BlockPrepare back section Page 3c Assemble Block Install burner mounting plate on front sectionIf using TI sections Prepare remaining sectionsPage Prepare flue collector hood assembly 3e Assemble BlockInstall flue collector hood assembly 3f Assemble BlockPage Install piping 5a Connect Water Boiler PipingGeneral water piping information Page 6a Connect Steam Boiler Piping General steam piping informationSteam Boiler Pipe Size Table Based on 2-Pipe Steam System Page Page Page Page Page Page Page Page To install burner 12a Install Burner13a Wiring and Fuel Piping To wire burner and boiler controlsTo fill water boilers 14a Make Final AdjustmentsAdjust burner and breeching damper To fill steam boilersDetermine if water treatment is needed water boilers only 14b Make Final AdjustmentsSkim steam boilers Check boiler for gas-tight seal15a Data and Dimensions Data Dimensions15b Data and Dimensions 16a Parts 16b Parts Figure No Description17a Ratings Part No -141-705/0600

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.
Top Page Image Contents