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

14b Make Final Adjustments

Skim steam boilers:

Clean all newly install steam boilers to remove oil. Failure to properly clean can result in violent water level fluctuations, water passing into steam mains, or high maintenance costs on strainers, traps and vents. Skim boiler only. Do not clean old piping or leaks can occur.

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

1.Remove 2" plug from 3" x 2" bushing at skim tapping. Provide 2" skim piping from tapping to floor drain.

2.Raise waterline to midpoint of skim piping.

3.Fire burner to maintain temperature below steaming rate during skimming process.

4.Feed in water to maintain water level. Cycle burner to prevent rise in steam pressure.

5.Continue skimming until discharge is clear. This may take several hours.

6.Drain boiler. While boiler is warm but not hot, flush all interior surfaces under full pressure until drain water runs clear.

7.Remove skim piping. Re-insert plug at boiler skim tapping.

8.Close drain cock. Fill with fresh water to normal water line. Start burner and steam for 15 minutes to remove dissolved gases. Stop burner.

9.Check traps and air vents for proper operation.

Determine if water treatment is needed (water boilers only):

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

Continual make-up water will reduce boiler life. Minerals can build up in sections, reducing heat transfer, overheating cast iron and causing section failure.

For unusually hard water areas or low pH conditions (less than 7.0) consult local water treatment company.

Freeze protection (when used):

1.Use antifreeze especially made for hydronic systems. Inhibited propylene glycol is recommended.

Do not use automotive, ethylene glycol or undiluted antifreeze. Severe personal injury or death can result.

2.50% solution provides protection to about -30°F.

3.Local codes may require back-flow preventer or actual disconnect from city water supply.

4.Determine quantity according to system water content. Boiler water content is listed on page 31. Percent of solution will affect sizing of heat distribution units, circulator and expansion tank.

5.Follow antifreeze manufacturer’s instructions.

Check boiler for gas-tight seal:

 

 

 

 

Boiler must be sealed gas-tight

 

 

 

 

 

 

 

 

to prevent possible flue gas

 

 

 

 

 

 

 

 

leakage and carbon monoxide

 

 

 

 

emissions, resulting in severe

 

 

 

 

personal injury or death.

 

1. Remove boiler jacket side and top panels.

 

2. Start burner. Observe all sealing points and

 

chalk mark any not gas-tight.

 

3. To seal all chalk-marked areas:

 

a. use silicone sealant on section flueways.

 

b. check gaskets and sealing rope placement.

 

4. Reinstall all jacket panels.

26

 

 

 

Part No. 550-141-705

Page 25 Page 27
Page 26
Image 26
Weil-McLain 78 14b Make Final Adjustments, Skim steam boilers, Determine if water treatment is needed water boilers only
Page 25 Page 27

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