Final adjustments, Water treatment | Weil-McLain EG instruction

7	EG, PEG, EGH GAS-FIRED BOILERS — SERIES 4 — BOILER MANUAL

Final adjustments

Water treatment

Do not use petroleum-based cleaning or sealing compounds in boiler system. Severe boiler damage will occur.

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

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

Freeze protection (when used):

Use antifreeze especially made for hydronic systems.

Inhibited propylene glycol is recommended.

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

50% solution provides protection to about -30°F.

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

Determine quantity according to system water content. Boiler water content is listed on page 27. Remember to add in expansion tank water content.

Follow antifreeze manufacturer’s instructions.

Filling water systems

1.Close manual air vents, drain cock, and automatic air vent, if used.

2.Fill to correct system pressure. Correct pressure will vary with each application. Residential systems are often designed for 12 pounds of cold fill pressure.

3.Open automatic air vent one turn, if used.

4.Open manual water feed valve.

a)Starting on lowest floor, open air vents one at a time until water squirts out. Close vent.

b)Repeat with remaining vents.

5.Close manual water feed valve when correct boiler pressure is reached.

6.If purge valve is used - located in the return piping above isolation valve:

a)Connect hose to purge valve.

b)Close isolation valve. Open purge valve.

c)Open hand water feed valve and allow system to purge all air. If system has more than one circuit, purge each circuit separately by opening each balancing valve one at a time.

d)Close purge valve and water feed valve cock.

e)Open isolation valve.

f)Fill system to correct pressure.

Filling steam boilers

1.Do not fill (except for leakage tests) until boiler is ready to be fired.

2.Fill to normal waterline, halfway up gauge glass.

3.Boiler water pH 7.0 to 8.5 is recommended.

4.Follow skimming procedure.

16	Part Number 550-110-639/0703

EG specifications

The Weil-McLain EG Series is a notable line of cast iron, steam, and hot water boilers designed primarily for commercial and residential heating applications. Known for its robustness and efficiency, the EG boiler series has become a preferred choice for many heating professionals.

One of the main features of the Weil-McLain EG series is its durable cast iron construction. This material not only contributes to the longevity of the boiler but also ensures excellent heat retention and uniform heating. The boiler's heat exchanger is optimized to maximize thermal efficiency, delivering reliable and effective heating performance across various applications.

Another key aspect of the EG series is its heating capacity. Available in a range of sizes and outputs, the EG boiler provides flexibility, making it suitable for different heating needs. Whether it’s a small residential installation or a larger commercial system, the EG series offers models that can be tailored to meet specific load requirements.

Advanced technology is integrated into the Weil-McLain EG series to enhance efficiency and ease of use. One notable feature is its ability to operate with both gas and oil fuel types, enabling users to choose the most economical and accessible option for their needs. Additionally, the EG boilers come equipped with a reliable and intuitive control system that simplifies operation and maintenance tasks, allowing users to monitor performance easily.

The EG series also incorporates safety features, such as pressure relief valves and advanced combustion controls, which ensure safe and efficient operation. This attention to safety is essential in protecting both the system and the inhabitants of the building it serves.

Maintenance of the EG boiler is designed to be straightforward, with serviceability being a prominent focus in its design. The boiler's modular components can be accessed easily, significantly reducing downtime for repairs and maintenance.

In conclusion, the Weil-McLain EG series stands out for its reliable performance, efficiency, versatility, and robust construction. Its combination of advanced technology and user-friendly features makes it a leading choice for those seeking a dependable heating solution. Whether for residential or commercial applications, the EG series is engineered to deliver consistent heating while maximizing comfort and minimizing operating costs.