Bypass piping, Use with refrigeration systems

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

Piping connections (continued)

8.Multiple Zoning

a)Zone valves:

Refer to zone valve manufacturer’s literature for wiring and application. A separate transformer is required to power zone valves.

Provide balancing valves to adjust the flow so it is about the same in each zone.

b)Circulators:

Zoning with circulators requires a relay for each circulator. Install flow control valves to prevent gravity circulation. Provide balancing valves to adjust the flow so it is about the same in each zone.

9.If system is to be ASME inspected and approved, an additional high temperature limit is needed. Purchase and install the control in supply outlet piping from boiler.

Bypass piping

BYPASS PIPING IS NOT NORMALLY REQUIRED ON

ANY BASEBOARD SYSTEM

Bypass piping should be used for the following installations. Bypass, supply, and return piping should be same size.

1.See Figure 12 to protect:

•radiant panels, plaster, etc. from high temperature water supplied from boiler, or

•boiler from condensation caused by low temperature water returned from system.

2.See Figure 13 to protect boiler from condensation formed by low water temperature returned from large water content converted gravity systems, etc.

Use with refrigeration systems

The boiler must be installed so that chilled medium is piped in parallel with the heating boiler with appropriate valves to prevent the chilled medium from entering the boiler. See Figure 14. Consult I=B=R Installation and Piping Guides.

If boiler is connected to heating coils located in air handling units where they can be exposed to refrigerated air,gravity circulation during the cooling cycle must be prevented with flow control valves or other automatic means.

Figure 12

Figure 13

10	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.