Piping connections, To protect | Weil-McLain EG guide

(EG Only)

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

Piping connections

Pipe before installing controls. Connect return piping after jacket is attached. Connect supply piping before or after jacket is attached.

Failure to properly pipe the boiler may result in improper operation and damage to the boiler or building.

Forced hot water boilers and gravity hot water boilers

1.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.To protect boiler from condensation formed by low water temperature returned from large water content converted gravity systems, etc., see Figure 4, page 6.

Refer to tables and Figures 11a and 11b.

1.Circulator must be selected and sized according to the design requirements of the system. Size expansion tank to handle the volume of water in the system.

2.Small expansion tanks cause system water to be lost from relief valve. Make-up water is then added

Figure 11a Recommended piping connections forced hot water boilers with closed type expansion tanks

through fill valve. Eventual section failure can result. Expansion tank installation:

a)Closed type expansion tank - connect from the 3/4" N.P.T. tapping on left end section to expansion tank using 3/4" N.P.T. piping. Any horizontal piping must pitch upward toward tank at least 1 inch per 5 feet of piping.

b)Diaphragm type expansion tank - may be located anywhere in the system, preferably near the boiler. Install automatic air vent as shown in Figure 11b.

3.Install water relief valve vertically in“E” tapping.

Relief valve discharge piping must be piped near floor close to floor drain to eliminate potential of severe burns. Do not pipe to any area where freezing could occur. Do not plug, valve or place any obstruction in discharge line.

4.Connect system return piping to left end for EG - right or left for EGH. Supply and return must be on same end of EGH boiler, for proper flow and disposition of water throughout the sections.

5.Installer must provide drain cock(s).

6.Connect cold water fill supply piping close to boiler.

7.Plug all unused tappings.

Figure 11b Recommended piping connections forced hot water boilers with diaphragm type expansion tanks

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.