Boiler manual: • Installation • Start-Up • Maintenance • Parts

Connect steam boiler piping (continued)

Figure 26 Multiple Steam Boiler Piping Gravity Condensate Return

See page 18 for numbered circle references.

APipe as shown for gravity return systems, connect- ing point A to the wet gravity return.

•For pumped-return systems, install boiler water level control on each boiler with body mark at level indicated in Figure 42, page 28. Provide at point A either:

•Separate feed pumps and check valves for each

boiler, or . . .

•Single feed pump, with separate solenoid valve for each boiler.

BFor pumped-return systems, install a combination float and thermostatic trap on each boiler to prevent flooding of one boiler while other boiler is firing. Install trap in skim tapping (see Figure 39, page 27). Connect traps to condensate receiver.

Gravity-return systems are self-levelling if the wet returns are piped to the common system wet return.

CInstall boiler piping as shown in the preceding pages of this manual.

Part No. 550-100-068/0308

DInstall stop valves per ASME code requirements.

•For pump-return systems, if using automatic steam valves, use only slow-opening automatic valves. Use a Weil-McLain Boiler Control Sys- tem (such as a BCP panel) to open each steam valve automatically before firing burner.

EConstruct common supply drop header with pipe size at least same size as largest boiler header size.

FUse:

•A Weil-McLain Boiler Control System (such as

a BCP panel) with header-mounted pressure control(s) to sequence boilers, or . . .

•A steam pressure controller.

GInstall drip line in common supply drop header.

•Gravity-return: Pipe drip line to wet return.

•Pumped-return: Use combination float and thermostatic trap and drain to condensate receiver.

19

Page 18 Page 20
Page 19
Image 19
Weil-McLain 88 manual Multiple Steam Boiler Piping Gravity Condensate Return
Page 18 Page 20

88 specifications

The Weil-McLain 88 series is a commercial cast iron boiler recognized for its durability, efficiency, and versatile design, making it a preferred choice for various heating applications. Designed primarily for commercial and industrial use, the Weil-McLain 88 combines advanced technology with proven engineering principles to deliver reliable performance and long-lasting service.

One of the standout features of the Weil-McLain 88 is its cast iron construction. Cast iron is renowned for its ability to retain heat, resulting in lower fuel consumption and more consistent heating. This robust material ensures that the boiler can withstand high temperatures and pressures, making it suitable for heavy-duty applications. The sectional design of the boiler allows for easy installation and maintenance, enabling quick access to components and minimizing downtime.

In terms of efficiency, the Weil-McLain 88 is designed to achieve high thermal efficiency ratings. The boiler employs a flue gas recirculation system, which significantly reduces heat loss and maximizes energy utilization. Additionally, its low water content provides rapid heating response times, ensuring that spaces are heated promptly, even during peak demand periods.

Another noteworthy characteristic of the Weil-McLain 88 is its versatility. The boiler can be configured for a variety of applications, including hot water heating, hydronic heating systems, and steam heating. It is compatible with multiple fuel types, including natural gas, propane, and various oil options, allowing for flexibility in fuel choice based on availability and pricing.

The Weil-McLain 88 also incorporates advanced control technologies that enhance operational efficiency. The integrated electronic controls feature diagnostic capabilities to streamline troubleshooting and maintenance, ensuring optimal performance throughout the boiler’s lifespan. Moreover, the boiler's design is compatible with modern building management systems, allowing for seamless integration into existing heating setups.

Overall, the Weil-McLain 88 series stands out for its combination of quality construction, efficient operation, and adaptability to different heating needs. Whether for a commercial building, industrial facility, or institutional application, the Weil-McLain 88 provides a reliable and efficient heating solution that meets the demands of the modern world.
Top Page Image Contents