the burner output. The ZC output is energized. The controller continues to monitor the system and automatically restarts if the error condition clears. Refer to Table 4.

The operating sequence for the L7248 is shown in Table 5.

Figure 14: Setpoints and Differentials

G.HIGH LIMIT CONTROLLER

The High Limit opens and turns off the burner when the water temperature reaches the setpoint. The High Limit automatically resets after the water temperature drops past the setpoint and through the Differential. The L7248 models have High Limit Differential presets of 15°F (8°C). See Figure 14.

6.REMOVE GUN ASSEMBLY

LE Boilers equipped with Beckett AFG burners. Items to be checked are nozzle size, type, and angle; head size, (and setting on MD(V1) head); gun setting; and positioning of electrodes. This information is shown in

Figure 15, and Table 6. If the desired boiler firing rate is 0.6 GPH, the nozzle must be changed out, the low firing rate baffle must be installed and the factory settings must be changed according to Table 6. These parts are in the bag attached to the burner. Reinstall gun assembly.

LE Boilers equipped with Riello 40 F3 and 40 F5 burners: Items to be checked are nozzle size, type and angle: settings (air gate, turbulator and pump pressure). This information is shown in Table 6A. Reinstall gun assembly.

7.ADJUST OIL BURNER BEFORE STARTING

A.SET BURNER SETTINGS, see Tables 6 and 6A.

B.OPEN ALL OIL LINE VALVES.

Figure 15: "L1" and "V1" Head Electrode Positioning and Gun Setting (Beckett AFG)

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Image 14
Burnham L7248 High Limit Controller, Remove GUN Assembly, Adjust OIL Burner Before Starting, Open ALL OIL Line Valves
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L7248 specifications

The Burnham L7248 is a notable model in the realm of heating solutions, designed specifically for residential and commercial use. Renowned for its efficiency and reliability, the L7248 embodies innovative technology combined with user-friendly features, catering to diverse heating needs.

One of the key features of the Burnham L7248 is its advanced heating technology. It employs a gas-fired system that provides both hot water and space heating. This dual-function capability ensures that homes remain warm and comfortable during the colder months while also supplying hot water for daily use. The integrated control system allows users to manage the heating effectively, ensuring maximum comfort with minimal energy expenditure.

The L7248 is designed with durability in mind. Constructed from high-quality materials, the boiler is built to withstand the rigors of regular use while maintaining peak performance. Its advanced heat exchanger design enhances efficiency by ensuring optimal heat transfer, which translates to lower energy costs and a reduced environmental footprint. Furthermore, the unit operates quietly, providing a peaceful environment without intrusive noise.

In terms of safety, the Burnham L7248 incorporates several features that protect both the system and the home. It is equipped with advanced safety controls that monitor pressure and temperature, preventing potential hazards. Additionally, the unit’s design allows for easy servicing and maintenance, ensuring that it remains in good working condition for many years.

Energy efficiency is another hallmark of the Burnham L7248. With an impressive AFUE (Annual Fuel Utilization Efficiency) rating, the model significantly reduces fuel consumption, helping homeowners save on energy bills while promoting sustainability. The boiler is also compatible with various smart home technologies, allowing users to integrate it into their existing systems for enhanced control and efficiency.

Overall, the Burnham L7248 stands out for its combination of innovative technology, safety features, and energy efficiency. Whether for residential or commercial applications, it provides a solid, reliable heating solution that meets the demands of modern living. With its user-focused design and robust performance characteristics, the Burnham L7248 is an excellent investment for those seeking dependable and efficient heating.
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