a.Temperature and Flow Requirements – An existing parallel piping system may be used, provided the return water is not below 80°F and the return water temperature is not more than 80°F less than the boiler outlet temperature. A flow analysis should be performed to determine the flow through the boiler when the minimum

(and smallest) and maximum number of zones are activated.

Sufficient flow through the boiler must be maintained. The recommended maximum temperature difference between the boiler supply and return water is 40°F. However, a maximum delta T of 80°F across the boiler is allowable.

A minimum boiler supply water temperature of 130°F must be maintained to avoid sustained condensing within the combustion chamber.

b.Primary/Secondary Piping - If the conditions above cannot be met, then parallel piping systems must be converted to an arrangement that will provide the proper water flow through the boiler at the proper temperatures. Primary/ Secondary piping is a common method for isolating the boiler from the system. The concept must be for the boiler loop to inject heat into a primary loop, provided the return water into the boiler is at least 80°F. A by-pass containing two closely spaced tees must be installed to de-couple the boiler loop from the primary loop (see Figure 51). The converted system should resemble Figure 52. Care must be taken to avoid dead heading the system pump. Conversions should be reviewed and approved by a Consulting Engineer or other qualified professional to avoid system deficiencies.

Figure 51: Parallel Piping Conversion

Multiple boilers are installed the same as single boiler installations. Each boiler loop will contain its own boiler circulator (see Figure 49b).

The boiler circulator selection will maintain a constant and minimum flow through the boiler during every heat demand. The circulator must be properly selected, based on the design temperature between the boiler supply and boiler return. A boiler circulator must be used with a primary/secondary piping arrangement.

Figure 52: Typical Burnham Boiler -

Primary - Secondary Loop System

c.Alternate Piping Arrangements - Piping arrangements other than Parallel and Primary/ Secondary, such as System Bypass, are acceptable as long as they ensure that the flow and temperature requirements of the boiler are met.

d.Glycol Antifreeze Solutions - Many systems today use ethylene or propylene glycol antifreeze solutions as a measure for freeze protection, as well as a pump lubricator and corrosion inhibitor. The properties of the glycol mixture have an impact on valve and pump sizing. All glycol solutions have a lower specific heat than water.

This means that the glycol solution cannot transfer heat as well as pure water, resulting in the need for higher flow rates. In addition, the viscosity of the glycol solution is usually higher than water, requiring a higher pump head for the same given flow. Consult factory for specific applications, pump selection and flow rate.

e.If this boiler is used in connection with refriger- ation systems, the boiler must be installed so that the chilled medium is piped in parallel with the heating boiler using appropriate valves to prevent the chilled medium from entering the boiler. See Figure 53.

Figure 53: Recommended Piping for Combination Heating & Cooling (Refrigeration) Systems 63

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Burnham FM01FD00B manual Parallel Piping Conversion
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FM01FD00B specifications

The Burnham FM01FD00B is a remarkable heating solution that combines efficiency, reliability, and advanced technology to meet the demands of modern homes and commercial spaces. Standing out in the crowded market of heating systems, the FM01FD00B is designed for those who prioritize both performance and energy savings.

One of the most significant features of the Burnham FM01FD00B is its advanced combustion technology. The system utilizes a high-efficiency burner that maximizes fuel usage, resulting in lower operating costs and reduced environmental impact. The unit is engineered to provide consistent heat distribution, ensuring that every corner of a room reaches a comfortable temperature quickly and effectively.

In addition to its efficient burning capabilities, the FM01FD00B is compatible with multiple heating mediums, allowing it to adapt to various fuel types, including natural gas and propane. This versatility makes it an excellent choice for homeowners looking for flexible heating options that can cater to their specific needs.

The FM01FD00B also comes equipped with a state-of-the-art control system that offers precise temperature management. Users can easily program their desired heating schedule, ensuring optimal comfort at all times. The intuitive interface allows for easy adjustments, making it simple to maintain a cozy environment whether at home or away.

Another key characteristic is the unit's robust construction. Built with high-quality materials, the Burnham FM01FD00B is designed to withstand harsh conditions and provide lasting performance. The durable exterior is resistant to corrosion, further enhancing its longevity and reliability.

Moreover, the system features built-in safety mechanisms that protect against overheating and other potential hazards, ensuring peace of mind for users. This focus on safety extends to its low emissions, making it an eco-friendly choice for those looking to reduce their carbon footprint.

In conclusion, the Burnham FM01FD00B is a high-efficiency heating solution that excels in performance, adaptability, and safety. Its advanced technologies, robust construction, and user-friendly features make it an ideal choice for anyone seeking a dependable and efficient heating system for their home or business. Whether you prioritize energy savings, reliability, or comfort, the FM01FD00B stands out as a top contender in the heating market.
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