Why Boiler Protection?
Today’s demands for comfort and efficiency require greater attention to the temperature and volume of return water to the boiler. Many premature boiler failures can be traced to these two uncontrolled variables. Operating below minimum temperatures and flow rates creates thermal shock conditions and flue gas condensation issues, each of which can shorten the life expectancy of a boiler. Other factors that affect return temperature and flow include:
- snow melt and radiant flooring applications
- complex system integration and control
- outdoor reset and warm weather shutdown
- misunderstanding the protection value of primary/secondary systems
- conversion of steam or gravity flow systems to pumped water systems, while retaining the original oversized distribution systems
The concept of boiler protection has existed for many years. However, the primary focus in hydronic systems is often the demand and delivery design characteristics. Frequently, little attention is given to the heat source – the boiler.
Controlling Return Temperatures
The Burnham Commercial RTC Return Temperature Control provides an economical and effective means of boiler protection from thermal shock and sustained condensing operation. By expanding the “boiler envelope” to incorporate a 3-way valve and flow control system, the RTC Return Temperature Control maintains a minimum return water temperature of 135°F or greater.
The RTC system is supplied as a kit and can be incorporated into most hydronic hot water applications with minimal modifications to the system design and operation. It provides a simple means for boiler protection and an opportunity to increase operational efficiency