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H H igh efficiency boilers were introduced in response to the energy crisis of the seventies. Most first generation high efficiency boilers were simply standard units that had been hurriedly modified to boost efficiency. These boilers obtained higher efficiencies by permitting steady-state condensation in the heat exchanger and in the combustion chamber. Failure to adequately protect the combustion chamber and heat exchanger from the corrosive effects of condensate meant that most first generation units failed prematurely. The units condensed, eventually corroded, and finally were discarded. Manufacturers learned from their mistakes. They upgraded materials, redesigned heat exchangers and refined their manufacturing techniques. The second generation of high efficiency boilers, which began to appear in the late eighties, was a vast improvement. However, second generation units still experience damage from condensation. Although the materials used in second generation high efficiency boilers last considerably longer, they still eventually succumb to corrosion. THIRD GENERATION TECHNOLOGY After two decades of trial-and-error, the boiler industry has finally realized that high efficiency and long product life can only be obtained by preventing condensation from occurring in the combustion chamber. Raypak’s Advanced Design Boiler is the first of a new generation of boilers that can obtain ultra-high efficiencies without compromising product life. The “secret” to the ADB’s longevity is that condensation occurs only in a corrosion-resistant condensing heat exchanger. The ADB is designed so that condensation will not occur in the primary heat exchanger or the combustion chamber. The result is an ultra-high efficiency product that lasts. Welcome to the future of boiler technology. THE ADB’S NON-CONDENSING PRIMARY HEAT EXCHANGER THE EFFICIENCY YOU WANT The Advanced Design Boiler is the first boiler that can meet your exact efficiency requirements. The ADB, when used without the Condensing Heat Exchanger (CHX), can deliver thermal efficiencies up to 84%. If higher efficiency is required, simply add the Condensing Heat Exchanger to the installation. The CHX is designed to capture the maximum amount of available energy by extracting both sensible and latent heat from the flue gases. That means ultra-high efficiencies – and substantial energy savings. Efficiencies up to % 97 AGA Design Certified Rating ADB with Condensing Heat Exchanger 100 %Efficiency ADB without Condensing Heat Exchanger 95 90 85 80 75 60 80 100 120 140 160 180 200 220 °F Return Water Temperature RELIABILITY. ADVANCED BURNER TECHNOLOGY The heart of any boiler is the burner. It’s a critical component that’s got to be designed right. That’s why Raypak spent over four years perfecting the ADB burner. The result is an industrial grade, fan- assisted burner that provides superior performance and is practically indestructible. Standard high efficiency boilers use burners that are either flimsy flame retention screens that burn out, or radial perforated burners that eventually clog and operate at reduced efficiencies. Unlike these burner designs, the patented advanced design burner will not clog or burn out. In fact, Raypak is so confident, the new burner head is backed with a TEN YEAR UNCONDITIONAL WARRANTY. The ADB’s burner utilizes a solid metal bluff-body burner head to generate a high-intensity aerodynamically stabilized flame. The burner’s turbulent mixing action reduces residence time and increases flue gas recirculation. The result is clean, efficient combustion with NOx emissions well within the limits of the most restrictive air quality requirements.* This is one tough burner and the warranty proves it. * NOx emissions: 0-30 ppm depending on combustion air quality and gas composition. CENTRAL POINT WIRING AND DIAGNOSTICS Raypak boilers have a well earned reputation for being easy to service. The ADB is no exception. In fact, the ADB sets a whole new standard for serviceability – because it’s the first commercial boiler to incorporate central point wiring (CPW). Unlike older control technologies, CPW individually monitors each and every boiler control and safety function. Using an intuitive LED display referred to as the Operation Status Center, CPW gives split- second feedback on boiler firing status. Should service be required, the ADB will even indicate which component requires attention by illuminating the appropriate fault LED located on the ADB’s U-2 Diagnostics Panel. ERROR HEAT FLEXIBILITY. THE CONDENSING HEAT EXCHANGER (CHX) The CHX is a scavenging heat exchanger that has been specifically designed to capture the maximum amount of energy from the ADB’s exhaust gases. When used with a pre-heat tank and a storage tank, the ADB/CHX system can squeeze out an amazing 97% of all heat of combustion energy contained in the flue gases. The CHX is built tough enough to withstand the demanding conditions found in condensing applications. All materials ...