- L.E.S. Products Overview
VI High Efficiency Condensing Boilers
VI High Efficiency Condensing Water Heaters
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VI High Efficiency Condensing Boilers are designed and constructed to 30psi with 100 psi construction optional. These boiler are primarily intended for reduced temperature close loop hydronic heating applications and are equipped with high turndown modulating gas burners. Minimum of four square feet of heating surface per boiler horsepower. No minimum flow requirements, no temperature differentail limitation and of course the L.E.S. five year thermal shock warranty.
VI High Efficiency Condensing Water Heater are designed and constructed to 100 psi. These water heaters are primarily intended for domestic and/or process water heating and are equipped with high turndown modulating gas burner. Fully hot dipped galvanized with four front mounted anodes, fully accessible from the front. Galvanized, lining complies with ASTM-123 B-6 as per ASME HLW-200. No minimum flow requirements, no temperature differentail limitation and of course the L.E.S. five year thermal shock warranty.
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The best feature of Scotch Marine and Firebox boilers are combined to produced a compact and durable wetback boiler. These three-pass Firetube boilers, designed to fit thru standard 30" and 36" steel fire door, provide optimum performance at minimum cost. They feature a proven water- surrounded cylindrical furnace, ceramic fiber refractory rated for continuous 2600F duty, easy access to both heads and furnace via removable doors, and state -of-the-art-tabulators. Combustion efficiency the 82-83% range are guaranteed and maximum non-condensing affiances of 83.6% can often be obtained. The absence of short stay bolts combines with a U-Type flex-joint between furnace and front tube sheet to minimize thermal stress and consequent "shock" damage to boilers. Series HF/HW boilers offer exceptional value, efficiency, reliability, and ease of installation and maintenance. Elimination of side access trappings HF/HW boilers permits close spacing and simplifies installation. Particularly for steam replacement application, this is an optimum boiler design.
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Originally, vertical Firetube heating vessels were used primarily as storage-type domestic water heaters. However, commercial burner improvements (forced-draft, turbulent-mixed combustion requires reduced volume and permits increased furnace pressures) and the development of bent-steel turbulators (30" long turbulators typically reduce exhaust stack temperatures by more than 150°F) enabled re-design to simultaneously increase combustion efficiency and reduce boiler size and cost. Elimination of thermal stress due to temperature differentials across heads is inherent in the one-pass vertical construction, and the cylindrical design permits inexpensive modification to meet high pressure code requirements. By changing turbulators to "spinners", stack temperatures can be increased so that 60-80°F water in heat pump systems can be heated directly (no mixing valves, etc.). Whether purchased for a new building or as components of a replacement heating plant, Series VW boilers minimize floor space requirements and simplify handling and installation. -
Adequate standby protection, longer system life, reduced noise levels, multi-use flexibility, space conservation, and ease of moving boiler modules into place are all important modular heating plant advantages, but long-term fuel efficiency is the primary reason for choosing L.E.S. modular boilers over competing single or dual boiler heating plants. While engineers must design for maximum load conditions, heating plant operation under typical load determines practical efficiency. L.E.S. Series SC Sequencing Control Packages take advantage of inherently superior modular turndown ratios to match heating plant output to actual demand during even the mildest weather. Costly heat loss is eliminated by leaving unnecessary capacity at room temperature and destructive cycling of burners and related equipment is minimized by effective delay timing. Interlock terminals are provided for common boiler room safety limits and for control and proof of combustion air. L.E.S. can provide integral heating plant control (7-Day programming with indoor/outdoor temperature override, boost, and/or alarm, per specifications) or terminals (isolating relays optional) for interfacing with new or existing energy management computers. Complete L.E.S. Modular Heating Plants, including boiler shells, burners, pumps, control packages, and boiler feed systems combine state-of-the-art design with assured component compatibility and single-supplier responsibility. 