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GAS FIRED MODULATING WATER HEATING APPLIANCE WITH DUAL COMBUSTION AIR PREMIX BLOWERS
GAS FIRED MODULATING WATER HEATING APPLIANCE WITH DUAL COMBUSTION AIR PREMIX BLOWERS
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机译:带有双燃烧空气混合气鼓风机的燃气调节水加热装置
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摘要
A water heating apparatus uses a low range blower assembly and a high range blower assembly, each providing a variable flow of premixed fuel and air to a burner assembly. Appropriate choice of the operating ranges of the blower assemblies can provide a high turndown ratio approximately equal to the product of the turndown ratios of each of the individual blower assemblies. Turndown ratios as high as 25:1 are achievable.
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