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Fuel may be wasted every time a burner shuts off . . . . . . because the burner must purge. Each post purge is followed by a prepurge. cold, fuel wasting air is blown into the boiler and heat is exhausted outdoors. Wear and tear on burner components and gas valves take their toll too. The temperature or pressure in the boiler fluctuates and can cause system problems or excessive wear and tear. The TURNDOWN RATIO of a burner is the ratio of maximum firing to minimum firing. Most burners operate at about a 2:1 ratio. -weishaupt- is much higher due to having a superior design and higher quality. Don't confuse the term "fully modulating" and high turndown. "fully modulating" merely means that a burner modulates between high fire and low fire. Having a car that you can drive between 30 and 60 mph can be said to be "fully modulating" but it is obviously a fuel hog due to all the starts and stops you'd need to make. The -weishaupt- mixing head is so efficient. Unlike others, air and fuel can mixed with very small fuel input flow, resulting in high turndown. The result is less starts and stops; less wear; better control and lower fuel bills.
For discussions on TURNDOWN, see our technical articles section. |
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