![]() When boiler manufacturers reduced the size of new steam boilers, the people at M&M designed this feeder to protect those smaller boilers from nuisance shutdowns. In residential steam heating, you can do this very effectively with McDonnell & Miller’s WFE Water Feeder. So, if a boiler is rated for, say, 500,000 Btu/hr., and the water level drops to the feed line, you should be adding about 2 GPM to keep the burner on. Ideally, they should be fed at 1 GPM per 250,000 Btu/hr., Gross Load (D.O. It works like this: All boilers, regardless of their size, lose water to steam at a constant rate. How much water a boiler needs to keep operating depends on its firing rate, and this is very easy to calculate. A feeder can also protect a steam boiler by keeping it fed with water should the gas valve lock itself in the open position. An automatic feeder will keep the boiler running at its safe, minimum water line, and will keep the house warm. For instance, suppose there’s a leak in the system during the dead of winter when they aren’t home. That’s because their heating contractors took the time to explain the benefits to them. Some home owners like to feed their steam boilers by hand, but the vast majority of home owners choose the convenience and backup safety advantages of an automatic water feeder. Even if there are just a few feet of buried return line on the system, there’s a good chance it’s leaking. This type of leakage is especially aggravated by steam pressure that’s kept higher than necessary for the system, a condition we see all the time. Where does the water go? It leaves the system by evaporation, through leaky air vents on the radiators and mains. ![]() How much water they need depends a lot on the system’s age and condition, but the feeding process never ends. With steam heating systems, you can count on one thing: They will always need feed water. ![]()
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