Bradford-White Corp BRHHV, BRHHH warranty 4B.3 Water Flow Requirements Water Heater

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Figure 4. Hydronic Piping - Multiple Boilers.

4B.3 Water Flow Requirements — Water Heater

In a water heating application (an open system), new water is constantly being introduced. With the new water comes a fresh supply of minerals that can be deposited on the unit’s heat exchanger. This is commonly known as scaling. The amount of minerals will depend upon the hardness of the water. Water can also be aggressive, and can erode metals, including copper, if the water is moved too quickly. Pump sizing for the Brute Magnum water heater is based upon the hardness of the water. The water flow is kept high enough to prevent scaling, but low enough to prevent

tube erosion. For extremely soft or hard water, cupro- nickel tubes are available. Contact a Bradford White Representative if you have questions or concerns about water quality.

The Brute Magnum water heater has an internal mixing system that ensures that the condensation does not occur on the finned copper heat exchanger, with heater return temperature down to 50°F (10°C). This

system, that consists of automatically actuated and linked valves, is set up at the factory, and is non-adjustable. The return water goes through the stainless steel heat exchanger, then to the mixing system. (see Figure 7).