Lead Lag Control System for Water Heaters
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United States of America Patent
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Issued Date -
Jun 9, 2016
app pub date -
Dec 8, 2015
filing date -
Dec 8, 2015
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Abstract
A control system is shown for a series of two or more water heaters arranged in parallel. A cold water supply line delivers cold water from a cold water source to a cold water inlet at each of the respective two or more water heaters arranged in parallel. A low pressure restriction is present at each cold water inlet of the water heaters which presents a low pressure restriction to the flow of cold water at each cold water inlet. A by-pass valve is also present at the cold water inlets for by-passing cold water from the cold water supply line around each of the low pressure restrictions. A hot water discharge line receives and discharges hot water from each of the water heaters. A controller is used to control when each of the by-pass valves will be open or closed based upon demand with only the by-pass valves being open which are needed to meet demand placed upon the system.
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