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More information on pumps can be found in Pumps.
Pump control - Temperature control over
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low loss header - 2 points
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The rpm of the pump is modulated to minimise the overflow from hot water generated from the boiler into the return pipe. A high return temperature can result in lower production efficiency. By modulating the pump to maintain a certain temperature difference before and after the low loss header, the overflow is minimised. In this case, the supply temperature is measured and used. More information on the disadvantages of a low loss header can be found in Header configuration.
Pump control - Temperature control over
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low loss header - 4 points
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This template is similar to the previous template “Pump control - Temperature control over open low loss header - 2 points“, except for the use of four temperatures instead of two. In this case both the flow temperatures as the return temperatures are used to modulate the pump rpm.
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