The flow rate decreases after replacing the heat exchanger
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Hello, everyone! The old coil-type heat exchanger, which previously used pipes with a diameter of DN100, has been replaced with a plate heat exchanger with DN65 pipes; it is used for central air conditioning water, and now there is a problem with vacuum creation by the pump. (He used to install the water pump at the hot water outlet, drawing water from the heat exchanger.) How can this pressure issue be resolved without modifying the pipes?
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Do you mean that the pump draws water out of the heat exchanger? The vacuum condition that occurs is it due to an insufficient water supply in the heat exchanger?