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Old 01-13-21, 06:27 AM   #12
Apprentice EcoRenovator
Join Date: May 2011
Location: Tortosa, Spain
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If your connections are as you say then they are the wrong way around.
Heat always travels from hot to cold, never the reverse.

You need to feed the hottest water to the hottest point of the tank for it to transfer otherwise you will find the water leaving the top of the heat exchanger may well be the temperature of the hottest water in the tank.
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