DHW Issue with DPS Heatbank


Postby johnykp » Wed Mar 07, 2018 12:24 am

Good evening guys, I've been in my current house for just over 12months and can't seem to fix the issue we have. We only seen to get half a bath of hot water before the water goes lukewarm. I have a Worcester 30cdi boiler and a dps cpc250-abbdi-laab heat bank. The system supplies 14 rads over 3 floors and 3 ufh zones, I have never had an issue with the CH. I have tried all sorts of different things but to go avail. Any ideas what could be causing the water to go Lukewarm after about 10mins?

Both stats are set at 70,the Combi sits about 84-88c, the DHW pump is a new grundfos ups2, the heat exchanger pump is a wilo rs26/6-3. The Combi has had a full service check with so issues . The system is running at 2bar and there is magnaclean installed. Both heat exchangers are 100kw.
johnykp
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