Last seen: Jul 9, 2025
yes. Quote right, accuracy and 1c increments could lead to a skewed interpretation especially when we are only looking at 1or 2c variations. ive tri...
Thanks for your comments Ian, it’s very much appreciated. Half the battle has been understanding and using the correct terms and acronyms, and realis...
not sure of the “where” bit of your question - the DT I mean is the temperature differential between Primary Flow and Primary Return. These temperatur...
Hi @derek-m The temperature difference of 1.5c is between Primary flow thermistor and Secondary flow thermistor. See sketch for positions and approx d...
@derek-m hi sorry I’ve spent one hour writing a reply to you and when I sent it it was lost without a trace. I can’t face re writing it again
Early test results showing opposite is happening in our system. I’ve opened up the primary pump valve until flow rate went up to 15 LPM (was 13) an...
Thanks @derek-m I will check the pump speeds. I recall the primary pump was adjusted to flow at 12 LPM but the secondary pump was left operating sligh...
@william1066 yes there’s are three sensors in total but only 2 are needed to activate the pump for the solar circuit. one is mounted in the roof top...
Another way I thought of checking efficiency was how long the DHW reheat took. Since there are less chances of cycling etc. So I set up a forced DHW...
@cathoderay great points and perfect timing. 👍
As @cathoderay says, there’s a lot of mixed feelings about the risks especially in an unvented system with high useage. It’s fascinating how how even ...
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