Last seen: Dec 19, 2025
I thought we’ve been here…. It’s fact isn’t it?
I ought to make a correction - I said it shuts down when it passes the set temp. What I meant to say it modulates as it reaches the set temp. And as @...
I think your current room temp chart confirms that you need to be much higher than 30c flow temp. It is reaching your target room temp. And as is ofte...
@westkent it’s defrosting when the flow temp line (in blue) drops below the return temp line. (In black) The flow temp rapidly drops because the de...
@westkent hi i can see now that at zero OAT these charts are showing defrosting. There seems to be a consistent deltaT. Does you house get up to the...
Was this chart taken when the house was cold? I think it would help others to interpret this if you can give OAT outside ambient temperature and insi...
From an experience point of view I have been watching our fixed flow rate Ecodan operate for a few years now and have seen how versatile its modulatio...
Here might be a case in point James. Here are 2 hourly charts showing flow and return. These are supposed to be operating at fixed flow 34C and...
@heacol I’ve also herd that a volumiser can help with short cycling. I wondered if short cycling would be reduced if it was caused by mild outdoor a...
Just to confirm… our system does not have a volumiser, buffer tank or LLH. Here is a chart showing how our defrosts occur. There is a 2 or 3 minute...
I didn’t see your earlier reply to @old_scientist which goes a lot further in detail. Which is pretty convincing. ive copied it here for a reminder....
There are some compelling arguments for putting the volume on the flow side and I’m almost persuaded. However the emphasis appears more weighted on de...
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