Mon, 25 May 2026 22:12:05 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14235&Focus=239862#Comment_239862 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14235&Focus=239862#Comment_239862 Wed, 04 May 2016 07:16:46 +0100 cjard
In this diagram, a time clock activates it for dhw.. But unless the stat has a temperature below which it is open eg 40 degrees, and then it is closed up to 65 at which point it opens again, then it looks like a call for dhw means both HP and immersion activate? If the stat has a range then I can see how a tank at 0 would be first heated by the pump, which would then tail off as it peaked at eg 40, and the immersion take over til whatever temp is dialled in..

I just don't seem to find stats that work that way, so im wondering if this diagram is not really a situation one would create in practice. I think instead if it had a 2 channel progger, I could ask for dhw on channel 1, and really just do pasteurising on channel 2 using the immersion.. But if I did want a larger volume of very hot water regularly, configure channel 2 to coincide with channel 1 ending its call for dhw from the pump and use the immersion to top off? (Or fit an inline heater)

Edit: added a couple of other pics from a different manual that help explain the inputs 3,6,7,13,15 etc]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14235&Focus=239863#Comment_239863 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14235&Focus=239863#Comment_239863 Wed, 04 May 2016 07:32:03 +0100 cjard https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14235&Focus=239864#Comment_239864 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14235&Focus=239864#Comment_239864 Wed, 04 May 2016 07:42:02 +0100 PeterW
It works on the process of saying that if the tank hasn't got to X degrees and the relay is opened then the timer allows for another 15/30 mins before it flicks the HP onto the heating circuit and let's the immersion finish the job on the tank.

There is a graph in the book somewhere - I've also got some other info somewhere on what each of the connectors does that JSH sent to me.

If I find it I will send it to you]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14235&Focus=239871#Comment_239871 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14235&Focus=239871#Comment_239871 Wed, 04 May 2016 08:52:37 +0100 cjard https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14235&Focus=239875#Comment_239875 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14235&Focus=239875#Comment_239875 Wed, 04 May 2016 10:22:45 +0100 PeterW
I've looked at this as it depends how you want to run it but I've looked at wiring as a W-Plan circuit with DHW as priority and the heating - UFH - as the secondary.

The HP I've looked at can do multiple temperatures - I'm using a 3 way valve and a relay to switch the temperatures over so when its on DHW its 50c, and UFH its 35c.

The downside on W-Plan is that unless the tank is hot, then DHW isn't available. You could do something cunning with a secondary on your timer where if it kicks in - either by manual select or timer - then it overrides the cylinder stat and makes the HP assume that the tank is hot and allows the HP to transfer to the heating circuit and uses the immersion to finish off the tank.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14235&Focus=239877#Comment_239877 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14235&Focus=239877#Comment_239877 Wed, 04 May 2016 10:54:58 +0100 Gotanewlife Posted By: PeterWdo something cunningYes and it can be very cunning if you use REUK who will make exactly what you want onto a board for pennies (well £20-30). Like if temp A 5 deg below B (he'll supply temp sensors as well) and higher than X deg then 15mins on unless timer open though relay C etc etc - fits relay(s) on board if you need.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14235&Focus=239919#Comment_239919 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14235&Focus=239919#Comment_239919 Wed, 04 May 2016 22:30:42 +0100 JonG https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14235&Focus=239921#Comment_239921 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14235&Focus=239921#Comment_239921 Wed, 04 May 2016 23:23:24 +0100 cjard
Turn that switch off and the pump goes back into heating mode, which it seems to run in all the rest of the time regardless of other inputs.

Is there a setting I need to alter that will allow the pump to obey the s1-s4 switches?

Also I could do with these bits if anyone knows where:
230v relay
Two channel hot water programmer with volt free connections (why is everything always switched live? If it was volt free then switched live is just a user installable jumper away..)]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14235&Focus=239968#Comment_239968 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=14235&Focus=239968#Comment_239968 Fri, 06 May 2016 07:16:59 +0100 cjard
I haven't found a volt free programmer but I can use a couple of contactors to switch the loads (one is 16a) so all gravy! Finding an enclosure seems to be the biggest pain]]>