Sat, 09 May 2026 21:17:33 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=180487#Comment_180487 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=180487#Comment_180487 Tue, 23 Jul 2013 15:04:05 +0100 Scotch I have a Vigas 25 and 1500l thermal store.
The thermal store temperature never gets above 80 degrees. A friend of mine has a 25kw Eco Angus which heats his thermal store to 90 degrees.
Is there a setting within the menu that I can adjust to increase the temperature?

The thinking is that I may get an extra day between firings at this time of year.

Thanks
Scotch]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=180507#Comment_180507 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=180507#Comment_180507 Tue, 23 Jul 2013 19:33:33 +0100 finny probably a different thermostat cartridge in your mates laddomat or similar loading valve.. You can swap it out for a higher temp one..yours could be a 78 degree unit?]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=180508#Comment_180508 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=180508#Comment_180508 Tue, 23 Jul 2013 19:34:58 +0100 finny https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=180513#Comment_180513 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=180513#Comment_180513 Tue, 23 Jul 2013 20:56:17 +0100 billt
I would look for a boiler thermostat of some sort. My Atmos has a fan thermostat and an air intake thermostat.

Look at page 10 section 4.2 of http://vigasboilers.com/wp-content/themes/vigasboilers/pdfs/Vigas%20Manual%20Feb%202010.pdf. That tells you how to change the boiler water temperature of a Vigas with AK3000 controleer.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=180674#Comment_180674 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=180674#Comment_180674 Fri, 26 Jul 2013 12:15:41 +0100 Scotch Is actually a AK2000, but I found a setting called "Heating Temp". I changed this from 78 to 85, which was its max. The default display now shows 85, so next time I do a burn we will see what happens.

Thanks
Scotch]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=181777#Comment_181777 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=181777#Comment_181777 Tue, 13 Aug 2013 16:29:12 +0100 Scotch
Cheers
Scotch]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=181779#Comment_181779 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=181779#Comment_181779 Tue, 13 Aug 2013 18:26:53 +0100 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=181781#Comment_181781 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=181781#Comment_181781 Tue, 13 Aug 2013 18:54:25 +0100 skyewright Posted By: tonySadly also maximising your heat losses
But unless I'm misunderstanding that's just more rapid heat loss on heat he wasn't previously able to store (i.e. previously lost). The same amount of wood has been burnt in both cases hasn't it? When the store gets down to 80 degrees he's back to the heat loss situation he had before, but he's gained whatever time that has taken since the burn. So that's a win isn't it?

Maybe we're just looking at the same thing from glass half full & glass half empty points of view?]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=181789#Comment_181789 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=181789#Comment_181789 Tue, 13 Aug 2013 21:42:40 +0100 tony
I store hot water at 50C as do most of the population of North America giving rare brownie points for energy use reduction.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=181791#Comment_181791 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=181791#Comment_181791 Tue, 13 Aug 2013 22:01:26 +0100 Phil.Chaddah-Duke
Just had a long meeting with our plumber and this issue came up. He is advising the vented route with our TS and smaller DHW tank and use of flat plate heat exchanger on smaller tank to provide mains pressure DHW but my concern is that the tank would need high 60s-70s to get nice hot water for showers. Will only be the smaller tank rather than the 1000l TS but still seems higher than you could get away with if we were using the water directly rather than through a heat exchanger. So many options!]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=181793#Comment_181793 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=181793#Comment_181793 Tue, 13 Aug 2013 22:24:03 +0100 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=182057#Comment_182057 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=10927&Focus=182057#Comment_182057 Fri, 16 Aug 2013 11:41:32 +0100 jms452
Tony's point about heat loss is correct but is only part of the picture (unless you were to use an immersion heater).

Running less frequently there are less transient inefficiencies starting up the boiler and less instances of hot water left in the pipes.

There is also another downside as the boiler efficiency is probably lower for the last part of the burn when heating the water to 90 rather than 80.

I think it go either way depending on the distance boiler characteristics and distance from boiler to thermal store.

If you really want to tie yourself in knots try considering if a bigger thermal store at a lower temperature is 'better' (even this doesn't have a simple answer).]]>