marshian

You are “Preaching to the choir” @JohnMo

Decade you say 😉 "Alice is that you" Nice to meet someone equally down the rabbit hole

Actually that might not be representative as the boiler was off for an hour while I fugged about swapping the pump and then played with the settings to get the data

28.9 flow 20.4 9 out of 13 rads in circuit

DAB pump swapped back in On PP setting (3 speed selection) CH Proportional differential pressure regulation Speed Watts Head (m) m3/Hr 1 6.5 1.3 0.4 2 9.3 1.9 0.5 3 17.0 3.4 0.5 On PP setting with the optional 6 speed selection CH Proportional differential pressure regulation Speed Watts Head (m) m3/Hr 1 6.5 1.3 0.4 2 8.5 1.7 0.4 3 9.5 1.9 0.5 4 10.0 2.0 0.5 5 11.0 2.2 0.5 6 17.0 3.4 0.5 I've set it to PP2 (of 6) Sitting in the living room all I can hear is the wall clock ticking...............

Definately this ^ Absolutely - it also helps to correlate energy usage with HDD data - that way you can see if any improvements you make to the insulation of the house or the way you schedule the heating has a positive impact It is however a little bit of a rabbit hole and I'm way down there now

https://www.tomato.energy/ why would they not be accepting new customers?

Did have a 16" diameter............. Surely it's already fallen down in the breeze last week????

have a look at this

Yes regardless of the mode selected - all three parameters are displayed

They aren't specified in the manual - I'm taking an educated punt Not difficult to establish the settings - the pump will tell me what they are Just need to start it on the lowest of the 6 and give 5 mins between each change to stabilise the pump

Yep I get that you are using the std 3 settings I'm just musing that 0.4m3/hr might be a smidge lower than the old grundfos - now that might be perfect but and on the basis that the six settings might give a finer control 1 of 3 = 1 of 6 2 of 3 = 3 of 6 3 of 3 = 6 of 6 Then maybe 4 of 6 closer to the 0.48 of the old grundfos pump

I do get the more comfortable element but I'm not sure the cheaper to run is correct - You are replacing the heat loss of a property no matter what heat source is used the cost in energy will be the same - only time you are going to save is if the comfort factor allows you to run lower room temps (hence lower heat loss)

Yep I think I was right Couldn't find pump curves for these settings but I'm going to assume that it gives a finer level of step than the std 3 positions

No such thing

Is that the same as an STD?

I read enough to realise that it was putting ticks in boxes I didn't want ticked so I stopped

Blimey - that's a bit more technical than @Nickfromwales and to be honest my approach too of scribbling on the walls Not quite sure why my bathroom window picture got a like - those bloody thin cuts next to the window drive me nuts as I look at it every day - I could understand getting a couple of but not a like

Hmm - I’ll need to check the destuctions but from memory that mode has 6 settings not 3 - accessed by a long 20 sec press - I was going to try that if the grundfos pump turned out to be a bust (which it did) but at least I now know why I favoured the old pump on speed 1 and why I have to run the new pump on 2 rather than 1 thank you @John Carroll

last time OCD was mentioned we went right off on a tangent

I can fully understand that - having got down to the stage of grouting 2 or 3 tiles at a time I resorted to applying the grout using an icing piping bag with the smallest nozzle I could find in the kitchen in order to minimise the amount that needed cleaning off Warning to others - Mrs Alien wasn't best please when she found out

I seriously contemplated removing the window boarding and cutting the brick aperture a bit wider before re-boarding the window aperture to get rid of those thin cuts. Trouble was I'd already tiled the window aperture and I only had enough tiles to finish the wall and if I broke any I'd be stuffed!!!! Mrs Alien had chosen an end of range tile with limited stock (we bought it all) because it looked like polished concrete and that was what she wanted!!! Nicer to work with than the last tiles she chose Every time I'm in the bath I think of this album Teenager in the 80's is the only thing I can blame PS top tip - 1. never buy textured or riven matt finish wall tiles - if you do be prepared to spend a large chunk of your life removing excess grout from the textured surface 2. Brick acid when used carefully is very good at removal of excess grout

I actually like tiling - but the planning to get the layout right takes bloody forever and no matter how well I plan it out I always end up with a stupid thin cut somewhere so I try to make sure it's where I'm never going to see it That one worked out really (expletive deleted)ing well for me!!!!

Pump Mode selection was covered here

I'm running the Evosta 3 pump on Constant Differential Pressure - data from pump display on speeds 1 & 2 posted earlier That's really interesting and if I can summarise "for the cheap seats" (Me) Effectively order in terms of flow is Evosta3 Speed 1 - 0.3 m3/hr Grundfos Speed 1 - 0.48 m3/hr Evosta3 Speed 2 - 0.5 m3/hr Grundfos Speed 2 - 0.55 m3/hr Does explain why system doesn't like Evosta3 speed 1 and why I feel Evosta3 Speed 2 is a little noisier (system noise) than my old Grundfos was and sort of validates my want /need for the old pump from a noise perspective Please note - the noise aspect is me being really (expletive deleted)ing picky and to be honest from an energy usage perspective I should probably go back to the Evosta3 on speed 2 as I could run that pump for 4 hours (15 w) for the same consumption as the Grundfos chews thro (58 w) I'm pretty sure the consumption would be ~40w on speed 1 if it worked but as it doesn't and I don't know why My gut tells me I need a setting between speed 1 and speed 2 on the Evosta3 Thanks for you input @John Carroll