Can you explain pumps in series ? I thought this can cause the pumps to oscillate between each other ? Or is it because the whole system runs at the same flow rate? I understand that burner linked pumps and system pumps can work on different parameters and would need separation if run in series
I believe that if you use modulating pumps in series you will get some detrimental effect. However we've got these pump set at fixed speed so they should not be a downside
@@andrewmillwardwatford9410 that’s what I was thinking, they would have to be fixed for them to work without any oscillating, thanks for reply, great job you’re doing 👍🏼
It is shocking to think this a new house and leaving aside the under performance issue - the basic installation in terms of layout and workmanship is just meh. So what is the need for all these pumps is it just down to undersized pipework? Interesting to see the outturn in terms of COP and I wonder how many of those Heatmiser heads are actually required now that the loops will be under weather compensation control. Keep them coming.👍
We took some readings so we could recalculate the coefficient of performance after a few weeks to see if we got some improvements. We've certainly got the heat pumps Running Up much lower temperatures in warmer weather so that should make a significant difference. What we can't do is match the flow rates on the secondary side to the primary side so they will always be some element of inefficiency due to mixing in the header. I think I've also worked out why we're getting this very strange phenomena of Higher flows and Returns on the primary circuit compared to the secondary
Masters Touch again Andrew !! Look forward to some of this perfection.
Thank you for your kind words
The manifold lpm gauges are clear, I very rarely see that. Normally black. Great vid again Andrew
I believe it's less than 1 year old
Andrew, next house film a before and after. Tnks
Can you explain pumps in series ? I thought this can cause the pumps to oscillate between each other ? Or is it because the whole system runs at the same flow rate? I understand that burner linked pumps and system pumps can work on different parameters and would need separation if run in series
I believe that if you use modulating pumps in series you will get some detrimental effect. However we've got these pump set at fixed speed so they should not be a downside
@@andrewmillwardwatford9410 that’s what I was thinking, they would have to be fixed for them to work without any oscillating, thanks for reply, great job you’re doing 👍🏼
@@boothyktm thank you
Hi Andrew, what KW outside unit is installed? Is it the 4-8kw range or the 9-16kw range?
So taking away the high temperature mixer on the manifolds has made a big difference?
Yes it's loud the temperature in the manifold to be controlled by the heat pump controller
Great little video, what heat curve did you set maximum - minimum flow and return .
Then outdoor temps ? -3 - 21 ?
50c at minus 10c and 25c at 17c
Fantastic
What courses do you recommend for system design?
Best to read the domestic heating design guide
It is shocking to think this a new house and leaving aside the under performance issue - the basic installation in terms of layout and workmanship is just meh. So what is the need for all these pumps is it just down to undersized pipework? Interesting to see the outturn in terms of COP and I wonder how many of those Heatmiser heads are actually required now that the loops will be under weather compensation control. Keep them coming.👍
We took some readings so we could recalculate the coefficient of performance after a few weeks to see if we got some improvements. We've certainly got the heat pumps Running Up much lower temperatures in warmer weather so that should make a significant difference. What we can't do is match the flow rates on the secondary side to the primary side so they will always be some element of inefficiency due to mixing in the header. I think I've also worked out why we're getting this very strange phenomena of Higher flows and Returns on the primary circuit compared to the secondary
Nice one!
Thank you sir
To be fair to daikin their interface isn’t that bad for an AC manufacturer.
It's one of the easier interfaces that I have found so far
Nice video 🙂
Thank you for the compliment