
Last seen: Sep 18, 2025
OK... so the point being made in the manual is that an 'ordinary' domestic central heating pump gets operated with a PWM signal, provided that it is c...
I'm pretty sure that @mike-h 's Pump-2 is a UPS15-20 (or -30) which is the type most commonly used for domestic radiator circuits. It's likely to have...
Mike H's set-up (details to follow pending any additional photos) And here's the relevant installation diagram from the Grundfos manual for Pump-2...
I'm adding the annotations for everyone else... ... especially those who will arrive at across this topic in the months and years to come 😉 Annot...
Let's label a few bits:
Salamander make pumps for pressurised showers. Some have automatic pressure regularisation, which enables them to deliver hot and cold evenly when dra...
There's a measure of truth in this. The one thing that they didn't do was to create a public survey/consultation from which to learn 'best practice'. ...
I'd suggest you order component parts from the right sort of supplier. If you know what's the part you require, then try BES. If you're unsure, th...
The better option is for them to fit control systems which can be monitored remotely. That enables them to check temperatures, flow-rates and efficien...
For interest and comparison, here's a photo inside the connection cabinet of a ground-mounted substation transformer: The centre columns between F...
Yes, I'd be happy with what you're attempting using the NH type 00 fuses. I've just ordered some fuses made by Miro to try. They're type RG4a, with ...
The fact that it's storage isn't the salient point. G98, G99 and G100 are rules relating to devices which export to the grid. If your storage batt...
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RE: MCS certificate SCOP vs real-world performance
MCS:3.65 Reported by Vaillant: 3.96 (heating only); 3....
By JamesPa , 12 minutes ago
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I think, based on what others have said here, that the ...
By JamesPa , 24 minutes ago
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RE: Big Changes Coming to Our Heat Pump System
I'm intrigued by this exercise, so far you haven't repo...
By JamesPa , 27 minutes ago
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RE: Mitsu PAR-WT60R Wireless Controller - options
@abernyte Thank you for passing on your experience and ...
By DavidAlgarve , 2 hours ago
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RE: Powerwall 3 or Myenergi or something else?
Yes I was thinking of outdoor, IP65 batteries with buil...
By Temperature_Gradient , 3 hours ago
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RE: Help me keep the faith with my air source heat pump installation
Water pump will certainly make a hum (which could conce...
By JamesPa , 6 hours ago
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@jamespa Thanks. Yeah any adjustments Ive made at pr...
By cliffhanger , 6 hours ago
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RE: How to choose Towel Rails for an ASHP
@rob-nezard yes absolutely. Here is the link and a pho...
By GrahamF , 2 days ago
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@mixergy Thanks for the update, I would appreciate some...
By bontwoody , 2 days ago
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RE: Is Your Broadband Router the Weak Link in Your High-Tech Home?
Unfortunately I'm not that well connected 😂 ...
By Scalextrix , 2 days ago
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RE: A Customer's Lessons Learnt from a Heat Pump Installation in a Large House
It is interesting to see what our new Grant Aerona 290 ...
By GrahamF , 2 days ago
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RE: Testing new controls/monitoring for Midea Clone ASHP
I've never physically seen it, but I seem to recall som...
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RE: Midea ASHP – how to set weather compensation
I noticed that too and thought the same thing, but then...
By cathodeRay , 3 days ago
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RE: Ya can’t win! It is S*d’s Law!
@old_scientist If IOF is still running next late spring...
By Toodles , 3 days ago
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RE: Electricity price predictions
Those of you on Agile will do well tomorrow; there are ...
By Toodles , 3 days ago
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RE: Who’s Caved and Switched the Heating On Already?
We've been running our Ecodan system, installed in June...
By Sheriff Fatman , 3 days ago
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Ok. Two schools of thought. The first is to run the ...
By JamesPa , 4 days ago
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@drei Willing as I am to help, I don't think I'm yet ...
By JamesPa , 4 days ago
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Selling 5 year old ASHP & Gas Combi Boiler - £590
Selling a 5-year-old Daikin Altherma Hybrid Air Source ...
By Paul G , 4 days ago