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Last seen: Apr 29, 2025
@derek-m Testing Grundfos motors I have connected a Pulse generator to find out if one of my GRUNDFOS motors is working. I varied the Pulse width ...
@iancalderbank Hi Ian, Your system seems a lot more up to date than mine. My Grundfos motors still has LEDs .which do not show that the PWM sys...
@iancalderbank I know , Ian, I am confused myself......... So here is latest on the PWM sage......... My Grundfos motors work under PWM when fe...
@iancalderbank Hi Ian More revelations about the Grundfos PWM Motors! I have connected my oscillator (to the Brown(Sig) and blue(Ref)) wires an...
@iancalderbank Hi ian, In frustration I have connected a Wave generator only to discover that you are right. The Wiring shown in the manuals is w...
@dandee Many thanks ......again I am astonished with the information about the SIG and REF inputs............. specifically , How have you connec...
@iancalderbank Hi Ian. Following my trumpeting of my apparent success in correcting the losses in my heat pump I have to admit that the supposed ...
Hi Graham, Believe it or not but I agree with you ! Having looked over the last year at the poor , incompetent , support I have had from my "insta...
@william1066 THE PWMI have finally got a "hopefully working PWM Motor controlling the Motor Speed to control the Water Heat Power. The Critical p...
@mike-h PWM Signals producing E912 errors when Not in use! I have been recording the PWM Signals presented to my GRUNDFOSS MOTORS. When supplying ...
@mike-h World record for Hyper-Cycling! Have a look at my Hyper-Cycling SAMSUNG HEAT PUMP. I make it 94 cycles in one day! Can anyone ...
Sorry William, I found the PWM Flow rate on page 58 of my new manual. Many thanks also to Graham , the new version of the manual at 208 pages is inf...
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread
To be fair to Octopus customers, it would be better if ...
By AndrewJ , 5 hours ago
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RE: Seeking ideas / information / commiseration - Pure Drive
Most of the times whole house backup can't work without...
By bobflux , 5 hours ago
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RE: Home energy storage & battery register
AC coupled Pure Drive 10kW battery Solar PV Solis P...
By Little Lights , 8 hours ago
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RE: Rate the quality of your heat pump design and installation
@claireisamazing, that’s got to be one of the most posi...
By Mars , 8 hours ago
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Got myself in a pickle. I have two types of plugs, but ...
By David999 , 8 hours ago
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@jamespa Great, thanks - I've had a quick look at the a...
By Little Lights , 10 hours ago
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RE: Air source heat pump roll call – what heat pump brand and model do you have?
Forum Handle: ispookie666 Manufacturer: Vaillant Mo...
By ispookie666 , 11 hours ago
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RE: A2A vs A2W: Which Heat Pump Would You Pick?
I'm fairly new to the forum and have not voted. Back...
By ispookie666 , 11 hours ago
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I am seeing an increasing number of occasions when my G...
By DavidAlgarve , 12 hours ago
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@transparent I have been a little reluctant to select "...
By DavidAlgarve , 12 hours ago
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RE: End-of-Life Heat Pumps: How Do You Dispose of an ASHP in the UK?
@editor Thanks Mars. I look forward to the subsequent ...
By DavidB , 17 hours ago
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RE: Anyone concerned about GivEnergy?
Fair enough. Its interesting that opentherm (for boil...
By JamesPa , 18 hours ago
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RE: Brand and installer questions for ASHP
A tank solely in the return (upstream of where the retu...
By JamesPa , 18 hours ago
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RE: UK DIY Battery: SEPLOS 48V 200Ah x2 + Sunsynk 8K – Safe Installation for Garage Conversion
thank you to all who have already replied. I have been...
By madsid , 19 hours ago
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RE: Home automation and the cloud; is there a better way?
+1 It's not just cloud though. Many devices have repla...
By bobflux , 1 day ago
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RE: Summer usage. Why is my Vaillant Aerotherm using so much energy on "heating"?
So the red bars are 'DHW' and the yellow bars 'heating'...
By JamesPa , 2 days ago
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RE: Indevolt Batteries UK Support & Info Thread
Have you tried cutting the grid feed to see what actual...
By JamesPa , 2 days ago
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Contractors pack for inta antifreeze valves are around ...
By ASHP-BOBBA , 2 days ago
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RE: Renewables & Heat Pumps in the News
Critics and naysayers will be negative whatever the gov...
By JamesPa , 2 days ago
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RE: Microbore heat pump installs
In principle you are almost certainly right, but in pra...
By JamesPa , 2 days ago
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RE: Electricity price predictions
@old_scientist We are a low mileage home, so bulk of ou...
By ChandyKris , 2 days ago
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RE: What is the main ‘dictator’ of Agile’s unit price?
@toodles I keep an eye on wholesale prices and energy m...
By ChandyKris , 2 days ago
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RE: Upgrading my system, how far do I go?
For comparison, my PW3 with 11.04kW inverter, will char...
By Old_Scientist , 3 days ago
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RE: Changes to Tesla Powerwall Charging Regime?
Elon gate - legendary! I take my hat off to you @toodle...
By Old_Scientist , 3 days ago


