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Last seen: Aug 1, 2026
Sim0n0 JamesPa Thank you.
JamesPa You will be please to know that this afternoon WE made the DIL switch change to give us a 2C Thermo OFF time. The change was easy, but stress...
The Thermo Off (not Thermal Off) only relates to the latest SW installed by Hitachi. To change the Thermo Off setting you have to go into the control...
@jamespa The new sw was to prevent rapid short cycles which we were seeing every 3 to 5 minutes. BTW. Heating ticking away at 50% Night Setting. N...
I could do the change, I do have an electronics background. But due to health reasons, I am just not confident in doing such things. He does have t...
@jamespa No its a chargeable visit. So be at least £200.
@jamespa I have good news. I now have the instructions for: Thermo Off. This can be changed to 2C or OFF. I think I will go with the 2C option....
@jamespa Looking at setting up the weather compensation. I know from the building that 32C is fine for temperatures below 0C and 5C. But don’t k...
JamesPa Below is the plot of yesterdays run (30 Nov). Surprise NO THERMO OFFS. Ran for 10.5 hours. Im afraid it's a fluke!!! I have always expre...
JamesPa. Thats one thing that I do have right. Cross that one off the list.
You always challenge my thinking! I don't specifically know why I think it's too long. My only thought is do other systems/users have that long time...
JamesPa Just for information 29th Nov run. Nothing really new, except that these Thermo Off periods are way tooooo long at 1hr 20 mins and 2hrs 20 mi...
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Degrees of Separation
Latest Posts
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RE: To re-pipe or not to re-pipe? Moving from oil boiler to air source heat pump.
@penval, really useful update. After all the discussion...
By Mars , 35 minutes ago
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RE: Who's your electricity provider and what's your tariff?
@papahuhu I prefer to look at it simplistically. We d...
By Old_Scientist , 22 hours ago
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RE: How Accurate Is My DIY Heat Loss Calculation?
D'oh - of course. I shouldn't post before my brain is f...
By Old_Scientist , 1 day ago
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RE: Questions about A2A for heating as well as cooling
@rob-of-york I would concur with the underfloor insulat...
By Toodles , 1 day ago
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RE: New Vaillant Arotherm controls link to existing thermostats ; wired vs wireless
Nothing attached! I have rads but UFH makes the case ...
By JamesPa , 1 day ago
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RE: Cooling with air to water heat pumps
Passive cooling should always be the first call. Keep ...
By JamesPa , 1 day ago
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RE: Do I add Air Con or MVHR to existing A2W ASHP?
@rob-of-york Thank you, I’m thinking along these same l...
By Toodles , 2 days ago
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@Mars Good questions! The downstairs unit did the maj...
By Rob of York , 2 days ago
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RE: Volumisers in Heat Pump Systems: Does Placement Matter?
@dave, I think @jamespa has probably identified the mos...
By Mars , 3 days ago
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RE: Plug and play solar. Thoughts?
My thought is simple. Bring it on and bring on plug in...
By JamesPa , 3 days ago
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RE: Heat Geek mini store vs pump size
Yes I agree, that’s why Heat Geek have most likely sele...
By Tomtheheatingengineer , 4 days ago
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@tomtheheatingengineer, thank you, and welcome to the f...
By Mars , 4 days ago
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
@majordennisbloodnok @tomtheheatingengineer For my ...
By JamesPa , 4 days ago
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RE: Is the "divide by 2900" rule still valid?
Really flow rate is a pipework limitation not a water p...
By JamesPa , 5 days ago
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