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Last seen: Sep 6, 2026
Grant couldn't make it any simpler(!) ... or not ... Go to the Controller, and open up the flap: Press 3 buttons at the same time: the one that lo...
So far as I understand it, pressing the up/down has no effect (other than to change the number being shown). In the installation guide: "Please note...
I wouldn't take the cover off the EP001 - just trace where those 4 white electric cables are going to. At least one will be carrying the control signa...
This will be my first winter with my HP, and it currently seems to be struggling ... it's been trying for 3 hours to hit the target LWT for 0°C (46.5)...
Looking at your first picture, showing the HW cylinder, you can see (from the top) the HW Timer and Thermostat (these are controlling the DHW times), ...
It's hard to tell. Having the Chofu controller in the airing boiler room is generally where they are placed - and as such, the "internal temperature" ...
@derek-m I'm trying to get decent data out of my Grant Aerona over modbus too. Sadly, it also provides low resolution data; key values such as LWT and...
Your display is confusing to see on a Grant controller. The symbols you have highlighted ('On' means a Timer program is currently running; the clock s...
Attached as a PDF is anybody fancies a read.
The standard advice is to only vary settings by a maximum of 2C throughout the day e.g. 20C when you're at home, 18C overnight, and 19C during daytime...
I have a Grant, and the DHW timer sounds similar to yours (they are less than user-friendly), but you can check what the HP is trying to do by looking...
It's being varied by the controller's WC - see below where I've just shown the 'Target LWT' vs OAT (and compressor freq) for that same time period; th...
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Degrees of Separation
Latest Posts
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RE: Vaillant Arotherm – Using Heating
@jamespa the same here: 5.4kWh in August.
By L8Again , 5 minutes ago
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RE: Is it the house or the equipment?
@rob-of-york More worthwhile options to consider. Th...
By springswood , 2 hours ago
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RE: Who's your electricity provider and what's your tariff?
Switch to Cosy 12 month fixed initiated - just waiting ...
By Old_Scientist , 8 hours ago
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RE: Next steps on my ASHP journey: Radiators and Pipework
If you have a flowmeter and two temperature probes, the...
By bobflux , 9 hours ago
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RE: Starting Our Heat Pump Journey: 1962 build 3 bed detached house
@ian-s One interesting difference between your two q...
By Rob of York , 14 hours ago
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RE: Siting of the external sensor on a heatpump
@jamespa Absolutely. Even if the same mistake was mad...
By Batpred , 16 hours ago
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RE: Recommendations in Ely (Cambs) area for Full setup checks on Nibe HP setup for House.
In fairness all heating has cost a lot to run in recent...
By JamesPa , 2 days ago
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RE: Navigating the World of Refrigerants In Heat Pumps: A Guide for Homeowners
Indeed we are invvestigating AC at present and are havi...
By Toodles , 3 days ago
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No, but the heat pump must be capable of delivering a S...
By JamesPa , 3 days ago
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RE: Daikin ESPAltherma and Home Assistant installation
It's laziness lol The PV system is very chatty, meter...
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RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S
R (The R Project for Statistical Computing, I use it wi...
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RE: Vaillant Arotherm Plus 7KW need a service on it
booked it with Vaillant. will use them until i can find...
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RE: Adventures in heat loss calculations
I have seen it stated that the declared calorific value...
By JamesPa , 4 days ago
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