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Home heating automation
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Does anyone know of something that'll do this?
If you have cabling in place or can put it in place, Velbus should be able to do it. Check out the video above.
It basically replaces the boiler controller and lets you add any amount of zones to it including the immersion.
Their glass-panel is the temperature probe in the zone, but also the control element, where you set the temperature etc.
To control the immersion, they have a module called VMB4AN, that will take up to 4 temperature probes. One that should be compatible with the VMB4AN (to use on the immersion) would be something like this: https://www.omniinstruments.co.uk/temperature-and-humidity/surface-mount-and-pipe-mount-temperature-sensors/tt-351-strap-on-temperature-sensor.html
That's the system I'm currently looking at to replace my 1ch boiler controller, 4 zones that are wired god knows how in behind it without properly being able to call for heat and no heat control on the immersion at all.
The guys in the UK selling the system are fairly knowledgable and also vested in OpenHAB. So they would able to give you advise.
/M0 -
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If you have cabling in place or can put it in place, Velbus should be able to do it. Check out the video above.
It basically replaces the boiler controller and lets you add any amount of zones to it including the immersion.
Their glass-panel is the temperature probe in the zone, but also the control element, where you set the temperature etc.
To control the immersion, they have a module called VMB4AN, that will take up to 4 temperature probes. One that should be compatible with the VMB4AN (to use on the immersion) would be something like this: https://www.omniinstruments.co.uk/temperature-and-humidity/surface-mount-and-pipe-mount-temperature-sensors/tt-351-strap-on-temperature-sensor.html
That's the system I'm currently looking at to replace my 1ch boiler controller, 4 zones that are wired god knows how in behind it without properly being able to call for heat and no heat control on the immersion at all.
The guys in the UK selling the system are fairly knowledgable and also vested in OpenHAB. So they would able to give you advise.
/M
Cheers. I'll have a look through the video when I can. I'm reluctant to commit to Fritz! routers though. Despite the fact that I have one and accept your point that I can always get a cheap one for managing things
. I use home-assistant at the moment but could spin up an OpenHAB docker image to test it out. I've nothing in HA that would stop me jumping ship to something else.
I have been debating a similar set up for the immersion with the Shelly relay. They have a temperature probe sensor addon that I could potentially mount on an exposed section of the tank. Ideally I'd like to be able to click a button (on a web page) that would ensure there's enough hot water for a shower. That might take some tinkering, but I don't think I'll find an off-the-shelf option. Tank is well insulated but there's exposed parts for piping near the top and bottom. Hopefully I would find that if the sensor reads X degrees, it's probable that there's enough hot water to last the length of a shower.
Ideally I'll do a bigger job on the house in a few years and update the heating at the same time so I guess I need something with a low initial cost outlay and also expandable in the future.0 -
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Thanks for that. I've pulled back on the heating automation again because the price of the tado has gone back up and have to fix that immersion first :pac:. I'm not in a rush with it so can keep an eye out for bargains.You can use the app without a subscription. If you get the Tado stat with the extension kit, you can position the stat wirelessy, so no cabling.
The extension kit will give two switched live outputs (or one volt free SPDT). The SL outputs are CH and HW. The HW output can be used, via a relay, to time your immersion. (did you get it fixed?). Alternatively, the ext kit can be set up in gravity mode to fire the boiler from one output and the circulation pump from the other to give CH and HW, or HW only, if your system is wired accordingly and the HW is gravity fed.
To prevent HW leeching to upstairs rads, your plumber can fit a non return valve on the upstairs CH flow. This will only open under pressure from the pump, but not by gravity.
If you have HW separately from your oil boiler, it will be much less expensive than immersion top ups.
Also consider the Nest stat with it's two output relay box for your system
Regarding the HW leeching, ASAIK we don't have any pump in the system and it's all gravity fed. Does that mean the non-returning valve set up wouldn't work? At the moment I just manually close the valve during the summer, but it usually takes me a while to remember to do it
I'll have a look a the Nest and see. Would prefer to avoid Google hardware if I can though0 -
It would be highly unlikely to have an oil fired boiler without a circulation pump. To heat ground floor radiators by gravity would require a large bore flow pipe under the radiators but above top outlet of the boiler, or else top fed radiators.Thanks for that. I've pulled back on the heating automation again because the price of the tado has gone back up and have to fix that immersion first :pac:. I'm not in a rush with it so can keep an eye out for bargains.
Regarding the HW leeching, ASAIK we don't have any pump in the system and it's all gravity fed. Does that mean the non-returning valve set up wouldn't work? At the moment I just manually close the valve during the summer, but it usually takes me a while to remember to do it
I'll have a look a the Nest and see. Would prefer to avoid Google hardware if I can though
This Drayton 2 ZONE kit is equivalent to a Tado plus ext kit. https://www.screwfix.ie/p/drayton-heating-2-channel-wiser-thermostat-control-kit/9575v0 -
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Those of you using HA, how have you implemented heating scheduling?
At the start I found this to be one of the biggest hurdles, simply using the automations was not intuitive enough for others in the house.
This is my current scheduler:
Heating Schedule by Emaherx, on Flickr
My Main Central heating tab:
Heating Master by Emaherx, on Flickr
Heating zones
Room Temp by Emaherx, on Flickr
Hot water Zone with solar and Immersion
HW Temp by Emaherx, on Flickr
Graphs, useful for monitoring system performance
Heating Graph by Emaherx, on Flickr 0 -
Those of you using HA, how have you implemented heating scheduling?
At the start I found this to be one of the biggest hurdles, simply using the automations was not intuitive enough for others in the house.
This is my current scheduler:Heating Schedule by Emaherx, on Flickr
My Main Central heating tab:Heating Master by Emaherx, on Flickr
Heating zonesRoom Temp by Emaherx, on Flickr
Hot water Zone with solar and ImmersionHW Temp by Emaherx, on Flickr
Graphs, useful for monitoring system performanceHeating Graph by Emaherx, on Flickr
What hardware is that controlling?0 -
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