View Profile: bruce_miranda - Automated Home Forums

19th February 2019, 11:38 PM

bruce_miranda replied to a thread HR92 vs Tado motor volume? in Heating Control

Nest was in the news recently for exactly the same reason. Their cloud service went down and people woke up to cold houses.

7 replies | 341 view(s)

19th February 2019, 11:35 PM

bruce_miranda replied to a thread UFH - EvoHome and reluctant plumber in Heating Control

if the entire manifold is serving one heating zone, then electric actuators are completely unnecessary. They are only needed if individual runs are...

12 replies | 630 view(s)

19th February 2019, 12:16 PM

bruce_miranda replied to a thread UFH - EvoHome and reluctant plumber in Heating Control

Most manifolds won't come with electric actuators. So it gets simpler. You just wire the BDR91 to open the zone valve feeding the manifold, that in...

12 replies | 630 view(s)

11th February 2019, 09:06 AM

bruce_miranda replied to a thread Viessmann / Honeywell OpenTherm issue in Heating Control

Yes that will work, but that adds another link to the chain. You need to then send the Max Flow temperature OT command to the Viessmann.

5 replies | 418 view(s)

10th February 2019, 09:53 PM

bruce_miranda replied to a thread Viessmann / Honeywell OpenTherm issue in Heating Control

Viessmann with Honeywell OT will make your boiler reach for the lofty highs of 85+°C. I don't think you want that. Go back to using a BDR91 as your...

5 replies | 418 view(s)

10th February 2019, 01:57 PM

bruce_miranda replied to a thread Vaillant 831 Eco Tec Plus combi with open therm in Heating Control

Do you have an indication to know what the current heat output is? I was only able to derive this once I was monitoring the eBUS.

18 replies | 628 view(s)

10th February 2019, 01:28 PM

bruce_miranda replied to a thread Vaillant 831 Eco Tec Plus combi with open therm in Heating Control

In my case, my boiler was specced too large. My Alpha2 pump and the 22mm heating loop are not man enough to take the heat away from the boiler fast...

18 replies | 628 view(s)

10th February 2019, 11:19 AM

bruce_miranda replied to a thread UFH - EvoHome and reluctant plumber in Heating Control

You don't even need to invest in electronic actuators. Just leave the manifold manual ones on. As long as each circuit run is about the same length...

12 replies | 630 view(s)

10th February 2019, 11:14 AM

bruce_miranda replied to a thread Vaillant 831 Eco Tec Plus combi with open therm in Heating Control

I have a 438 which doesn't have the Auto KW setting. I have the boiler set to 18KW max. And most of the time it never uses that. To my pleasant...

18 replies | 628 view(s)

7th February 2019, 12:52 PM

bruce_miranda replied to a thread HR92's: A rant in Heating Control

I always thought that doing away with the grill on the HR80 behind which is the temperature probe, was a step backwards on the HR92. I have used...

30 replies | 4571 view(s)

4th February 2019, 05:03 PM

bruce_miranda replied to a thread Evohome : All Room Setting in Heating Control

I too have a custom quick action that takes all rooms to 25C. Not that I ever want it to get there. I also comes handy when you need the system...

5 replies | 345 view(s)

4th February 2019, 12:26 PM

bruce_miranda replied to a thread How to read the Vaillant eBus in Heating Control

I can confirm that the Arduino circuit mentioned above works absolutely fine. But is READ only. So you will get the ebus data. You will still need...

21 replies | 1350 view(s)

1st February 2019, 08:54 PM

bruce_miranda replied to a thread EvoHome with a single HR92 radiator thermostat in Heating Control

You can absolutely do this. But then you've just bought a very expensive room thermostat.

3 replies | 268 view(s)

27th January 2019, 03:47 PM

bruce_miranda replied to a thread Hacking modulating boilers with fake outdoor sensor in Heating Control

Once you can listen to the Evohome messages, the zone valve devices already have the Heat demand aggregated according to the Honeywell algorithms.

9 replies | 605 view(s)

26th January 2019, 10:44 AM

bruce_miranda replied to a thread Advice on Boiler efficiency in Heating Control

Whenever you run the boiler, the created heat has to go somewhere. So you need to decide, it either goes into the tank, the radiators or infact cycle...

3 replies | 259 view(s)

24th January 2019, 10:46 PM

bruce_miranda replied to a thread Advice on Boiler efficiency in Heating Control

The answer to this question is going to be how cold the HW tank is before the HW cycle and how fast you want it to heat up.

3 replies | 259 view(s)

24th January 2019, 10:43 PM

bruce_miranda replied to a thread Hacking modulating boilers with fake outdoor sensor in Heating Control

does your boiler support any kind of integration. I have done what you are setting out to do. I.e. fool the boiler with an external temperature...

9 replies | 605 view(s)