OpenTherm with Multiple nests on underfloor heating

[Dan Robinson]

So what system do you have?

Shambo's setup is an ideal Vogue, not sure what controller it is, probably an oem one.

 

[shambolic]

I have a big red button that says ON. Pushed it 3 years ago. Don't touch anything else

 

[Dan Robinson]

In all seriousness, my bigger jobs now we don't bother with Hot Water timing. There is an on/off button in the boiler. Balls to giving people more things to touch and break.

 

[Agile]

I would still fit a hot water timer on systems with a cylinder to cater for those who are disturbed by a boiler working during the night.

There was one boiler maker who made a combi with always on hot water preheat. I expect more than one installer has had to change one of them for the sensitive sleepers.

 

[DP]

I would still fit a hot water timer on systems with a cylinder to cater for those who are disturbed by a boiler working during the night.

In all seriousness, the loss from a UV cylinder is so small, not having a timer does not mean the boiler will be cycling. If there is tiny little bit of heat loss, thermostat hysteresis will most likely not result in boiler firing through the night.

 

[Dan Robinson]

Indeed it doesn't - my data logging for the last year has demonstrated that, hence my stance.

Besides, most of the places I install in have the boiler and cylinder far enough away from any living area and, of course being the mighty Gash run mostly silent anyway.

I am sitting 3 feet away from mine at the moment and can't hear it even though it is going like the clappers reheating the cylinder as SWMBO runs her bath.

In fact - the water running through the safety group of the cylinder makes more noise.

 

[Razor900]

I'm curious, I usually set the flow temp for a UFH only system to around 45 degrees. Would OT make that much of a difference to the running costs?

 

[Dan Robinson]

Allows for the highest load on mixed emitters to compensate. When I'm doing my Eco's with inTouch weather comp, I set the curve to the rads and have a GFA to limit the ufh to design flows to cope with the winter.

If i was using an HM80 the OT would work hand in hand with the rads and whatnot.
Moot point with the Mighty Gash though .

 

[Razor900]

That makes sense Dan.

All your prayers may be answered very soon now. There's some serious engineer training going on next month

PS In a few months time you may be thinking that your ECO isn't so quiet after all

 

[Dan Robinson]

I need to talk to Dave or Mark - not been in spoken to the bunker in ages. Got a pair going into one house soon might be asking for a letter from my mum on badge ratings .

 

[Razor900]

Marks off til Monday but they should both be available after that

 

[picasso]

Any chance of getting in on the training ?

 

[Dan Robinson]

Any chance of getting in on the training ?

The Chelmsford branch of Plumb City have a training day on the 8th June. A morning and an Afternoon session.

 

[picasso]

Any idea how indepth the training is?

 

[Dan Robinson]

Depends on the questions I suppose. Once familiar with the boiler in a hands on way, you'd get more out of asking questions in the CC or on the Faceache group.