Hot water cylinder smart thermostat

[Michael Groves]

I’m looking for a Hot Water Cylinder Smart Thermostat. But I want to be able to monitor the tank temperature over time so I can see when the hot water is being drawn off and how quickly it recovers. So maybe recording the temperature every 5 minutes and saving this data.

Does such a thing exist?

 

[Michael Groves]

I asked my plumber about servicing cylinder, he was hell yeah, you need to check this n that and that n this. Made sense having spoken to him. He said look at back of booklet got with cylinder, need to dig this out.
I also took a photo

 

[Riley]

Looks to need some D1 discharge reposing as it’s not to spec

 

[Michael Groves]

What does that mean, I asume 3 no. 15mm into 1 no. 22mm does not comply, am I correct, if so why not?

 

[Riley]

500mm max before it passes through tundish

 

[Michael Groves]

500mm max before it passes through tundish

Tundish is behind immersion heater, zoom in, you can just see bottom below immersion. I’ll measure runs. But otherwise is it okay?

 

[Riley]

Difficult to say without being there. Certainly D1, no insulation. Might be more

 

[Harvest Fields]

G3 advice on an open thread? You need your G3 engineer on site to look at this properly mate.

 

[Michael Groves]

No worries, I’ll ask him to review.
Thanks for heads up.

 

[ShaunCorbs]

Them esi stats are a pain check your cylinder temp is correct eg hot water temp 60 - 65 Dc stored

 

[chris watkins]

500mm max before it passes through tundish

600mm now & has been since they went with the re-assessment.
Michael check out MI's or otherwise Building Reg's AD PartG3 page 24
https://assets.publishing.service.g...207/BR_PDF_AD_G_2015_with_2016_amendments.pdf

 

[chris watkins]

No worries, I’ll ask him to review.
Thanks for heads up.

More importantly Michael from what I can make out from your photo you have a Grundfos AutoAdapt Comfort 15-14BA PM secondary hot water circulator installed, & from what I can see, the sensor has been fitted to the return pipe not the flow out of the cylinder so the pump can't learn your usage pattens & maybe running all the time. Along with the fact that there is no insulation fitted to the pipework this will be wasting lots of energy (gas) & I believe that was why you originally posted.
Please check it out & let us know.

PS. it is a requirement under the Building Regs that the hot (flow & return) pipes are insulated.

 

[Riley]

I tell you what Chris thanks. I even knew that but doubted myself and the first pic of dimensions I googled was wrong

 

[Riley]

Damn google

 

[Michael Groves]

600mm now & has been since they went with the re-assessment.
Michael check out MI's or otherwise Building Reg's AD PartG3 page 24
https://assets.publishing.service.g...207/BR_PDF_AD_G_2015_with_2016_amendments.pdf

Thanks for link, I’ll get tape measure out on Friday when I am there, I think it’s okay, but I will confirm. I’ll also dig out MI while I’m there.

 

[Harvest Fields]

Thanks for link, I’ll get tape measure out on Friday when I am there, I think it’s okay, but I will confirm. I’ll also dig out MI while I’m there.

Is this a rented property?

 

[Michael Groves]

More importantly Michael from what I can make out from your photo you have a Grundfos AutoAdapt Comfort 15-14BA PM secondary hot water circulator installed, & from what I can see, the sensor has been fitted to the return pipe not the flow out of the cylinder so the pump can't learn your usage pattens & maybe running all the time. Along with the fact that there is no insulation fitted to the pipework this will be wasting lots of energy (gas) & I believe that was why you originally posted.
Please check it out & let us know.

PS. it is a requirement under the Building Regs that the hot (flow & return) pipes are insulated.

You have a keen eye sir, unfortunately I can’t blame plumber for Grundfos sensor. Original Grundfos did not have sensor. It only lasted 6 months and failed. It was replaced under warranty, but they no longer made the basic model so sent one with sensor. I swapped it as it was straight forward. It’s still runs 24/7, when I did the maths, the extra money for the more expensive pump had a pay back of 10 years. That’s why I went for cheaper one initially. However, when I got top pump for no extra money I reviewed again. I spoke with Grundfos in case I was missing anything, but we came to same conclusion. Because usage is sporadic autoadapt won’t work. So it’s left running 24/7. The sensor is just clipped out the way.

All pipe runs have been insulated with the fattest pipe insulation I could get. The only pipe not insulated are what you can see. It’s been left off so I can paint first. But, I wish plumber had used spacers so I could get thicker insulation on.

On that note, I’ve been meaning to post this question for ages, there is a noticeable temperature drop the further you get away from the cylinder. Assuming we are only talking about secondary return, there is only 2M of uninsulated pipe on the whole run. I fully expect a drop, but it just seems too much. Everything is Hep2o other than what you see.
What else can I do?

 

[Riley]

Secondary I don’t believe can be plastic

 

[chris watkins]

The flow should be 60 - 65 & the return at the cylinder no less than 50. However good the insulation you will still have standing losses of the cylinder & the pipework.
You may wish to speak to the manufacturers of the pipe as I believe the warrantee will be void if you use it in a secondary circulation circuit especially one that runs continually.
PS. you should of specifier clip spacers to suit the lagging 😳
Good luck Michael

 

[Michael Groves]

The flow should be 60 - 65 & the return at the cylinder no less than 50. However good the insulation you will still have standing losses of the cylinder & the pipework.
You may wish to speak to the manufacturers of the pipe as I believe the warrantee will be void if you use it in a secondary circulation circuit especially one that runs continually.
PS. you should of specifier clip spacers to suit the lagging 😳
Good luck Michael

I’ll check temp when I’m next there. Just to be clear, are you saying customer should have asked for spacers?

 

[chris watkins]

Yes, most standard plastic pipe clips will just about allow 13mm wall thickness insulation to be fitted around the pipe if you wanted the insulation to be thicker then you needed to spec it or let then know that was your intension.