Indirect Unvented cylinder, Combi Boiler and Nest Thermostat

[Bibbs118]

Will put it this way

Does it say not to install one in combination with an unvented cylinder no it doesn't


Not everything is in the manufacturers instructions

This is why I did write, ring them an ask for a drawing, no drawing and you can not be following MIs, and the instructions ALWAYS say MUST BE INSTALLED TO MANUFACTURERS INSTRUCTIONS.

AND NEVER SAY, unless you think you know better.

 

[ShaunCorbs]

I give up

@Harvest Fields @townfanjon @Best @sammathias @hammers4spanner @Riley @jtsplumbing

Am I wrong again ?

 

[Bibbs118]

I give up

@Harvest Fields @townfanjon @Best @sammathias @hammers4spanner @Riley @jtsplumbing

Am I wrong again ?

Yes or no?

Do you have to install to MIs?

 

[Harvest Fields]

Why it's just another heat load prividing you have a draw off eg a tap off the combi your fine

I have a regular customer who has moved house to a house with a Vaillant combi on a Vaillant unvented cylinder. He had me in to have a look but as Shaun has this this ones hot supply has just been capped off. So I am going to run a short run of pipe and a hot tap to the garage or inside the utility.

 

[Harvest Fields]

I give up

@Harvest Fields @townfanjon @Best @sammathias @hammers4spanner @Riley @jtsplumbing

Am I wrong again ?

I’m with you mate. Next he will be saying you cannot Zone a heating circuit? No difference between another zone and a zone for the cylinder. Seen it done loads. Would make sure it has a hot water draw off though. I spoke to Vaillant on the one my customer has as there is loads of work needed and they said just fix the issues and make sure it has a hot water draw off. I’m happy with that.

 

[Harvest Fields]

Yes or no?

Do you have to install to MIs?

I’m sure there is nothing in the Vaillant manual that shows you how to pipe in 2 zones for a larger house yet Vaillant say you can fit their 938 into a 4 bed semi with a bathroom and ensuite. So does that mean on a new build you would put the whole system on one zone? @Bibbs118

 

[Bibbs118]

Look, you are missing the point, one, seeing it done loads does not mean it's OK, two, vaillant will have a drawing for an s plan plus, three, doing it so it's safe in your mind is not the same as installing to MIs.

And four. Yes or No, do you have to install to MIs?????

If there is no instructions then how can you follow them, this is why I did say, get a drawing from the manufacturers .

 

[hammers4spanner]

You can put a combi on unvented have seen it done numourous times . One hot draw off to utility basin in most cases.

Even done a greenstar with a worcester enginger couple year ago.
If anyone would know about their product they would.

As said another heat source.

 

[Harvest Fields]

Look, you are missing the point, one, seeing it done loads does not mean it's OK, two, vaillant will have a drawing for an s plan plus, three, doing it so it's safe in your mind is not the same as installing to MIs.

And four. Yes or No, do you have to install to MIs?????

If there is no instructions then how can you follow them, this is why I did say, get a drawing from the manufacturers .

You’ve answered you own question. If they have a schematic for an s plan then yes you can.

 

[Bibbs118]

You can put a combi on unvented have seen it done numourous times . One hot draw off to utility basin in most cases.

Even done a greenstar with a worcester enginger couple year ago.
If anyone would know about their product they would.

As said another heat source.

Please re read what put. Seeing it loads off times does not meant it's OK, this is why I did say get a drawing.

And , s plan zones don't require temp and pressure relief of or a temp cut off do they? So not the same .

 

[Bibbs118]

Yes or no, do you have to install to MIs?

 

[ShaunCorbs]

Ffs 😱

 

[Harvest Fields]

Think we have to just disagree on this one @ShaunCorbs 😀😀😀@Bibbs118. I trust what Vaillant told me and that’s that.

 

[Harvest Fields]

Please re read what put. Seeing it loads off times does not meant it's OK, this is why I did say get a drawing.

And , s plan zones don't require temp and pressure relief of or a temp cut off do they? So not the same .

No idea what world you live in though mate.

 

[Bibbs118]

Think we have to just disagree on this one @ShaunCorbs 😀😀😀@Bibbs118. I trust what Vaillant told me and that’s that.

Being told something is not the same has following the MIs, what am saying is, if you can't get a drawing then it's not ok .

Because it's impossible to follow MIs without having the MIs .


Just ask yourself the yes or no question and the answer will tell you what I'm saying is correct .

Do you have to install to MIs? Yes or NO

 

[Harvest Fields]

Being told something is not the same has following the MIs, what am saying is, if you can't get a drawing then it's not ok .

Because it's impossible to follow MIs without having the MIs .

If the manufacture say it is ok. And they warrant the job for 10 years then it is ok. But for future reference I will make sure they email me confirmation.😛😛 On that not I’m done. I will not be commenting again.

 

[Bibbs118]

If the manufacture say it is ok. And they warrant the job for 10 years then it is ok. But for future reference I will make sure they email me confirmation.😛😛 On that not I’m done. I will not be commenting again.

That's totally correct, you need confirmation.

 

[Harvest Fields]

That's totally correct, you need confirmation.

I was being sarcastic. 😀😀 But honestly I’m done now

 

[hammers4spanner]

Re read what I wrote.

I have done this with a worcester engineer employed by worcester.
It is acceptable.

 

[townfanjon]

Just come in on this one , will read it all later , just back off holiday, FFS phones going mad .