Vaillant EcoTec Exclusive 838 13 rads

[Deleted member 105431]

You seem to be taking a long time to understand that if your rads are a total power output of 22 kW then thats the power required from the boiler.

Oversizing the boiler means its less efficient and inclined to enter one of the waiting modes.

Tony

I have to agree with Agile. I would also recommend setting the vrt360 f to analogue mode and a setback of 17 degc. Where have you put the vrt360? The nearest rad should have two lockshields and be a sensible distance away. As mickyg has asked was the system working perfectly prior to the new boiler? Try resctricing the bypass down too.

Why isn't the installer sorting this all out btw?

 

[Doctorflip]

the rads and boiler are all new, the house has had no other system for compsrison

 

[Deleted member 105431]

the rads and boiler are all new, the house has had no other system for compsrison

and what is your "gas safe" engineer doing about the problem?

 

[gas4you]

I'm sure you must have come across these exclusives faulting like this DM,
when you used to work for group service?

 

[Deleted member 105431]

I'm sure you must have come across these exclusives faulting like this DM,
when you used to work for group service?

Only problems with them was the modulating pump filling up with crap, otherwise very reliable tbh.

 

[Doctorflip]

Regarding flow and return

Boiler started from overun 43 flow and return

it went up incrementally ( 67/49 68/50 etc) with 70 degree flow and 52 return.

This went up to max 70 flow 59 return and the boiler ran for 30 mins before overun at 70 flow 59 return.

This is the best peformance yet with settings 30KW bypass at max 350mb pump 100% anti cycle at 20 mins

The house is heating up much faster now - so is this efficiient considering previous messages

By the way what is the relevance of the analogue mode on the controller

thanks

Bob

 

[Deleted member 105431]

analogue mode automatically varies the boiler flow temp in accordance with the heating load. (cold house boiler will go max temp, as target temp is being reached the flow temp will reduce to maintain an equalibrium so the heat loss will match the heat output of boiler. optimisation like this improves efficency by running the boiler on lower temps so the boiler condenses for longer; one step away from weather comp)


So Dr where is the "installer" or is this a botched diy effort?

 

[Agile]

The Doctor seems very reticent about his installer!

I would be surprised if a surgeon has time to do his own heating installation.

However, one would have thought a GP's salary would enable anyone to employ a proper professional. Of course a junior surgeon earns much less than a GP or consultant.

At least its getting better! I would still like to see the boiler output d0 reduced to about 22 kW.

DM has only been back for a short time but I hope that the Mad Mods can now see that he does have a value for the site!

Tony

 

[Doctorflip]

The control was not on analogue so I have changed this as well as the setback to 17 as dangermouse suggested. Can you explain what the setback setting actually does?

Also now it is on setback what about the other settings and what about the flow rates I posted recently are they ok?

Thanks

 

[Doctorflip]

I am a Consultant surgeon and I bought the house from a property developer who did the heating installation - I'm no longer in contact with him. He asked me what boiler I wanted and I had heard vaillant were decent so I went for one which was for bigger houses and had a good flow. The one I picked was the top of the range at the time in 2007. I simply didn't have time to get involved in this. The installation was checked as gas safe but it was not adapted to the heating system. Even the vaillant people who service it seem unsure about it.

Also I was happy to pay someone to come and sort it all out but when I rang a couple of vaillant approved companies the people I spoke to didn't seem to have any idea about this boiler or how to set it up. They said it was not worth sending someone on the course as they didn't get much call to service these models so that put me off. I've had more sense on here than anywhere.

 

[Agile]

Thats not at all surprising unfortunately. Property developers will get the cheapest plumber to fit something but dont want to pay for a proper professional who knows what he is doing.

As you have found out, diagnosing a problem when there are several variables is not easy. Unlike surgery where you have a pretty good idea of what you are going to do when you start, in these cases its often a matter of starting with likely settings and then seeing what effect they have on the operation and then fine tuning them. The employed engineers are just to fix faults inside the boiler, not system problems. Independents just dont have the time to spend on setting up something like yours because they mostly dont have the knowledge and even if they did they know the customer will not want to pay them for the time and number of visits it might take.

Your flow/return temperatures dont give me much cause for concern and you have already said its a lot better then before.

On a forum like this you can get free advice from some of the countries best experts. Its a pity thats not available for medical problems. What surgery do you specialise in?

Tony

 

[Deleted member 105431]

set back is the "off" temperature and the analogue mode will greatly reduce the cycling of your boiler.

As long as your house is warm when reqd the temp of the radiators is (almost) irrelevant as the boiler and the vrt360 will constantly adjust them.

Where abouts do you live Dr?

 

[Deleted member 105431]

Dr can I suggest for all this expert advice you have received you make a donation to "help for heroes" being as yesterday was rememberance day?

 

[Doctorflip]

absolutely, great idea - thanks everyone for your expert help

 

[Deleted member 105431]

absolutely, great idea - thanks everyone for your expert help

your welcome, come back if you need further help.