- Joined
- 21 Oct 2021
- Messages
- 26
- Reaction score
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- Country
So, firstly, hello one and all!
Last year I had a Vitodens 100 combi installed. So believe it must have been the B1KC model?
As is often the case, I thought I had done my homework beforehand. Which to be fair I had. But unfortunately nowhere near enough.
Everything on the whole seems fine.
However, I am now doing a bit more homework on the whole subject, and realising just how much I hadn't realised.
Such things as:
Boiler Plus requirements
Opentherm
Modulating heating loads (I never knew boilers did this!!!)
Plus- exactly what weather comp does.
When I got the boiler fitted, I went with an installer who had done a good job at my brothers place. His preference is pretty much always to fit Vaillant boilers, but I had decided on the 100W.
He wasn't keen at first, as the only one he had previously fitted ended up with a burst rubber pipe. But after all of us doing a bit more homework, we realised the offending pipe was now metal on the current model.
He put himself on the Viessmann course, and all went fine.
However as mentioned, I now realise just how much I was never told.
He was of the opinion Weather comp was a waste of time. I was in agreeance as everything the manufacturers told you about it made it sound like a complete fad. So despite I think coming with the sensor, it isn't fitted.
This forum has since taught me stuff about it that no manufacturer tells you, and I have still only touched the surface.
I also now realise nothing was ever mentioned to me about things like load modulation and Opentherm etc etc. I was of the belief the boiler just stop started as it needed to, depending on the internal temperature. So with my new found knowledge on load modulation, I'm trying to work out how my boiler is meant to work, and that is my question.
Some websites make out that modern boilers, if working with a compatible thermostat (I have a wireless Honeywell model), should modulate the load up and down and avoid stop starting. But looking at instructions for my boiler, it suggests that load modulation only works if you have weather comp fitted. Does anyone know the truth?!!! I've never had to use mine too much yet, as I'm not always home. But I get the impression that whilst it doesn't just send out full heat, it isn't modulating the temp flow too much either. As such it does stop start a lot. Room reaches requested temperature, and it shuts itself off. Drops below requested, and off it shoots again!
Saying that, it is good at keeping a pleasant temperature, and I never have scalding hot radiators, but with extra knowledge, I'm wondering if I'm missing something.
Should I have had the weather sensor fitted afterall?
Should my boiler be able to load cycle with just a room thermostat, or does it need weather comp for this?
Right, end of essay, thanks for reading.
Last year I had a Vitodens 100 combi installed. So believe it must have been the B1KC model?
As is often the case, I thought I had done my homework beforehand. Which to be fair I had. But unfortunately nowhere near enough.
Everything on the whole seems fine.
However, I am now doing a bit more homework on the whole subject, and realising just how much I hadn't realised.
Such things as:
Boiler Plus requirements
Opentherm
Modulating heating loads (I never knew boilers did this!!!)
Plus- exactly what weather comp does.
When I got the boiler fitted, I went with an installer who had done a good job at my brothers place. His preference is pretty much always to fit Vaillant boilers, but I had decided on the 100W.
He wasn't keen at first, as the only one he had previously fitted ended up with a burst rubber pipe. But after all of us doing a bit more homework, we realised the offending pipe was now metal on the current model.
He put himself on the Viessmann course, and all went fine.
However as mentioned, I now realise just how much I was never told.
He was of the opinion Weather comp was a waste of time. I was in agreeance as everything the manufacturers told you about it made it sound like a complete fad. So despite I think coming with the sensor, it isn't fitted.
This forum has since taught me stuff about it that no manufacturer tells you, and I have still only touched the surface.
I also now realise nothing was ever mentioned to me about things like load modulation and Opentherm etc etc. I was of the belief the boiler just stop started as it needed to, depending on the internal temperature. So with my new found knowledge on load modulation, I'm trying to work out how my boiler is meant to work, and that is my question.
Some websites make out that modern boilers, if working with a compatible thermostat (I have a wireless Honeywell model), should modulate the load up and down and avoid stop starting. But looking at instructions for my boiler, it suggests that load modulation only works if you have weather comp fitted. Does anyone know the truth?!!! I've never had to use mine too much yet, as I'm not always home. But I get the impression that whilst it doesn't just send out full heat, it isn't modulating the temp flow too much either. As such it does stop start a lot. Room reaches requested temperature, and it shuts itself off. Drops below requested, and off it shoots again!
Saying that, it is good at keeping a pleasant temperature, and I never have scalding hot radiators, but with extra knowledge, I'm wondering if I'm missing something.
Should I have had the weather sensor fitted afterall?
Should my boiler be able to load cycle with just a room thermostat, or does it need weather comp for this?
Right, end of essay, thanks for reading.