R
Rystar00
Hi guys,
I would really appreciate your expert advice.
To cut a long story short I have recently renovated my house from top to bottom and had a new CH system installed. Key points below:
1. Vaillant Ecotec Plus 630 boiler
2. Vaillant vSMART System Controller (with a room thermostat)
3. Unvented HW cylinder
4. 13 radiators
5. 3 x towel heaters
6. 4 floors (my house is an old victorian terrace that’s narrow and short but tall!)
We had a plumber do the first fix but he badly let us down and disappeared so we asked another installer to finish the job. The second installer has commissioned the boiler.
The hot water is working absolutely fine. However the radiators are not getting hot. Some are completely cold. The system was flushed and all of the TRVs are set to fully open. Turning some of the TRVs off only has a marginal improvement on the heat output of the ones that remain on.
The installer came in to have a look and noticed the following:
1. HW demand caused the boiler to work at max output (the burner modulation graph was working maxed out and the flow temp was at 75 degrees)
2. As soon as as the demand for HW is satisfied and it turns to the CH the flow temp reduces to about 35 degrees
3. There is not much difference between the flow/return temperatures
4. Putting the room stat in the fridge didn’t cause the boiler to work harder
5. Turning off the weather compensator and running comfort mode didn’t cause the boiler to work harder
Vaillant sent an engineer out and he replaced the vSMART because of some dodgy wiring but running the same tests haven’t improved anything. He didn't stay around long enough to diagnose whether there was another problem.
I’m now absolutely desperate to get the heating working properly before it starts getting colder. Would you mind giving me a list of anything that could cause this problem (faulty boiler, faulty rads, needing a secondary pump etc) or things for the installer to try to get this fixed please?
I would really appreciate your expert advice.
To cut a long story short I have recently renovated my house from top to bottom and had a new CH system installed. Key points below:
1. Vaillant Ecotec Plus 630 boiler
2. Vaillant vSMART System Controller (with a room thermostat)
3. Unvented HW cylinder
4. 13 radiators
5. 3 x towel heaters
6. 4 floors (my house is an old victorian terrace that’s narrow and short but tall!)
We had a plumber do the first fix but he badly let us down and disappeared so we asked another installer to finish the job. The second installer has commissioned the boiler.
The hot water is working absolutely fine. However the radiators are not getting hot. Some are completely cold. The system was flushed and all of the TRVs are set to fully open. Turning some of the TRVs off only has a marginal improvement on the heat output of the ones that remain on.
The installer came in to have a look and noticed the following:
1. HW demand caused the boiler to work at max output (the burner modulation graph was working maxed out and the flow temp was at 75 degrees)
2. As soon as as the demand for HW is satisfied and it turns to the CH the flow temp reduces to about 35 degrees
3. There is not much difference between the flow/return temperatures
4. Putting the room stat in the fridge didn’t cause the boiler to work harder
5. Turning off the weather compensator and running comfort mode didn’t cause the boiler to work harder
Vaillant sent an engineer out and he replaced the vSMART because of some dodgy wiring but running the same tests haven’t improved anything. He didn't stay around long enough to diagnose whether there was another problem.
I’m now absolutely desperate to get the heating working properly before it starts getting colder. Would you mind giving me a list of anything that could cause this problem (faulty boiler, faulty rads, needing a secondary pump etc) or things for the installer to try to get this fixed please?