Andrew as a heating engineer I do find your videos very informative and commend your knowledge and experience! I wish the industry would provide more and simpler guidance to incorporate things like this in to more domestic installs. Question for you….. can you install a stand alone mixing set that would control the connected circuit temperature independently from the Boiler? (Ie Boiler is not capable of controlling a mixer set) assumed boiler would be on WC with multiple circuits.
@@ktmman3 it was interesting to see that your question already had two likes before I read it. Obviously there's others want an answer to this question too. Esbe make a weather compensated mixing valve that can be added to an underfloor heating circuit or any other circuit I guess. However you would need to ensure that the water delivered to that circuit was of a temperature suitable to mix with the return water of that circuit to be able to give the correct flow temperature within the circuit. Very often the temperature required at point of delivery to the mixer for an underfloor heating system will need to be higher than the temperature required for radiators on the same system. So here you would need to have a second weather compensated mixer for the radiator circuit. The weather compensation control would then need to be set in a way as to run that's a high enough temperature to satisfy both mixed circuits. It's my opinion that these mixes are better suited for use after a high temperature buffer perhaps supplied by solid fuel
@andrewmillwardwatford9410 as a none heating engineer but with a keen interest on it all, i think i understand this meaning that the valves requiring more control require lower kvs so either the bore is smaller inside the valve to provide better control of min to max flow, especially when it first cracks open. Where as if the bore is too large, even when the mixer motor cracks it open a little bit, the gaps still so large that too much flow is allowed and after a certain % of opening, instead of having 0 to 100% authority, by the time its open lets say 15%, theres already more than the maximum flow you require. Having the correct kvs provides a full range of authority/control? After telling me last year you'd discovered some mixing valves had the wrong (too large) kvs value for where they were installed and that you were looking at where to obtain the correct part/mixer to suit domestic use, did you manage to source such a part for use with the esbe or meflows?
@@UrbanPlumbers if they're running at higher speed then they may be a little bit noisy. I noticed this one I first started setting up the system. But actually I'm running them at fairly low speed especially the radiator pump.
I've found those wilo pumps fail when installed outside in a shed or in a outdoor boiler module they definitely don't like damp conditions Tops maybe 1 year
So you are saying that those two valves are different? you have chosen a valve with a smaller orifice on the radiator circuit? Is this why you use those esbe valves instead of the viessmann mixers?
@andrewmillwardwatford9410 would adding the resistance on the flow before the mixer create the same effect? Like a balancing gate valve or flow setting valve?
@@alexbennett8437 adding resistance before is adding resistance to the circuit to be controlled this would then require a different kvs value through the valve to compensate for the extra resistance. I think this was being recommended by one of the manufacturers of pump groups at 1 point but it is not good Theory
Andrew as a heating engineer I do find your videos very informative and commend your knowledge and experience! I wish the industry would provide more and simpler guidance to incorporate things like this in to more domestic installs. Question for you….. can you install a stand alone mixing set that would control the connected circuit temperature independently from the Boiler? (Ie Boiler is not capable of controlling a mixer set) assumed boiler would be on WC with multiple circuits.
@@ktmman3 it was interesting to see that your question already had two likes before I read it. Obviously there's others want an answer to this question too. Esbe make a weather compensated mixing valve that can be added to an underfloor heating circuit or any other circuit I guess. However you would need to ensure that the water delivered to that circuit was of a temperature suitable to mix with the return water of that circuit to be able to give the correct flow temperature within the circuit. Very often the temperature required at point of delivery to the mixer for an underfloor heating system will need to be higher than the temperature required for radiators on the same system. So here you would need to have a second weather compensated mixer for the radiator circuit. The weather compensation control would then need to be set in a way as to run that's a high enough temperature to satisfy both mixed circuits. It's my opinion that these mixes are better suited for use after a high temperature buffer perhaps supplied by solid fuel
@andrewmillwardwatford9410 as a none heating engineer but with a keen interest on it all, i think i understand this meaning that the valves requiring more control require lower kvs so either the bore is smaller inside the valve to provide better control of min to max flow, especially when it first cracks open.
Where as if the bore is too large, even when the mixer motor cracks it open a little bit, the gaps still so large that too much flow is allowed and after a certain % of opening, instead of having 0 to 100% authority, by the time its open lets say 15%, theres already more than the maximum flow you require. Having the correct kvs provides a full range of authority/control?
After telling me last year you'd discovered some mixing valves had the wrong (too large) kvs value for where they were installed and that you were looking at where to obtain the correct part/mixer to suit domestic use, did you manage to source such a part for use with the esbe or meflows?
@@handle1196 SB have a wide range of different kvs values so now I am just using SB valves
Do you find those Will pumps noisy? Every single one I installed is noisy. Decided not to buy them anymore.
@@UrbanPlumbers if they're running at higher speed then they may be a little bit noisy. I noticed this one I first started setting up the system. But actually I'm running them at fairly low speed especially the radiator pump.
What pumps have you chose to use instead?
I've found those wilo pumps fail when installed outside in a shed or in a outdoor boiler module they definitely don't like damp conditions
Tops maybe 1 year
So you are saying that those two valves are different? you have chosen a valve with a smaller orifice on the radiator circuit? Is this why you use those esbe valves instead of the viessmann mixers?
@@alexbennett8437 exactly
@andrewmillwardwatford9410 would adding the resistance on the flow before the mixer create the same effect? Like a balancing gate valve or flow setting valve?
@@alexbennett8437 adding resistance before is adding resistance to the circuit to be controlled this would then require a different kvs value through the valve to compensate for the extra resistance. I think this was being recommended by one of the manufacturers of pump groups at 1 point but it is not good Theory