I recently (January) installed a Vitodens 200W with a sub-mounted mixer kit into my home as part of a refurbishment project. I have installed the WC controller and use the unmixed supply for the upstairs radiators, and the mixed supply for UFH downstairs.
So far I'm very happy with it, but I'm trying to get it setup to match my house a little better. In the cold weather, the temperature stays pretty much where we want it, so i think that the slopes, zero points, and set temps are ok:
Rads:
slope = 1.6, level = -1K, RTset = 20C
UFH:
slope = 0.9, level = -2K, RTset = 19C
Max flow temps are set to 74C for rads and 47C for ufh.
The problem is that with the warmer weather, and particularly when the sun is shining on the back of the house, it gets too hot, and the heating is still on (albeit at a cool temperature) when it's say 18C outside.
Should I be using the Summer Eco Function (coding address A5) to deal with this? And also the extended function (A6)? And how would I go about figuring out the appropriate time constant (address 90) for my house?
Or.... are these settings generally left as factory defaults and I actually have the basics of slope and level wrong for my house?
Any help from someone who is familiar with setting up Viessmann WC would be most welcome
Thanks!
So far I'm very happy with it, but I'm trying to get it setup to match my house a little better. In the cold weather, the temperature stays pretty much where we want it, so i think that the slopes, zero points, and set temps are ok:
Rads:
slope = 1.6, level = -1K, RTset = 20C
UFH:
slope = 0.9, level = -2K, RTset = 19C
Max flow temps are set to 74C for rads and 47C for ufh.
The problem is that with the warmer weather, and particularly when the sun is shining on the back of the house, it gets too hot, and the heating is still on (albeit at a cool temperature) when it's say 18C outside.
Should I be using the Summer Eco Function (coding address A5) to deal with this? And also the extended function (A6)? And how would I go about figuring out the appropriate time constant (address 90) for my house?
Or.... are these settings generally left as factory defaults and I actually have the basics of slope and level wrong for my house?
Any help from someone who is familiar with setting up Viessmann WC would be most welcome
Thanks!