Found this on a job today

[Gray0689]

What's that on lhs of ufh manifold trv? Where are ufh zone actuators?

It is a sort of trv used on a uponor manifold to control heat mix
I don't actually think the plumber had much of an idea lol

 

[stevetheplumber]

What's that on lhs of ufh manifold trv? Where are ufh zone actuators?

a lot of early underfloor systems didnt have actuators especially if they fed large areas temp controll over the whole area rather than seperate rooms i dont actually think the instal is totaly bad a lot better than some semi comercials ive seen in hotels and nursing homes

 

[Gray0689]

a lot of early underfloor systems didnt have actuators especially if they fed large areas temp controll over the whole area rather than seperate rooms i dont actually think the instal is totaly bad a lot better than some semi comercials ive seen in hotels and nursing homes

Bronze pump on heating then the magna on secondary return
I'd say its been a few different plumbers in there

 

[Ermintrude]

So the only control is the pump? Doesn't appear to be any zv? How does trv work? Can't blend only open and close? Only been doing systems for last 10 years and not seen this. used to using plate exchanger from Mitsubishi air source ac to ufh in commercial systems and gas or matches in domestic. Looks like it started out with good intentions (ply wood) and then forgot to plan or set anything out! Looks like a whole lotta fun!