Manifold TRV ok on Supply side?

rossn

I am installing some Uponor stainless manifolds for radiant in my home, and the manifold of discussion will be on a danfoss inline TRV. I think I recall that it is standard convention to put the TRV on the return (versus supply) side. Given the space, threads, and flow directionality of the TRV, it would actually be better on the supply side. Of course, it stops the flow, either way. Is it wonky to put the TRV on the supply side?

Bonus question... these manifolds have some 1" stainless supply/return ball valves. the manifold (serving upstairs) is mounted relatively high. Any issues with mounting the handle for the valve on the bottom side (easier to reach)? I didn't know if there were any issues with sediment and gravity, etc.

Thanks!
Ross

Paul Pollets

TRV's install on the supply of radiators. Why would you put one on a radiant distribution manifold? The TRV head needs to sense the temperature of the radiator it's installed on.

psb75

You maybe mean a thermostatic "mixing" valve connected to the supply manifold--and is also connected to the return manifold.
TRVs go on radiators.

hot_rod

TRV with a remote sensor bulb?

rossn

Yes, hot_rod is right. I have a few radiators, some towel warmers, and a lot of loops for radiant ceiling and floor. Some of the manifolds serve an entire zone with multiple loops, so the remote TRV goes on the supply or return for the manifold.

Now, back to the original two questions. Can anyone speak to these. I think I found in my notes that supply side is OK.

rossn

Not really a balancing valve, rather system or emitter temperature regulation.

hot_rod

I have a few on cast iron radiators in my shop, both S&R. As long as flow direction is correct.
I know they chatter when flow is reversed

Let me check with Italy for a thumbs up.

hot_rod

hot_rod said:

I have a few on cast iron radiators in my shop, both S&R. As long as flow direction is correct.
I know they chatter when flow is reversed

Let me check with Italy for a thumbs up.

Either supply or return. Ideally the thermostatic head should be horizontal to get good airflow and accurate ambient temperature readings.

rossn

thanks