Ceiling radiators and TRVs

cnmdesign

Putting pex radiators in my ceilings regulated with TRVs.

Anyone else have ceiling heat and where did you locate your TRVs?

What TRVs did you use?

What's your starting temp?

What's your ceiling surface temps?

Do you like it?

Thanks

hot_rod

This is an option for a wall mounted TRV, commonly used with panel radiators also.

Alan (California Radiant) Forbes

"TO BE DISCONTINUED"

I wonder if there will be a replacement.

hot_rod

looks like a few different versions on their
site.https://www.oventrop-us.com/unibox

cnmdesign

Thanks Hot Rod
Been working with John Siegenthaler on this project and he too suggested this TRV. I was thinking more in line with the Caleffi' 472 Thermostatic Control Head (with remote adjusting knob)

https://www.caleffi.com/usa/en-us/catalogue/thermostatic-control-head-remote-adjusting-knob-472000

so I can keep the valve out of the wall cavity in case of maintenance. Just wish the Capillary length was longer so I could have all the valves in the mechanical room to remove the possibility of damage from a leak or need for change out. My basement will be finished so I can't really go down with the valve that only leaves the attic and that's not good either, but doable. I lived in Germany for seven years and some of the places I lived in with in floor had all the TRVs located in a medicine cabinet type setting in the laundry room. More like a set and forget. I would rather have control from each room.

Thanks

hot_rod

cnmdesign said:

Thanks Hot Rod
Been working with John Siegenthaler on this project and he too suggested this TRV. I was thinking more in line with the Caleffi' 472 Thermostatic Control Head (with remote adjusting knob)

https://www.caleffi.com/usa/en-us/catalogue/thermostatic-control-head-remote-adjusting-knob-472000

so I can keep the valve out of the wall cavity in case of maintenance. Just wish the Capillary length was longer so I could have all the valves in the mechanical room to remove the possibility of damage from a leak or need for change out. My basement will be finished so I can't really go down with the valve that only leaves the attic and that's not good either, but doable. I lived in Germany for seven years and some of the places I lived in with in floor had all the TRVs located in a medicine cabinet type setting in the laundry room. More like a set and forget. I would rather have control from each room.

Thanks

We have been pushing Italy for a longer cap tube. It is not a big selling actuator in the US market.
We sell thousands of various TRVs around the world each year. It is a common and commonsensical way to control hydronics.

cnmdesign

HR

Think they could design one operated by low voltage thermostat wire?

*Like: Bulb, Cap Tube, Pin, Rheostat, wire, Rheostat, Pin, TRV control.

*Not an electrical Engineer, but I did play one while typing this post.

hot_rod

cnmdesign said:

HR

Think they could design one operated by low voltage thermostat wire?


*Like: Bulb, Cap Tube, Pin, Rheostat, wire, Rheostat, Pin, TRV control.

*Not an electrical Engineer, but I did play one while typing this post.

You mean a thermostat and zone valve? Plenty of brands and styles of that control combination.

The biggest feature of TRV is they are non electric, mount them anywhere they see flow.

They are as a proportional control, instead of a typical zone valve which is bang/ bang.

There are battery operated setback controls now, that snap on to the actuators.

cnmdesign

Is it best to have the TRV on the supply or the return?

Will my Alpha2 15 55f handle all the ceiling radiators running off of one manifold? 15 11.5 x 12 rooms on average, 1/2 in Pex Al Pex.

PC7060

My Honeywell Braumann high flow units are all on the supply side but new ones for panel rads can typically be located on either side. 

cnmdesign

Does using TRVs remove the need to figure flow rates?

Alan (California Radiant) Forbes

I believe they are usually on the supply side. The nipple threads into the radiator.

cnmdesign

HR

Using the below body?

https://www.caleffi.com/usa/en-us/catalogue/radiator-valve-body-straight-339302

Going to use it along with something like this actuator
https://www.amazon.co.uk/evohome-THR92H1002-WIRLESS-Radiator-Controller/dp/B00P12BJNO/ref=sr_1_30?dchild=1&keywords=Honeywell+Home&qid=1596591591&sr=8-30

hot_rod

Are you looking for remote control, or just a setback program at every head?

Caleffi has the WiCal series, although not sold in the US. Probably any product not specific for the North American market will be metric units, if that matters? I'm sure you could find them online.

I'm not sure if that Honeywell will match the Caleffi valve? Threads are standard, but the pin travel length can vary from brand to brand.

https://www.caleffi.com/sites/default/files/file/01263_en.pdf

cnmdesign

HR

After a little research yesterday and came across the Caleffi 202 series actuator with the LED temp indicator on the end of it. If I can get all the hardware required to attach the body inline to pex al pex, I will design my own wall box with plate so the only thing showing is the actuator.

https://www.caleffi.com/sites/default/files/file/01034_en.pdf

ewang

What ceiling radiators are you using?

Paul Pollets

I'd use the Danfoss R2000 with remote capillary. If the valve and TRV head are reachable to adjust, that's the easiest way.
I've used dozens of the Oventrop Unibox. It's used primarily when you remove a radiator and replace it with a radiant heat zone. It handles 12K btus and can be used to control a small radiant zone as well. It doesn't require a pump.

cnmdesign

Does anyone have any firsthand knowledge on the SIS-060 from Space Pack? Looking at maybe getting one.

Is there anything out there newer or better at a lesser price?

Thanks

PC7060

cnmdesign said:

Does anyone have any firsthand knowledge on the SIS-060 from Space Pack? Looking at maybe getting one. Is there anything out there newer or better at a lesser price? Thanks

This is a long dormant thread on a different topic, probably better if you start a new thread .