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TRV's

Ernie
Ernie Member Posts: 94
in THE MAIN WALL
All Loops are home run for each room for a total of 4 loops.

Comments

  • Ernie
    Ernie Member Posts: 94
    TRV's

    Any body use TRV’s on fintube baseboard? If so pros and cons, and is one make more suited
    than another. I am trying to reduce circulators to just two, one for the system the other for the
    indirect with priority control or possibly a 3-way valve, one circulator and priority control. Any thoughts would be appreciated
  • Josh_10
    Josh_10 Member Posts: 787


    I just finished a job just like you are describing. I think it works great. It was the request of my customer who just moved here from England. Very simple not much to go wrong and yes fewer pumps which means less electricity.

    I would do 2 things as a rule though. #1 and the most important in my mind is to install a differential pressure by-pass valve on each pump circuit. #2 install a remote sensor. Away from the radiator.
  • Mike T., Swampeast MO
    Mike T., Swampeast MO Member Posts: 6,928


    Is this a one-pipe loop of baseboard? If so, do be aware that bypass lines are required around each baseboard element in the loop. The most convenient place to put the bypass is inside the baseboard enclosure. You also need room for the TRV valve body (about 4"-5" minimum) with the straight through versions. It's possible to mount the valve body outside of the baseboard enclosure, but if below the floor or not inside the actual room being heated you MUST use a remote operator that is connected via a capilliary tube. You also must have room for the TRV operator. I believe it's possible to use the self-contained operators--this will involve drilling a hole through the baseboard cover so the operator projects out into the room.

    Retrofitting TRVs into a one-pipe baseboard system (again, is it one-pipe) will have a HIGH degree of variability when it comes to ease of installation.

    I highly suggest this Paper from "The Library" here at Heating Help!

    Noel (from Slant Fin) and I had a great phone conversation a while back. I suggested that it would be a good idea for them to develop "TRV friendly" fin baseboard designs. He agreed, but I'm not sure if such is available. It's really going to be about finding space for the valve body and operator. Personally, I'd recommend a remote adjusting and sensing operator, but even this takes some space when it attaches to the valve. Why the remote adjusting and sensing operator? Way down at the floor (and probably in a corner) isn't the most convenient place, nor is it best for sensing room temperature.
  • Ernie
    Ernie Member Posts: 94
    Mike T

    Thanks for the input. My system is home run to each room, 3 BR,and one that serves the Kitchen/Dinning room, and Living room.
  • Mike T., Swampeast MO
    Mike T., Swampeast MO Member Posts: 6,928


    More than one baseboard within each loop?

    If so you'll definitely need a bypass line around each baseboard. If more than one baseboard in a single room you can sometimes leave them in a loop with just a single bypass for the room as a whole.

    The bypass is typically one pipe size smaller than the loop--for example you'll use ½" bypass for ¾" baseboard.

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