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  1. steelsparky

    Heat recovery unit and recirculation piping

    Ok here is a piping diagram for the HRU. http://www.hotspotenergy.com/heat-recovery-system-diagrams/single%20unit%20with%20customer%20tank%20without%20TT.pdf Where do I pipe the recirculation loop back to tank, tee into drain line also? Use check valves? Thank you
  2. steelsparky

    Heat recovery unit and recirculation piping

    I'll have to get an exact model serial but it's a Trevor Martin. And yes it preheats the water. The hru says to tee off cold water supply at the tank and then pipe return into the drain. So I guess my next question is where do I pipe the return for the recirculation loop? Also in the drain?
  3. steelsparky

    Heat recovery unit and recirculation piping

    While I may not be a plumber, I have been called a freon plumber. I do refrigeration and A/C and just got a deal on a heat recovery unit which uses the discharge line to heat water. While I can easily figure out the A/C side of it, I am curious about the water side piping involving the tank...
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