Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Rinnai IWH

Plumdog_2
Plumdog_2 Member Posts: 873
in THE MAIN WALL
Doesn't it divide into multiple smaller tubes thru the exchanger and then manifold back to 3/4?

Comments

  • SVDW
    SVDW Member Posts: 80
    Calling Rinnai IWH experts

    Does anyone happen to know whether a Rinnai 2532-FFU-C has 1/2" tubing through the HX or 3/4"? I know the connections are 3/4" but the diameter in the HX varies with some manufacturers. I called Technical support but still waiting..... I have a code inspector with apparently not much to occupy his time. Thanks for your replies!
  • SVDW
    SVDW Member Posts: 80
    PLUMBDOG

    Some of them do but my Inspector does not want to be confused with any irritating facts. He sees 1/2"piping & shot it down. Rinnai did get back to me & confirmed the 1/2" piping.
  • Plumdog_2
    Plumdog_2 Member Posts: 873
    ask him to cite the Code

    I think he is required to demonstrate the code when dissaproving an installation. What is his concern? Is it the flow capacity of the system?
  • Scott Gregg
    Scott Gregg Member Posts: 187
    Your Inspector is an/a

    You know what!

    The tubes are actually a metric size however they DO manifold back to 3/4" It is not about the size of the tubing but the flow rate it can produce. The 2532 can do a max of 8.5GPM but will give you more like 5-7GPM most of the year depending on incomming water temps.

    Unfortunately you might have to go over his head a bit. N ormally this is not a good idea but if he won't listen to reason, someone will have to make a stand.

    think about getting your local Rep involved.
  • Dave Yates (GrandPAH)_2
    Dave Yates (GrandPAH)_2 Member Posts: 377
    Where's

    the beef!?! I too would like to know what he's basing the rejection upon. Ask him nicely & you may be plesantly surprised to find he believes there's a legit concern. Hit him with a 2x4 & you'll have a tough go of things.
  • JackFre
    JackFre Member Posts: 225
    The 2532

    does reduce to approx 1/2" tubing after the CW inlet valve. The flow rate however is a mixture, meaning that not all of the water is going thru the HX. The 2532 (new model # is R85, "8.5gpm max flow") The R85 has a trick CW by-pass which mixes CW with the hot coming out of the hot side of the HX to arrive at the right temp, so it is a kinda blended water.
  • JackFre
    JackFre Member Posts: 225
    Where are you?

  • SVDW
    SVDW Member Posts: 80


    I am in West Michigan. After inquiry I was told the Code requires a 3/4" hot water supply. I realize that some cold water bypasses the HX to blend to outlet setpoint however I think this is a losing arguement with the Inspector. We will go to the next larger model with 3/4" HX & mark it up to experience. Thanks for all your replies.
This discussion has been closed.

Categories