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Viessmann cast iron boiler replacement.

JohnNY
JohnNY Member Posts: 3,317
in THE MAIN WALL

Here's an interesting one…
My client is absolutely in love with this Viessmann Atol boiler but now that it's 32 years old, it's showing its age, and not quite as reliable as it once was.
It's been working all it's life on ODR, no thermostats, and a three way mixing valve for boiler protection.
We're both sorry to see it go, but it's time.

IMG_6250.JPG
Contact John "JohnNY" Cataneo, NYC Master Plumber, Lic 1784
Consulting & Troubleshooting
Heating in NYC or NJ.
Classes
GGrossRPK

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Comments

  • SuperTech
    SuperTech Member Posts: 2,581

    Thats a shame. Looks good and I love how it's setup.

    What are you planning on installing in its place?

    JohnNY
  • JohnNY
    JohnNY Member Posts: 3,317

    I'm not sure yet but I'm probably going with a Weil-McLain CGa with pri-sec piping and a simple Taco PC700 boiler control.

    Contact John "JohnNY" Cataneo, NYC Master Plumber, Lic 1784
    Consulting & Troubleshooting
    Heating in NYC or NJ.
    Classes
    SuperTech
  • delcrossv
    delcrossv Member Posts: 2,143
    edited October 2024

    What's the matching tank next to it? Buffer?

    Trying to squeeze the best out of a Weil-McLain JB-5 running a 1912 1 pipe system.
  • GGross
    GGross Member Posts: 1,492

    I believe that is a Verticell indirect water heater

    JohnNYdelcrossv
  • GW
    GW Member Posts: 4,952

    atmospheric with all the paint and such

    Gary Wilson
    Wilson Services, Inc
    Northampton, MA
    gary@wilsonph.com
    GGrossJohnNY
  • psb75
    psb75 Member Posts: 1,039

    Sorry it can't be Viessmann for Viessmann.

    But I understand. It's now Carrier, anyway.

    Mad Dog_2
  • HVACNUT
    HVACNUT Member Posts: 6,744
    edited October 2024

    @JohnNY , is the Viessmann also atmospheric? I see its labeled NOx, and I've never seen that model before.

  • hot_rod
    hot_rod Member Posts: 25,002

    Some of the Crown boilers had those wet based sections, made by Viessmann in them. A rock solid boiler.

    The smaller residential models Atolas had a 3rd aquastat that provided boiler protection by shutting off the circulator. All the aquastat sensors cap. tubes went into a triple well.

    Interesting steel parts on the work bench?

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • mattmia2
    mattmia2 Member Posts: 12,593
    hot_rod

    Now that you have me looking, what is with the lower ledge on the bench?

  • HVACNUT
    HVACNUT Member Posts: 6,744

    Looks like a Hot Surface Igniter.

  • JohnNY
    JohnNY Member Posts: 3,317
    HVACNUT

    Yes, it is atmospheric and I hadn't seen it either until now. It was a big deal in its day

    Contact John "JohnNY" Cataneo, NYC Master Plumber, Lic 1784
    Consulting & Troubleshooting
    Heating in NYC or NJ.
    Classes
    HVACNUT
  • gyrfalcon
    gyrfalcon Member Posts: 187

    @JohnNY , are you going to show us the pics of the new installation? Is the indirect being replaced too?

    Slant Fin Galaxy GG100(1986) , 2 zone hot water baseboard, T87 Honeywell thermostats. 
  • ScottSecor
    ScottSecor Member Posts: 968

    First of all, fantastic photo taking advantage of the natural light. Amazing how much a great photo shows all of the details. I especially liked the item that appears to be a flywheel on the back of the workbench. Timer near the boiler is intriguing as well.

    JohnNYGreening
  • JohnNY
    JohnNY Member Posts: 3,317
    ScottSecor

    So glad you noticed, Scott. :)

    Thanks!

    There’s a little vignetting here as well

    Contact John "JohnNY" Cataneo, NYC Master Plumber, Lic 1784
    Consulting & Troubleshooting
    Heating in NYC or NJ.
    Classes
    ScottSecor
  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Member Posts: 4,410
    edited October 2024

    The boilers last forever. The controls don’t.

    I’d be tempted to install a Vitocrossal CU3A. Old school, high water volume.

    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
    offdutytechdelcrossv
  • JohnNY
    JohnNY Member Posts: 3,317

    I'm tempted to install a Weil-McLain Ultra, or a Lochinvar Knight, or a Viessmann B2HE…
    The customer just isn't going to spend the money on a repipe to an HE installation. We're also re-using the indirect water heater.

    Contact John "JohnNY" Cataneo, NYC Master Plumber, Lic 1784
    Consulting & Troubleshooting
    Heating in NYC or NJ.
    Classes
  • GW
    GW Member Posts: 4,952

    John the CU3a can be piped like any old school boiler, if leaving the piping as is keeps costs down. It’s hard to imagine the owner paid large dough 30 years ago, and now wants to go on the cheap- give him the best!

    It’s like pulling a G115 or an EK and installing a Smith or a Utica😀


    humbly, the European boiler proponent

    Gary Wilson
    Wilson Services, Inc
    Northampton, MA
    gary@wilsonph.com
    JohnNYdelcrossv
  • Mad Dog_2
    Mad Dog_2 Member Posts: 8,078

    Unfortunately, very few people put a value on their heating system anywhere close to A new kitchen, bathroom, car, boat, et cetera. At best, it's a necessary evil and at the bottom of the Totem pole. Sad but true. Mad Dog

    Consulting by Mad Dog & Matt Jr.
    HVACNUTJohnNYLong Beach Ed
  • GGross
    GGross Member Posts: 1,492

    I just wish they had put that new control on the CU3A

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