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New Lochinvar install with 0-10 VDC circulator

I'm just wondering if anyone has had the same issue. This pump comes with the new KHB boilers and I was eager to try it out. We wired it to the correct terminals, correct polarity, but the circulator does nothing. Reading voltage at the terminals and the boiler pump icon comes on, but the pump does not spin.

I've never had a new pump not work. It makes me think I'm doing something wrong.


Often wrong, never in doubt.

Comments

  • DZoro
    DZoro Member Posts: 1,048
    Try giving it a spin manually, I know the up 15's we had to free some of those up from being stuck
    D
  • ScottSecor
    ScottSecor Member Posts: 395
    Alan we have not installed a Lochinvar with the 0-10 volt control yet. However, we did install a Lochinvar hot water maker about a year ago with a bad Grundfos pump from the factory (came with the Armor boiler). We've purchased a few hundred Grundfos pumps so far and this was the only one that did not work perfectly out of the box.
  • Thanks, guys!

    I first took the nut off the back of the pump to see if the impeller was spinning and then took the motor off the volute and spun the impeller. Just dead.
    Often wrong, never in doubt.
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 10,355
    Probably a stupid question but you said checked voltage at the terminals. Did you check at the motor?

    ........don't throw anything heavy, could be a wiring issue from the factory
  • Probably a stupid question but you said checked voltage at the terminals. Did you check at the motor?

    ........don't throw anything heavy, could be a wiring issue from the factory

    It was hard to find exposed leads inside the motor, but we did and there was voltage.
    Often wrong, never in doubt.
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 10,355
  • Steve Minnich
    Steve Minnich Member Posts: 2,680
    I had one die within a week @Alan (California Radiant) Forbes
    Steve Minnich
    Minnich Hydronic Consulting & Design, LLC
    [email protected]