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Phase 3 not firing

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rrhyins1
rrhyins1 Member Posts: 1
in Domestic Hot Water

Hi folks, hope you can help. I have a phase 3 indirect and just installed a new taco 007e pump on boiler because I believed the pump was bad. No hot water and noticed the pump was spinning and burning hot but pipe cold. Switched stuff on & off rapped on pump and magically hot water cane back (have seriously bad hard water, figured debris in systerm jammed & fried pump, etc). So replaced pump and relay now shows zone with red light; green light with power. Bled air by shutting vale at tank end of pump, and connecting hose at valve at the end of pipe extending from pump to heater but no air came out, just cold water. Still no hot water? Boiler hot and right up through the tee-header, and new pump (0700e) has flashing green light. Pipes ice cold on the other end of pump…when I unplug the wire on aquastat, the pump's light goes off; on when I plug it back in. No hot water Aaaaahhhhh!!!

Comments

  • Big Ed_4
    Big Ed_4 Member Posts: 3,540
    edited May 3

    Air or a valve off ? Post the location of the valves you used to purge . It could get confusing selecting the correct valves . You want force the water though the complete zone piping to remove any traped air ..

    There was an error rendering this rich post.

  • kcopp
    kcopp Member Posts: 4,690

    Phase 3 has an air vent on top of the tank I believe. That may keep the tank air locked. Show us a pix.

  • 109A_5
    109A_5 Member Posts: 4,135
    image.png
    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System

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