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Hydronic oil boiler connection help

randle2318 Member Posts: 1
So I have 4 zones, 4 circulating pumps 3 connected to thermostats and 2 connected to relays. One pump isnt even connected to anything and another is connected to an on/off switch and no thermostat.

Ok. My question is should I just buy 2 more relays and a thermostat to connect the last 2 pumps correctly? And what thermostat should the brown wite coming fron the boiler he connected too?


  • DZoro
    DZoro Member Posts: 1,048
    Could you back up and take a picture of the entire "system". It's hard to tell what is happening.
  • Intplm.
    Intplm. Member Posts: 1,608
    Need some more info. To what end and, what are you trying to accomplish ? Please provide more pictures.
    HVACNUT Member Posts: 5,476
    Yes, neither your statement nor pics make sense.
    4 zones
    4 circs
    3 are directly wired to 120v thermostats and 2 zones are wired through switching relays.
    I count 5 zones.
    One circ not connected. 6 zones?
    One circ wired to a switch only. 7 zones?

    How can there possibly be more than one zone when theres a circ pumping right out the top of the boiler? All circs, no zone valves.
    Even H.S. the primary circ should be on the return.

    Pics from farther back and a better description of controls and what you want to achieve. You may be able to wire all zones to a zone control board depending on the wiring.
  • Voyager
    Voyager Member Posts: 383
    An electrical schematic is worth its weight in gold.