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Onex 160B Bypass Valve Setting

TravelerDX Member Posts: 1
In normal operation, should the manual Bypass Valve on an Onex 160B with 7 zones of radiant heating be open or closed? Reference "Suggested piping and wiring connections for the 160B Models 45AN and 45EN", page 23, Bypass Valve #7.


  • kcopp
    kcopp Member Posts: 3,698
    I have installed a number of these. They were ok.
    I have done the bypass set only on baseboard set ups where the loops were short. Typically the ball valve was set to 1/2 way.
    If you are doing radiant floor you really need to be piping the boiler Primary/ Secondary.
    One loop just for the boiler one for the radiant.... Closely spaced tees or a hydro separator.

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