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Ifc circulators with zone valves

RayH
RayH Member Posts: 101
in Oil Heating
Does a system that has zone valves and no flow check require an Ifc circulator

Comments

  • STEVEusaPA
    STEVEusaPA Member Posts: 6,505
    edited January 2018
    Usually no, but it depends on how its piped. Are you getting ghost flow in the zones not calling for heat?

    There was an error rendering this rich post.

  • NY_Rob
    NY_Rob Member Posts: 1,370
    If your zone valves are controlled by your t-stats directly and you have a indirect hot water tank that has DHW Priority enabled, the zone valves will remain open when the indirect tank circulator is running.
    If you didn't have a flow-check on/after the spaceheating circulator in this case you would get reverse flow through the spaceheating loops with energized zone valves.

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