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ex
ex Member Posts: 1
in THE MAIN WALL
Having problem getting flow thru a Burnham sm3-2 wall hung boiler, tried new circ, temp shoots rite up on supply side and then boiler shut down on limit, any ideas thanks

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  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Member Posts: 4,215
    Flow

    Something is smothering the flow - either a slug of air or an obstruction in the piping or boiler itself. Have you fully purged the air out of the system? And you had the same problem with the old pump?
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
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