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Bimini BWC120

Paul S_3
Paul S_3 Member Posts: 1,261
Im installing a crown bimini bwc120. the primary loop is a 2 pipe primary secondary.in the manufactures literature it shows the "boiler loop pump (0013)" on the return pumping AWAY from the 2 closely spaced tee's...the primary pump is pumping TOWARD the closely spaced tee's.....my question is in Dan's book ""primary\secondary pumping made easy" it always shows the primary pump pumping away from the closely spaced tee's.....i called the manufacture and they said thats the "PONPC"...and they told me that pumping away from the boiler loops tee's would void warranty. any thoughts?? thanks Paul S
ASM Mechanical Company
Located in Staten Island NY
Servicing all 5 boroughs of NYC.


  • Ironman
    Ironman Member Posts: 7,376
    edited November 2013

    If the expansion tank is in the primary loop, then all of the secondaries (including the boiler) will "see" the entire primary loop as the PONPC. Therefore, all secondary loops should pump away from the primary, not toward it.

    Is that a 120k btu boiler? If so, then 1 1/4 would be sufficient at a 20* delta T.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
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