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LWCO vs Flow Switch

Al Corelli_2
Al Corelli_2 Member Posts: 395
in THE MAIN WALL
Inspectors around here will not accept a flow switch instead of a LWCO.

I like to use LWCO anyway. It is added protection as well as code compliant.

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Comments

  • Plumdog_2
    Plumdog_2 Member Posts: 873
    LWCO vs Flow Switch

    Thinking of going with a Flow Switch for a Mod-Con Install. Low Water Cut-Off is easy enough to configure, but I'm thinking the pump(s) as well as the boiler could benefit from protection of Flow Switch if it is wired into the main power. But some kind of timer with very short proving duration would be needed. Any suggestions?
  • Plumdog_2
    Plumdog_2 Member Posts: 873
    code requirement

    I guess I was going by the old Uniform Mechanical code where a Flow Switch is required in lieu of a Low Water Cut-off for coil type boilers or water-tube type boilers where forced circulation is required to prevent overheating. The International Code requires a Low-Water Cut-off on all heating boilers regardless; so maybe it's a moot point depending on locale. Manufacturers installation recommendation for the Trinity is either a Low-Water or Flow Switch. I've seen pumps burn out when the LWCO is placed below the upper parts of P/S piping and airlock has occurred.
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