Takagi outdoor propane tankless tk3

Discussion in 'Tankless Water Heater Forum' started by HANK WHITE, Nov 10, 2011.


    HANK WHITE New Member

    Mar 10, 2010
    redding calif
    The *&^%$ takagi tk3 water heater wouldn't start again this morning in redding, ca. The outside
    air temp was 41 degrees, and the infrared thermometer (auto shop tool) said the propane pipe was
    at 31 degrees and the h20 pipe was at 35 degrees. No fire at all, and propane this cold probably
    wont burn well at all, no matter how big the tank or pipes are. I noticed this cold propane
    problem as a young marine in the snow at high altitude on maneuvers. I don't think propane
    has changed much in the ensuing 40 years, so before you crush that *&^%$ tankless unit, get
    or borrow an infrared thermometer and see just how cold the h20 and gas inlets really are!
    I never could light really cold propane. There is probably some special fix i am clueless about.
  2. Dana

    Dana In the trades

    Jan 14, 2009
    Temps at high altitude tend to be a heluva lot colder than 31F. Frost on the propane line isn't usually a problem (but with butane it could be.) Don't blame the fuel- they use propane as heating fuel with above-ground tanks in places with design temps in the negative teens, and you BET the tank temps are well below 31F!

    Careful about looking at pipes with infra-red- the emissivity of bare metals can be quite different from the IR thermometer's presumption. It'll read significantly on the low side for any shiny bare metal.
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