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    Gas flex thru FAU sidewall

    Gas flex thru FAU sidewall

    New postby Marc M on Sat Aug 27, 2011 11:17 am

    Jerry, Can you cite the code which specifically addresses flex (fuel line) through the sidewall of a furnace cabinet?
    Thank you
    -Marc
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    Re: Gas flex thru FAU sidewall

    New postby Jerry Peck - Codeman on Sat Aug 27, 2011 11:32 am

    Hi Marc,

    Did you verify if CSST or if an appliance connector?
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    Re: Gas flex thru FAU sidewall

    New postby Marc M on Sat Aug 27, 2011 11:39 am

    Sorry, just an appliance connector. I keep hearing differing opinions...want to get it right once and for all.
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    Re: Gas flex thru FAU sidewall

    New postby Jerry Peck - Codeman on Sat Aug 27, 2011 1:47 pm

    Marc,

    The code simply says to install the gas connector in accordance with the manufacturer's installation instructions.

    The most common gas connector is likely this one: http://www.dormont.com/dmc/res/GasConnectors.aspx

    The installation instructions for that one are attached. I will contact a person with more expertise in this than I am for the answer, but my reading of the installation instructions does not give an exception to "DO NOT install the gas connector so that it is concealed within or runs through any wall, floor or other partition." any wall, floor or other partition." would be that they are referring to a structure's walls, floor, or other partition, not that of an appliance. Let's see what the expert says.
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    Re: Gas flex thru FAU sidewall

    New postby Hearthman on Sat Aug 27, 2011 6:31 pm

    I ran into this before with a Fire Marshal. After speaking with the head engineer at Dormont and Ted Lemoff at the NFPA, I concluded it is ok to pass a flexible appliance connector through the sidewall of an appliance cabinet IF it is sleeved in a conduit to protect it and electrically insulate it. Both ends of the connector must be 'accessible' for inspection and service. However, passing flex connectors through floors, walls, etc. or concealing even one end is strictly forbidden.

    All the other code requirements still apply such as shutoff within 6ft., sediment trap, ground union, etc. Some AHJs will concede the flex connector functions as a ground union while others still require it in sch 40 pipe. Since unions are the #1 source of leaks, I'd leave it out if I used a flex connector. Be sure to size the connector as each foot de-rates it and in any case you cannot exceed 3' for a heater. Also, never re-use flex connectors.

    In the case with CSST, it can penetrate an appliance cabinet if it, too is sleeved in conduit and electrically insulated from the cabinet.
    HTH,
    Keep the fire in the fireplace.
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    Re: Gas flex thru FAU sidewall

    New postby Marc M on Sat Aug 27, 2011 11:42 pm

    Wow...pretty interresting. Thanks for taking the time gentlemen.
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