need to purge a furnace gas line?

Discussion in 'HVAC Heating & Cooling' started by beezer, Sep 17, 2008.

  1. beezer

    beezer New Member

    Messages:
    3
    I need to relocate my propane gas home furnace by approx. 19" and will need to disconnect the gas line and install a longer line. Once this is complete do I need to purge the gas line in order for the furnace to be able to light? This is a newer philco furnace with a honeywell valve. If I need to purge the line how and where is this done?
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,006
    Location:
    New England
    It may take a couple of tries to light it, but eventually it should get the gas there to light. Does it have a pilot light? Just get a lighter and hold it there until the pilot lights. A match may not last long enough!
  3. jimbo

    jimbo Plumber

    Messages:
    8,997
    Location:
    San Diego
    The line is under gas pressure, so as soon as a pilot or valve is opened, it will start purging out the air. If this is an igniter type gas control, it will take several tries. This is why the circuit is designed to repeat start tries.
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