Question about Heating & Cooling
The easiest way is simply hold down the pilot lighting button until the gas pushes the air out. The longer the pipes with the air in them, the longer this takes. You are only looking at 4 PSI for natural gas, so a 20 ft line may take several minutes. You do not want a gas build up, so as you are holding down the button, hit the ignitor every 2 or 3 seconds or so. this could take 5 to 10 min solid of holding down the pilot button.
The other way is to loosen the gas line as close to the gas valve as possible to let the pressure push out the air until you smell gas.
That method can be annoying at times, and you will still need to purge the gas valve and manifold. Thus my previous suggestion. Once you statr to smell gas vapors it should light soon after.
It is not uncommon for the pilot to light, burn weakly and go out only to have to be relit a time or two due to pockets of air in the lines.
Posted on Oct 06, 2009
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Posted on Jan 02, 2017
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