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Posted by Heatpro on December 18, 2005 at 14:23:29:
In Reply to: Re: Raypack Boiler cycling Too Often posted by danny on December 18, 2005 at 12:17:25:
You ran a steam line of a given length; but not of a given diameter; thus, you can't know if it is large enough. 75-feet long steam lines are more like mains than runouts, so you would expect to clear a LOT of air, so need a large vent. The requirement to set the thermostat higher means that you needed to give the radiator time to vent air, so install a main vent after the runout to the radiator and make sure the vent is a main vent a foot or so away from the end of the main and on an 8-inch riser above the main.