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Posted by HeatPro on September 17, 2008 at 10:55:25:
In Reply to: New Boiler posted by Boston on September 17, 2008 at 10:32:18:
Good operation is to have steam up with all radiators heating in ten minutes. In the cold winter, a run time of 45 minutes out of the hour is good.
Unfortunately, many install boilers with burners larger than required for the radiation, which makes the heat-up time very short. The water dropping shouldn't occur, so you have proof that the water is being thrown out of the boiler from too quick input. The pressure overshoot is another indication of excessive burner input; though new boilers have thinner castings that heat up faster than the old and usually carry less water in the boiler, often requiring some design 'fixes' to adjust the new boiler to the installation.
Several checks of what the burner input is on the nameplate, make and model of boiler, the radiation square feet of surface and other info can further inform about solutions to your incorrect installation.
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