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Posted by HeatPro on December 10, 2007 at 12:00:13:
In Reply to: Re: 2 issues, possibly related... posted by Greg on December 10, 2007 at 10:05:53:
You should be able to shut off the boiler and remove it without draining any water. yes.
use as thermal grease; forgo the putty.
Normally, due to heat transfer delay the gauge lags behind the thermometer, and when rising the thermometer lags behind the gauge.
I tried to make sure the circulator was running... the thermometer topped out at about 194, when the gauge topped out at about 215
++ It is possible for parts of the boiler at the top castings to have hotter water than that which flows through. However, a control near the same spot should turn the burner off near the setting; so that is what you want to establish.
when I removed the gauge it was wet... tank feels almost room temp on the bottom, definitely warmer on top, tapping with a screwdriver handle sounded solid near the top, and hollow beneath the weld, but solid again right on the bottom...
++ a sign to change the expansion tank.