hot water loop off of steam boiler


Old 11-17-08, 08:08 AM
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hot water loop off of steam boiler

we replaced our oil fired steam boiler w/a burnham independence boiler.
all but one room is a 1 zone steam system, that other room is a hot water loop. Since the reinstall, the hot water loop has not been heating properly. When that room calls for heat the boiler makes so much steam that it over-heats the entire house long before the hot water loop can warm up that one room & than continues to run 4 degrees or so past the temp setting of the thermostat. The old system had an external aquastat, that did not get replaced, could that be the missing link here? Also there is a bypass loop that I'm am not sure how to set properly. (I'll post a photo in a bit)
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Old 11-17-08, 12:00 PM
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Join Date: Jul 2007
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You do need the high limit aquastat to control the boiler so it does not make steam on a call for the hot water loop.
The bypass is a good idea to cool the water down to the baseboard loop when the water temp is up around 212. I would set it so the water leaving the boiler is about 170 when the boiler is steaming.
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