I've had this boiler for 9 years. The kettling sound started 3 winters ago. Would like to run it around 200 degrees to get satisfactory heat on the coldest days, but too much kettling noisy to accept allowing it to operate at that temperature. Lowered the boiler temp setting to 180, it's much quieter but still kettles enough to notice, especially when nearing 170 to 180 degrees. 20 lbs water pressure on gage which appears to worked correctly. Rapidly drained 2 gallons water from boiler into bucket to check for contaminates. All I saw were some rust specs. I'm on town water which is super clean and near nuetral ph. Took out burner to inspect burner compartment. Found dusting of rust specs which I take as normal, but also vacuumed up clay I believe dropped from between the boiler casting and outside insulation. Is clay droppings normal? Don' think the system has mineral build up mainly because town water quality is near ideal and I don't have mineral built up on any plumbing fixtures within the house. Air pressure in bottle is 15, checked when system pressure was relieved. Boiler heats one floor with 3 zones. Maybe the boiler is oversized, but the kettling still happens when servicing all 3 zones at once.
I'm leaning towards believing the boiler casting is the issue. Any thoughts what else to chec that could be causing kettling? It didn't do this when it was new.
Thank you in advance
Mike Menard
Dartmouth Ma
↧