A bit of history first. 2 yrs ago visited a grant boiler with boiler and pipework kettling. I added SentX200 noise reducer.
It is standard open vented system S plan Also found there was no bypass and this was an external boiler with frost stat so boiler would start with no valves open... Client a few days later agreed it needed more work.
I then drained and installed an auto bypass also replaced the air separator and feed pipe (starting to fur) added 2 x sentinel X400 and allowed to clean for 8 days. Then drained and flushed through a few times added 2 x bottles X100 inhibitor. Returned a few days later to check header tank was checking water level to see if leaks as estate has history of screaded copper pipes leaking. Also why don't want to convert to sealed system.
At this point I added another bottle of X200 noise reducer.
All worked fine and quiet until today on a service I could hear it start to kettle again.. and the over heat had tripped.
Mag filter had a bit of sediment in it. I checked the boiler temp with a temperature probe in a spare probe pocket and at 1/2 temp dial setting the water temp would get to about 88deg then shut off then on as usual until hot water cylinder satisfied, when pump and boiler would switch off. The residual heat in the boiler would then rise from 88 to 104 deg and Kettling starts for a few minutes. Didn't trip overheat this time. I've turned the stat down a bit .
Q. Have I done anything above wrong for this to come back?
Q. Does the sentinel X200 noise reducer need topping up or is it meant to last...
Q. Could the temp stat be faulty, do they go out of sink? or could this be just boiler scale build up giving a delayed temp reading.
Any ideas feedback and suggestions welcome.
It is standard open vented system S plan Also found there was no bypass and this was an external boiler with frost stat so boiler would start with no valves open... Client a few days later agreed it needed more work.
I then drained and installed an auto bypass also replaced the air separator and feed pipe (starting to fur) added 2 x sentinel X400 and allowed to clean for 8 days. Then drained and flushed through a few times added 2 x bottles X100 inhibitor. Returned a few days later to check header tank was checking water level to see if leaks as estate has history of screaded copper pipes leaking. Also why don't want to convert to sealed system.
At this point I added another bottle of X200 noise reducer.
All worked fine and quiet until today on a service I could hear it start to kettle again.. and the over heat had tripped.
Mag filter had a bit of sediment in it. I checked the boiler temp with a temperature probe in a spare probe pocket and at 1/2 temp dial setting the water temp would get to about 88deg then shut off then on as usual until hot water cylinder satisfied, when pump and boiler would switch off. The residual heat in the boiler would then rise from 88 to 104 deg and Kettling starts for a few minutes. Didn't trip overheat this time. I've turned the stat down a bit .
Q. Have I done anything above wrong for this to come back?
Q. Does the sentinel X200 noise reducer need topping up or is it meant to last...
Q. Could the temp stat be faulty, do they go out of sink? or could this be just boiler scale build up giving a delayed temp reading.
Any ideas feedback and suggestions welcome.