P
Plucky
I had a call out to a problem with 2 glow worm energysave boilers which are running in tandem. They have been converted over to LPG. Sypmtoms were that the boilers were cutting out and causing overheat stat to trip (manual reset on these boilers)
First thing I done was stick my analyser in and found one boiler circa 500ppm co and the other over 700ppm. Stripped and cleaned as they didnt look like they had ever been cleaned (although someone has been servicing yearly, yeah right!) Both boilers burning under 60ppm with decent ratios)
However customer still reports same fault. The only way they can keep the boilers running at the moment is to turn these boilers to theyre summer setting and turn the stat right down low. These boilers have a high(winter) setting and a low(summer setting) when on low they kick out approx 12kw and on high I think around 24kw.
A previous plumber has changed the pump which hasnt made a difference.
I am thinking of checking the quality of the water in the system and am thinking maybe heat exchangers are sludged up? I find it hard to believe a mechanical fault with 2 seperate boilers occuring at the same time. Its as if the flow rate through the boilers isnt enough.
I know 40kw is miles too much to heat a cylinder of water twice a day but they still shouldnt overheat. The stats should just cut the boilers out and they would cycle alot not trip overheat stat surtely?
System has an auto bypass and even when fully open the same fault.
Any ideas???
First thing I done was stick my analyser in and found one boiler circa 500ppm co and the other over 700ppm. Stripped and cleaned as they didnt look like they had ever been cleaned (although someone has been servicing yearly, yeah right!) Both boilers burning under 60ppm with decent ratios)
However customer still reports same fault. The only way they can keep the boilers running at the moment is to turn these boilers to theyre summer setting and turn the stat right down low. These boilers have a high(winter) setting and a low(summer setting) when on low they kick out approx 12kw and on high I think around 24kw.
A previous plumber has changed the pump which hasnt made a difference.
I am thinking of checking the quality of the water in the system and am thinking maybe heat exchangers are sludged up? I find it hard to believe a mechanical fault with 2 seperate boilers occuring at the same time. Its as if the flow rate through the boilers isnt enough.
I know 40kw is miles too much to heat a cylinder of water twice a day but they still shouldnt overheat. The stats should just cut the boilers out and they would cycle alot not trip overheat stat surtely?
System has an auto bypass and even when fully open the same fault.
Any ideas???
