Home |
Search |
Today's Posts |
|
UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
|
#1
Posted to uk.d-i-y
|
|||
|
|||
Flushing Combi - Necessity
I've recently had an extension built with a new Glow Worm 30ci combi
boiler fitted. There is a little old pipework remaining and one small rad otherwise the system is new. My previous gravity system gave no trouble, apart from the occasional pump, it worked faultlessly but owing to a need for instant hot water I went for a combi. After 16 months the secondary heat exchanger failed, as I had not had the apparently mandatory service this was not covered by warranty so I had a very expensive repair. The service engineer said this was due to the system not being flushed as the heat exchanger was blocked. I am now led to believe that system flushing appears to be a necessary requirement for combis due to the design, how important is this flushing, I would have thought any modern boiler should have some filtering system to prevent fouling of the internals. Geoff Lane |
#2
Posted to uk.d-i-y
|
|||
|
|||
Flushing Combi - Necessity
In article ,
Geoff Lane writes: I've recently had an extension built with a new Glow Worm 30ci combi boiler fitted. There is a little old pipework remaining and one small rad otherwise the system is new. My previous gravity system gave no trouble, apart from the occasional pump, it worked faultlessly but owing to a need for instant hot water I went for a combi. After 16 months the secondary heat exchanger failed, as I had not had the apparently mandatory service this was not covered by warranty so I had a very expensive repair. The service engineer said this was due to the system not being flushed as the heat exchanger was blocked. Which side blocked? If you are in a hard water area, you can expect the secondary side to scale up. I recently descalled a friend's one in Baxi 105, but that took 4 years to block, with a family of 5 including two babies. I am now led to believe that system flushing appears to be a necessary requirement for combis due to the design, how important is this flushing, I would have thought any modern boiler should have some filtering system to prevent fouling of the internals. There shouldn't be any new debris appearing in the heating circuit in the first place (at least not within 16 months). -- Andrew Gabriel |
#3
Posted to uk.d-i-y
|
|||
|
|||
Flushing Combi - Necessity
"Andrew Gabriel" wrote in message .. . In article , Geoff Lane writes: I've recently had an extension built with a new Glow Worm 30ci combi boiler fitted. There is a little old pipework remaining and one small rad otherwise the system is new. My previous gravity system gave no trouble, apart from the occasional pump, it worked faultlessly but owing to a need for instant hot water I went for a combi. After 16 months the secondary heat exchanger failed, as I had not had the apparently mandatory service this was not covered by warranty so I had a very expensive repair. The service engineer said this was due to the system not being flushed as the heat exchanger was blocked. Which side blocked? If you are in a hard water area, you can expect the secondary side to scale up. I recently descalled a friend's one in Baxi 105, but that took 4 years to block, with a family of 5 including two babies. Sounds like crud in the primary side. I am now led to believe that system flushing appears to be a necessary requirement for combis due to the design, how important is this flushing, I would have thought any modern boiler should have some filtering system to prevent fouling of the internals. Desludging is needed in all systems not just combis. Also fit a Magaclean filter on the CH return, as this will catch debris and iron. There shouldn't be any new debris appearing in the heating circuit in the first place (at least not within 16 months). Depends on how much crud was already in the old system. The Glow Worms are good boilers, and a failure like this is very rare. |
#4
Posted to uk.d-i-y
|
|||
|
|||
Flushing Combi - Necessity
On Sat, 19 Nov 2005 10:22:00 -0000, "Doctor Drivel"
wrote: Desludging is needed in all systems not just combis. Also fit a Magaclean filter on the CH return, as this will catch debris and iron. Are these easy to fit. Geoff Lane |
#5
Posted to uk.d-i-y
|
|||
|
|||
Flushing Combi - Necessity
"Geoff Lane" wrote in message ... On Sat, 19 Nov 2005 10:22:00 -0000, "Doctor Drivel" wrote: Desludging is needed in all systems not just combis. Also fit a Magaclean filter on the CH return, as this will catch debris and iron. Are these easy to fit. http://tinyurl.com/atx7n http://www.magnaclean.co.uk |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
combi vs conventional | UK diy | |||
Pros and cons of combi boilers? | UK diy | |||
new combi experience report | UK diy | |||
Combi Boilers | UK diy | |||
power flushing | UK diy |