Gledhill, Sludgebucket?

ChrisR · 2 Dec 2006

It went in at new build, 15 years ago. One of the 7kW ones with the thermal store on top. Cust complaining that he only gets about 4" of hot enough water in the bath.
Store feels ok (too hot to hold a hand on) and the level is ok, so all I can think is that it's only half full of water, the rest being rust. Couple of rusty rads...

Common?
Could dangle the aquavac hose in I suppose.....

doitall · 2 Dec 2006

Whip the pumps out I expect they are solid.

ChrisR · 3 Dec 2006

Doesn't have one on hw. CH is working

doitall · 3 Dec 2006

the two pumps between boiler and store

nickso · 3 Dec 2006

gulfstream? horrible boiler. got an estate full of them. they have a nasty habit of overheating and turning the house into a sauna

it'll be the mixing valve probably.

doitall · 3 Dec 2006

nickso said:
gulfstream? horrible boiler. got an estate full of them. they have a nasty habit of overheating and turning the house into a sauna

it'll be the mixing valve probably.

Don't let Water Systems hear you say that

I would think Chris is talking Mk II

ChrisR · 3 Dec 2006

There's only one pump between boiler and store, swym, the HW just runs through the store by mains pressure. The store is heated 24/7 so in the morning it should be all hot even if the pump isn't doing much. With 7kw it would take a while anyway!

The HW is (very) hot out of the mixing valve, it just "runs out" earlier than would seem right. Unless you mean they produce CW randomly??

This one would be hard to replace - cupboard, conventional flue, 15mm gas..

corgiman · 3 Dec 2006

every gledhill I go to is sludged up as the installer just dont seem to realise that a litre of fernox just aint enough to treat a system with an additional 80 litres of water in the heat store

I also find that the mixing valves on these are rubbish and I have to replace ones not even two years old.

maybe try a new one chris?

ChrisR · 3 Dec 2006

maybe try a new one( mixing valve) chris?

Don't understand how that would restrict (apparent?) HW volume. Which way do they fail? This one as I say is giving v hot water - probably unmixed.

Has anyone exp of the "bucket" filling up with sludge?

corgiman · 3 Dec 2006

cant say I have ever seen one full up but pretty close

I meant that if the blending valve aint intiall mixing then the hot water goes cold then its most likely boogered and needs replacing

how long does the hot water last?

whats the temperature of the rads> maybe the primary thermister is knockerd and not heating the heat store up enough

as you can probably tell I aint no expert

Sider · 3 Dec 2006

ChrisR wrote

Which way do they fail?

I think they should fail safe. Hot water shutdown.

Sider · 3 Dec 2006

corgiman wrote

and not heating the heat store up enough

But the OP says the store is producing very hot water.

corgiman · 3 Dec 2006

but sider chrisr says that it drops very quickly?

Sider · 3 Dec 2006

ChrisR wrote

Has anyone exp of the "bucket" filling up with sludge?

Whats a "bucket" ??.
Are you referring to a catchment area for sediment and using a less technical expression ??.

Sider · 3 Dec 2006

ChrisR wrote

The HW is (very) hot out of the mixing valve, it just "runs out" earlier than would seem right.

AAh Yes.
If only hot water is being dumped out and no mixing taking place then perhaps it is likely the system cannot keep up with hot water production.

What volume is inside these for hot water production anway ??.

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Gledhill, Sludgebucket?

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