Pump over run problem

[Robert Tyrrell]

Good evening, you fine people.
I have just been on a call where I found that the pump is constantly pumping over into the header tank and I can't come up with a solution at the moment so I wondered if any of you might have an idea or two
Basically, the boiler is downstairs and the unvented cylinder is upstairs, with the pump next to it. The F&E tank is just above the cylinder (less than 1 mtr).
Have a look at the photo and if anyone can help I'd appreciate it

 

[ShaunCorbs]

what boiler is it?

 

[dancinplumba]

Pump wrong way round ?

 

[Robert Tyrrell]

It's a Danesmoor 32/50 oil boiler - and the pump is the correct way around but i think that it's before the vent and not after so that might be the cause.
If I can't work it out I'll just with the F&E and set it up as a sealed system

 

[ShaunCorbs]

best bet if you could is pressurize the system and do away with the f and e tank

 

[Geyser]

Hard to tell. But you might want to sort out that d2 discharge pipework while your at it!!

 

[Geyser]

Thats shocking. Id make sure i checked over the whole installation if were you. Looks like your options are sealed system or moving expansion back to before pump by feed pipe. Id pressurize it i think.

 

[SimonG]

Is it me or does the d2 tee into the f&e overflow?

 

[Geyser]

It sure does. And blank installer details on cylinder!

 

[ShaunCorbs]

Is it me or does the d2 tee into the f&e overflow?

you are right your eyes are still ok

 

[SimonG]

So it doesnt make you go blind after all. Phew.

 

[ShaunCorbs]

So it doesnt make you go blind after all. Phew.

if you add a bit of lead/ drinking out of a lead beaker yes

 

[Chalked]

The vent is taken off before the hot water motorised valve. Will pump over for sure.
Either needs vent teeing in before pump and an auto blpas between flow and return. Or just pressurise.

 

[Robert Tyrrell]

Thanks Chalked, that's what I was thinking, about the vent that is, but I'd forgotten about the auto bypass.
I'll have another look tomorrow but I think that I'm going to go for the sealed option.
Now to work out the vessel size - oh my, what have I just found in my GSR mag?