No hot water, CH brilliant, BG says powerflush?

ollski

Its not strictly a bypass, it's the hw circs.

gas4you

Agree about the valve, looks suspiciously like a 2 port to me, in which case I would suspect it is just the microswitch gone in the valve head.

But, I cannot see the dimple on the valve head in those pics, so maybe a complete valve would be needed.

IF it is a 3 port valve, has anyone checked the cylinder stat? The power for the hot water to come on on its own is supplied direct from the cylinder stat with a 3 port.

keystone

ollski wrote: »

Its not strictly a bypass, it's the hw circs.

Is it? For sure? Not convinced about your dip tube suggestion either tbh. OP please describe where that pipe goes to and if possible show us the pipework for the flow to and return from the cylinder coil.

gas4you wrote: »

Agree about the valve, looks suspiciously like a 2 port to me, in which case I would suspect it is just the microswitch gone in the valve head.

So OP - could we get a pic looking from the LHS at the pipework that is obscured in the present pics.

But, I cannot see the dimple on the valve head in those pics, so maybe a complete valve would be needed.

Agreed as that would make it a much older valve and not possible to remove the head for testing operation of stats. OP can you say what the valve model number is please? Its out of focus on your pics.

Cheers

ollski

come on guys, it's a 'C plan' or 'W plan' (can't check wiring). The 15mm on the feed before the zone valve goes up to the dip tube which is screwed into the immersion tapping then back into the return. There is no question it will be blocked it is just weather the bend of the dip tube or the iso.

keystone

ollski wrote: »

come on guys, it's a 'C plan' or 'W plan' (can't check wiring). The 15mm on the feed before the zone valve goes up to the dip tube which is screwed into the immersion tapping then back into the return. There is no question it will be blocked it is just weather the bend of the dip tube or the iso.

You could be right but without seeing the other ends of the pipework being definitive could well bite you on the bum. Thats all I'm saying.

To my mind its neither C nor W as plumbed - its possibly S with the other zone valve in another location perhaps. Nowhere near enough data.

Cheers

ollski

Yes maybe but you can see the 15mm flow before the zone valve with the iso on it and you can see the other pipe behind it into the return and that is the only scenario I commonly see cylinder feeds blocked....not a huge leap of faith.

keystone

ollski wrote: »

Yes maybe but you can see the 15mm flow before the zone valve with the iso on it and you can see the other pipe behind it into the return and that is the only scenario I commonly see cylinder feeds blocked....not a huge leap of faith.

LoL - I'm clearly not as confident as you. I'd like to know where they actually go to tbh. Lets see.

Cheers

ollski

Best pic i could find

keystone

ollski wrote: »

Best pic i could find

Thats a solar one isn't it to be fitted in the bottom IM heater location to avoid exchanging the cylinder when installing solar. Horribly inefficient - but perhaps thats a clue as to poor DHW performance.

Is that really likely that one of these would be fitted as the primary heat source on an older system like this? Well I guess possibly if theres solar involved.

Still like to see the cylinder connections please OP.

Cheers

ollski

That one is, but it's just a standard old fashioned dip tube. fitted to most systems mid 70's especially council installs round here.