No hot water, CH brilliant, BG says powerflush?

zaax

Use a local plumper they are cheaper and more reliable than a bg plumber that is sent from miles away and may not get to you in the snow.

ollski

zaax wrote: »

Use a local plumper they are cheaper and more reliable than a bg plumber that is sent from miles away and may not get to you in the snow.

Oh come on, snow won't affect bg 'plumpers'. They have flying vans you know.
I think you have massively more chance of bg getting to you in heavy snow than your local guy who has more work than he can shake a stick at!

keystone

ollski wrote: »

I am a little confused with reference to a calorifier, it suggests it's not a standard system. Is the (a) pump running when you turn on the hot water on its own?

Calorifier is a technical term for what you and I would call the HW Cylinder. Simples.

Cheers

ollski

keystone wrote: »

Calorifier is a technical term for what you and I would call the HW Cylinder. Simples.

Cheers

Hmmm maybe, but not a term I have ever heard used for anything other than a plated heat exchanger on the side of a thermal store type cylinder

keystone

A calorifier is a means of generating heat in a mass of stored water. Where's the "maybe" come into that?

The coil inside the indirect cylinder does exactly the same job as a plate heat exchanger on the side of your thermal store.

Cheers

C_Mababejive

Are you in a hard water area?

It could also be a blocked CH system cold feed if the CF to the CH system has been teed into the HW return as was common practice. Id thats the case, it will likely just need cutting out and possibly upsizing. I doubt it will be a faulty valve as that would be very easy to diagnose. A few pics of said valve and HW cylinder connections would be useful.

ollski

keystone wrote: »

A calorifier is a means of generating heat in a mass of stored water. Where's the "maybe" come into that?

The coil inside the indirect cylinder does exactly the same job as a plate heat exchanger on the side of your thermal store.

Cheers

The maybe is not to question your dictionary definition, it is purely to relating it to the terminology used to try and advise the ops original problem. I have never heard anybody refer to a coil as a calorifier in the last 30 years and if I did I'd probably 'accidently' trip them down the stairs. :-)

tillycat123

keystone wrote: »

I know you said engineer said he checked valve but please say do you have one of these:



or perhaps one or more of these:



in either case the actuator head might not look exactly like these pics.

Is it possible to see a pic of the pipework round the cylinder please? There will be more questions after seeing that.

Is your cylinder vented or unvented? Does it have any markings to identify it? Manufacturers Name / Model Number etc.

If its a standard indirect vented cylinder (which is a reasonable guess from the description thus far) and you get DHW whilst CH is on but not when DHW only is selected then that sort of indicates that certainly under one condition you are getting circulation via the coil which sort of suggests that the coil in the cylinder isn't blocked. There may, however, be a blockage somewhere else.

Have a look at this:



The three way valve shown is the same as the first image I posted (note the immersion isn't shown but please say if you do have a bypass valve on the primary as shown. In some installations the towel warmer in the bathroom is connected across the primaries and doubles as a bypass). In what order do the pipes get hot on your installation if you just have DHW selected. Same for CH. How far from the boiler to the cylinder do the pipes pipe get hot whenDHW selected on its own and ditto for CH selected.

Cheers

Could i just hijack this thread to ask a question, hope you don't mind!

The three way valve, does that have a red spiny wheel also on it? If it does then could I ask if its an expensive and difficult part to have replaced. Mine is really furred up, white and green and seems to have black sticky on the underside. I was not sure if it was a very small water leak starting.

Should I be concerned?


Many thanks

ollski

the sunvic valves have that knurled red wheel and are also prone to the spindle leaking. Its never a particularly easy job to repair a water carrying part but the time taken will vary hugely from one system to another

keystone

tillycat123 wrote: »

Could i just hijack this thread to ask a question, hope you don't mind!

Might as well - despite lots of feedback on this seemingly urgent issue OP hasn't been back for two days!

Cheers