advice please

[unsworth]

I have an old gravity type central heating boiler,and as I dont need the 35 gallons of hot water in my copper cylinder,I am thinking of fitting an isolating connector to the curly pipe that runs in the inside of the cylinder,so as to make it central heating only.If this will work,it would be easier in my case to fit the valve to the higher up exit pipe, I will be gratefull for any advice.

 

[david17uk]

Do you mean you never want hot water??

I don't quite understand.

Can't you just switch your programmer to "heating only"

 

[unsworth]

Thanks for reply David. I have no option of heating only (no motorised valve) We have an elec shower and only need hot water for washing dishes, cheaper to use elec kettle, trying to save cash.

 

[david17uk]

What type of system have you got?

Could you get a pic of your cylinder?

 

[seco services]

sounds like its a gravity hw pumped heating.

 

[david17uk]

So the heating has to be on to heat the hot water????

I'm confused

 

[unsworth]

my boiler is Ideal My cylinder has water feed from storage tank at lowest then boiler feed and exit, then to taps from top

 

[unsworth]

Yes gravity hot water Heating pumped

 

[david17uk]

^ Which is perfectly normal if you have a motorised valve

 

[seco services]

gravity hw pumped heating.

you have to have hw only
or hw and heating.
you can't have heating only cause hw gravity.

 

[david17uk]

How can you have HW only with no motorised valve?

 

[seco services]

if you put anything valve etc on the hw side it can't be before the vent pipe to the loft.

useally this type of system is converted to a c plan.

 

[david17uk]

Ah, I see

 

[david17uk]

Wouldn't the best option then be to link the flow and return pipes from the cylinder (so you're bypassing the coil).

Otherwise the boiler will keep heating the water up the vent pipe into the tank???

 

[seco services]

example if you had a c plan system and no call for hw (valve closed)
the boiler won't fire up so won't go up the vent pipe.