Fitting Cistern into existing system

[chausseraie]

Hi,

Done a search on this but can't see what I need, forgive me if it's been covered before.

I live in France in a house with an oil fired central heating system which uses a French manufactured Ideal Standard 2001 boiler. The boiler also supplies hot water from an internal tank which is quite small, circa 60 litres I think. We need more hot water and it is quite common over here to have a cistern with an immersion heater acting as the main source of hot water.

My question is, how to install the new tank, should it be in series with the existing system or in parallel? I think it should be in parallel but I can't see what would stop the hot water from the new cistern flowing into the boiler's hot water tank which would be very wasteful. During the summer, the boiler will not be used and the cistern will be the only source of hot water.

I am quite capable of the fitting and plumbing required so if someone could point me at a drawing of the sort of system I am talking about, I would be very grateful.


Thanks

 

[Softus]

Hi

I notice that you've used the words "cistern" and "tank" interchangeably. Not that this is uncommon, but it's made it impossible to work out what you have and what you want to have.

In the context of this topic, if you regard a "tank" as being a vessel enclosed on all sides, and a "cistern" as being a open-topped vessel with a float valve, then please could you restate what you currently have, and put your proposed changes in terms of the symptoms that you want them to alleviate?