A friend has moved into a new small house and I was trying to sus out her heating system as she has no independant control of her HW. It looks like there's only one time clock that turns everything on & off.
I assumed at first that it would be on older system utilising thermosyphon for the HW and pump for the CH but when I looked in her airing cupboard at the tank, I discovered that the coil is plumbed with a mixture of 15mm and
8mm pipework and it has lots of right angled bends so I don't think theres anyway that's working without a pump!As far as I can make out, the boiler (a wall mounted open vented Baxi of some sort) has only a single inlet & outlet.
My friend would like to be able to have HW only in the summer but it seems that the only way to do that is to turn off all the radiators.
What would be the simplest way of achieving this? My first thought was to add a motorised valve or two but finding where the CH system pipework diverts from the HW tank circuit might not be easy. Alternatively, could one add a second pump in the airing cupboard to circulate water just to the tank (bearing in mind the 8mm pipework)? The radiators are all plumbed with
8mm pipes and the upstairs radiators are very slow to warm so there may be sludging issues with the system. Some water I had to drain off to fix a leaking connection was clear though.Tim