Could someone in the group answer this question as to whether my CH system is correctly wired. To my mind it isn't:-
Its an oil fired boiler, fully pumped with a motorised 3 position (HW, CH & Both) 5 wire motorised valve, HW cylinder stat and room stat. And a 2 channel programmer.
With the programmer calling for CH and HW the 3port valve settles at the both position and the boiler runs. This is all fine. However if then the HW cylinder reaches 'stat temperature the whole lot cuts out. To my mind in this condition the 3 port valve ought to move to the CH position and the boiler relight until such time that the HW cylinder stat again calls for heat.
Is this correct or not? If not, how do I correct it, and if it is correct, can I mod it to work as I desire??
Cheers
Tim..