I have an old boiler (gravity system)I want to change and also update the system to fully pumped. I have read the 'Gravity HW/Pumped Heating - Need Help' thread with interest as I have a similar system. The S-Plan system looks good but I have a couple of things I am unclear about and would like answered before deciding.
If I instal a Potterton Kingfisher boiler it has a manual reset overheat cutout and from the thread I understand that the cold feed from the F & E can be teed into the Vent and both connected into the 'flow' from the boiler? (My feed and vent are both at the cylinder location)
If I instal the pump at the boiler before the HW & CH pipes split, instal a 2-port valve in the CH flow pipe at the boiler position and a
2-port valve in the HW circuit either after the vent take off at the cylinder or in the HW return pipe at the boiler location, is this feasible? The pump would be in the circuit between the boiler and vent pipe. Is the pump classed as a valve and therefore interrupting the path between boiler and vent?