My central heating/hot water system. Ariston model dia system 27rff1 serial No: 971009407
with the central heating no problem. once the central heating go,s off the hot water system trips on high temp;

clive, February 2010

make sure a bypass has been piped into the system so the pump water has somewhere to overrun to

john, February 2010

sorry should havbe said that this is a requirement so if your sysstem has been recently installed notify your electrician or installer

adam dowsing, February 2010

you need a permanent live supply from the spur to the boiler which doesn't run through any of the stats or programmer. There should be a place in the wiring centre of the boiler for this marked or pump over run. You then need to mke sure the pump and boiler triggers are common to ensure the boiler can tell the pump to continue to run.

adam dowsing, February 2010