Discuss faulty pipie stat? in the Central Heating Forum at Plumbers Forums; got a pipe stat that clicks on once frost stat signals but does not switch off? any one got any ideas. i think it is def wired up wrong as ...
Test the stat using a multimeter. If ok it is the wiring.
If you have 2 motorised valves it should be wired permanent live - frost stat - pipe stat - orange of the valves.
Mid position valve, perm live - frost stat - pipe stat - white of valve.
No valves, perm live - frost stat - pipe stat - switched live.
Frost stat should be set to around 5 deg and pipe stat fitted on the return set to around 25 deg.