Hi Guys,
Worst type of post -- amatuer heating engineer warning !!!!
I have a five year old house with a Gloworm F55 boiler and Danfoss controls. It's a system with a mid position valve control. Recently the hot water has been scalding hot, the system seems to function normally apart from this with CH and HW running OK. Therefore thought this was the Danfoss AT cylinder thermostat failed so after testing it ( It didn't switch off at all) I replaced it with a Landis & Gyr (Wickes) type.
Wiring diagrams are a bit useless as the original installers have wired the main terminal block back to front ( e.g. the connectors run from 10 back to 1 rather than the other way round. However, I THINK I've got the connections right as the thermostat switches in when I raise the temperature with HW only switched on, it calls for heat and switches off again when temperature set on the thermostat is reached. However, when the CH is also switched on, it seems to keep pumping hot water to the tank! Could this be a mid position valve problem? I can hear it switching from time to time, but can't easily identify if it's switching the right way round. Also as the connection block is the wrong way round it's difficult to check the wiring in case I have inadvertantly wired something the wrong way round.
Any help would be greatly appreciated.
Regards
PaulB69
Worst type of post -- amatuer heating engineer warning !!!!
I have a five year old house with a Gloworm F55 boiler and Danfoss controls. It's a system with a mid position valve control. Recently the hot water has been scalding hot, the system seems to function normally apart from this with CH and HW running OK. Therefore thought this was the Danfoss AT cylinder thermostat failed so after testing it ( It didn't switch off at all) I replaced it with a Landis & Gyr (Wickes) type.
Wiring diagrams are a bit useless as the original installers have wired the main terminal block back to front ( e.g. the connectors run from 10 back to 1 rather than the other way round. However, I THINK I've got the connections right as the thermostat switches in when I raise the temperature with HW only switched on, it calls for heat and switches off again when temperature set on the thermostat is reached. However, when the CH is also switched on, it seems to keep pumping hot water to the tank! Could this be a mid position valve problem? I can hear it switching from time to time, but can't easily identify if it's switching the right way round. Also as the connection block is the wrong way round it's difficult to check the wiring in case I have inadvertantly wired something the wrong way round.
Any help would be greatly appreciated.
Regards
PaulB69