Thank you gentlemen for allowing me to query your expertise.
Equipment: grant 50/70 boiler was attached to a horstmann h21xl switch. No room thermostat. Timed on/off. Could only have heating on with water on.
Moved in six months ago and thought I'd update to a smart thermometer, because I'm a bit of a geek and like new shiny things, if if they aren't particularly useful.
So, swapped the horstmann over for a nest 3rd gen today. Used the old wiring diagram and the nest instructions to try to do the job.
Only didn't go to well. Strangely the central heating side now appears to be working independently to the water heating side. But the water heater does not work:the boiler does not fire up.
I appear to have pumps for both sides of the system. There is an immersion heater upstairs, with a thermostat. This seems to feed into the wiring from the water side pump (please see photo). The yellow wire from the immersion thermostat is it seems attached to the brown wire from the water pump. The red wire from upstairs is then fed into 6, call for hot water.
Forgive the state of the wiring-this off course will be tidied up once the system appears to be working properly.
Can anyone give me advice as to why my water heating system is not working. I also presume I have to remove in any case this immersion heater thermostat?
Many thanks in advance.
Equipment: grant 50/70 boiler was attached to a horstmann h21xl switch. No room thermostat. Timed on/off. Could only have heating on with water on.
Moved in six months ago and thought I'd update to a smart thermometer, because I'm a bit of a geek and like new shiny things, if if they aren't particularly useful.
So, swapped the horstmann over for a nest 3rd gen today. Used the old wiring diagram and the nest instructions to try to do the job.
Only didn't go to well. Strangely the central heating side now appears to be working independently to the water heating side. But the water heater does not work:the boiler does not fire up.
I appear to have pumps for both sides of the system. There is an immersion heater upstairs, with a thermostat. This seems to feed into the wiring from the water side pump (please see photo). The yellow wire from the immersion thermostat is it seems attached to the brown wire from the water pump. The red wire from upstairs is then fed into 6, call for hot water.
Forgive the state of the wiring-this off course will be tidied up once the system appears to be working properly.
Can anyone give me advice as to why my water heating system is not working. I also presume I have to remove in any case this immersion heater thermostat?
Many thanks in advance.