Hello all,
I have a rental (gravity system, Baxi bermuda back boiler) on which I have replaced the mid position valve head as it was old and worn out.
Testing the system it works as it should, individually. But, If I set the controller to control the system, constant or timed, which ever I select first is the one that the controller operates.
Select CH then HW, room stat ON, Tank stat ON, the boiler and pump fire up, rads heat up. Room stat OFF, boiler drops out. pump keeps running, valve does not change over, Water does not heat.
Select HW then CH, room stat ON, Tank stat ON, valve changes over, boiler and pump fire up, tank heats up, Room stat has no effect. Tank stat OFF, Boiler and pump shut down. Tank stat back ON, boiler and pump fire up again???
Have I accidently pulled a wire in the connection box?
I'm sure I wired the new head in as the old was connected.
Has the controller given up as well???
Any advice appreciated.
Many thanks in advance.
I have a rental (gravity system, Baxi bermuda back boiler) on which I have replaced the mid position valve head as it was old and worn out.
Testing the system it works as it should, individually. But, If I set the controller to control the system, constant or timed, which ever I select first is the one that the controller operates.
Select CH then HW, room stat ON, Tank stat ON, the boiler and pump fire up, rads heat up. Room stat OFF, boiler drops out. pump keeps running, valve does not change over, Water does not heat.
Select HW then CH, room stat ON, Tank stat ON, valve changes over, boiler and pump fire up, tank heats up, Room stat has no effect. Tank stat OFF, Boiler and pump shut down. Tank stat back ON, boiler and pump fire up again???
Have I accidently pulled a wire in the connection box?
I'm sure I wired the new head in as the old was connected.
Has the controller given up as well???
Any advice appreciated.
Many thanks in advance.