Hi, my first post here as a newbie so hopefully I've got this right.
I'm a qualified spark so no issues regarding regs etc.
I've today changed a Drayton Tempus Three to a Drayton wiser kit two.
Wiring at the programmer/time clock exactly the same as the wiser two a simple swap over.
All seemed to work fine until only CH is selected, the CH pump fires up but not the boiler.
Turn the HW on aswell boiler kicks in all works ok.
The previous controller if selecting CH the HW would also automatically be selected too.
The system has boiler on ground floor, central heating tank upstairs, mains cold water fed not gravity from loft.
Tank has two grundfos pumps one pump back and forth the boiler and the other for central heating. On the old controller when selecting CH both pumps would run, when selecting HW only one pump would run.tgere are no two / three way valves on this system
The old stat has been linked out.
Could anyone help me here, as the above if CH switched on it doesn't bring in HW water pump to heat tank so the radiators are flowing cold water until I manually switch on HW.
Any help will be great appreciated
I'm a qualified spark so no issues regarding regs etc.
I've today changed a Drayton Tempus Three to a Drayton wiser kit two.
Wiring at the programmer/time clock exactly the same as the wiser two a simple swap over.
All seemed to work fine until only CH is selected, the CH pump fires up but not the boiler.
Turn the HW on aswell boiler kicks in all works ok.
The previous controller if selecting CH the HW would also automatically be selected too.
The system has boiler on ground floor, central heating tank upstairs, mains cold water fed not gravity from loft.
Tank has two grundfos pumps one pump back and forth the boiler and the other for central heating. On the old controller when selecting CH both pumps would run, when selecting HW only one pump would run.tgere are no two / three way valves on this system
The old stat has been linked out.
Could anyone help me here, as the above if CH switched on it doesn't bring in HW water pump to heat tank so the radiators are flowing cold water until I manually switch on HW.
Any help will be great appreciated