Brian1000

Hi all, recently, a relay in a wiring centre for my heating gave up, it’s no longer made but was replaced with a heatmiser UH8 wiring centre. All is working but the setback facility in the first floor thermostats is not working. What I have now is, a UH8 on the ground floor connected to a 4 channel timeclock and a WATTS wiring centre on the first floor. How do I connect these systems so the setback is working??