Just moved into and old house and trying to get the CH and HW bill under control.
The CH and HW run on two separately pumped zones but re-combine into one at the boiler for heating.
Current programmer has HW on as a constant default, with the option to have CH on in addition.
So the HW needs to be on to also then call for CH.
I am installing a Wiser smart therm with 2 zones.
The HW zone works fine as 'boiler live' and 'pump live' are connected (fires boiler and pumps HW to cylinder)
The CH zone doesn't (it cant fire boiler as not connected to 'boiler live' but does pump the CH circuit)
How can I insert some logic (relay?) to allow the smart thermostat to pass switched live to the boiler via EITHER the CH or HW live output from the smart control so I can run CH and HW separately.
Pic attached to help explain!
The CH and HW run on two separately pumped zones but re-combine into one at the boiler for heating.
Current programmer has HW on as a constant default, with the option to have CH on in addition.
So the HW needs to be on to also then call for CH.
I am installing a Wiser smart therm with 2 zones.
The HW zone works fine as 'boiler live' and 'pump live' are connected (fires boiler and pumps HW to cylinder)
The CH zone doesn't (it cant fire boiler as not connected to 'boiler live' but does pump the CH circuit)
How can I insert some logic (relay?) to allow the smart thermostat to pass switched live to the boiler via EITHER the CH or HW live output from the smart control so I can run CH and HW separately.
Pic attached to help explain!