Anyone used Honeywell programmable Thermostat with Air Source Heat pump

[alix]

I have a Dakin Altherma Air source Heat pump running low temperature radiators and want to replace my conventional timer with a wireless programmable thermostat. Everyone seems to recommend Honeywell [CM927]but I know these have TPI and wondered if this would be an issue with my heat pump. Any views greatly appreciated
Thanks

 

[Roger Welton]

you will have to adjust the cycle time and duration in the installer mode to suit the heat source