Lectrician

Hi could I change a Honeywell t6360 to any thermostat

https://www.dropbox.com/s/9jq301zkxbr3aa0/fermax%20basic%20loft%203393%20%283%29.JPG?dl=0 this the inside of it and this is the old system, the wiring to the new isn't attached just sitting lose https://www.dropbox.com/s/1pmgslu3q8u9jp0/DSC06676.JPG?dl=0

i bought a fermax loft phone entry reference 3393 and i cannot work out how to wire it up as the markings numbers are all diferent from the older phone entry. it is a basic phone answer with key button door release. do you know anyone who knows or specializes here on screwfix forums

i was doing a zs on a 32A ring main on a tt system i was getting 19 ohms what would be my next step be to lower that value?