need to replace thermostat help

[baza455]

Hi, cm921 honeywell thermostat is old and need a new one so i ordered a new replacement (picture below). This new one i bought which is coming tomorrow has a receiver not sure if I have to wire it up but I assume i have to, its hannicks brand but ill see if it can pair with honeywell maybe it does idk, so I was thinking if I won't be needing the wired honeywell receiver at the boiler I can just make sure theres no voltage running through it by turning off cb and testing with my fluke pen (i know I will be buying a 2 pole voltage and cont' tester soon) and replace it with the new one?


also if I had to isolate the honeywell receiver, Do i need to trail the wires back into the boiler and disconnect them? or just tape off the ends

I will drop some pictures below

[Valiant boiler]

 

[PS Electrics]

Hi, cm921 honeywell thermostat is old and need a new one so i ordered a new replacement (picture below). This new one i bought which is coming tomorrow has a receiver not sure if I have to wire it up but I assume i have to, its hannicks brand but ill see if it can pair with honeywell maybe it does idk, so I was thinking if I won't be needing the wired honeywell receiver at the boiler I can just make sure theres no voltage running through it by turning off cb and testing with my fluke pen (i know I will be buying a 2 pole voltage and cont' tester soon) and replace it with the new one?


also if I had to isolate the honeywell receiver, Do i need to trail the wires back into the boiler and disconnect them? or just tape off the ends

I will drop some pictures below

[Valiant boiler]

View attachment 118347View attachment 118348View attachment 118346

If that is a R6660D relay box in the picture (it looks like one) then the product description says it works with that and you will only need to pair it.

Video on the product page explains how to do this.