The same back plate is used for thermostats, programmers, and combination thermostat/programmer. The norm is to look on the back of the item removed there is normally a diagram. Many oil combi boilers are really a boiler with a reservoir inside the boiler for the hot water, as hard to make an oil boiler modulate.
The wire on 1 and 4 with 2 and 3 unused seems odd, so would want to see diagram on back of existing unit.
Internal combi boilerWhich model Grant combi?
Some require a permanent live (we are Grant
G1 registered installers)
Unfortunately neither of those pics are of the data plate
Is your boiler a vortex pro? Approximately how old? there are a number of variants.
We hand normal boiler in our previous property and we brought the Hive with us.Not sure why you've bought a Hive dual channel channel to replace a single channel? I think you need to safely to terminate the common on existing (1) and then transfer the wires over copying the same layout. What you also need to do is decommission the existing thermostat if you have one link the wires or turn it up to maximum and let the hive take over
Can l still utilise the dual receiver we have for Hive?Not the hot water temperature no. Being a combi this is done on that
Utilise which part? Heating will work, I don't think hot water will as it's there for cylinders usuallyCan l still utilise the dual receiver we have for Hive?
just for the heating.Utilise which part? Heating will work, I don't think hot water will as it's there for cylinders usually