Hive install Query - Combi w/tank

[~Divine~Wind~]

hey all,

Been a while since I looked at these and when we moved I couldn't find the original Thermostat so had to leave my hive behind.

The new setup is:

Combi: Ideal Logic H15
Controller: Therma TQX0027
Stat x2: Therma TQX0073 (one for downstairs and one for bedrooms)
Water Tank: Evocyl 18L EVO HO STD 2Z (immersion OFF! lol)

The controller and stats are woeful compared to the Hive system we had, also have no idea when stuffs on or how the house is keeping temp!

I'm a little confused as to what the correct install should be for this and got great help on here last time

Woudl I be correct in assuming that the install route I need is a Hive for Combi and then an additional stat?
This would be 1 hub connected to the router but 2 receivers connected to the boiler I think?

Annoyingly I've confirmed the new build lot have said that all the controllers and stats are hard wired :/

 

[~Divine~Wind~]

Oh ok, so this isn't how I thought it was lol

I thought he boiler heated up the water then dumped it into the tank
Then the tank had an immersion as well for if the gas goes off.

The power to the tank has been off since we moved in and the hot water has been fine.
The cupboard is a mass of pipes and wires

They've installed a smart meter for the electric, a standard meter for the gas and the wireless doodah they've provided to show us what were using just constantly disconnects.

 

[~Divine~Wind~]

@squerble thanks for the detailed reply mate, much appreciate it

Thanks all as well, guess I'm digging into Hive S Plan