Heating / hot water / underfloor heating issue

[Rudie]

Hi all

Moved into a 4 bed property where we have a 35kw system boiler that has a hot water tank which is controlled by a hive controller.
Also have a manifold which serves 2 zones one for kitchen and one for utility.

The schedules are all separate , no overlaps.
Thing is when we use the heating along side the hot water schedule, the radiators don’t warm up as much as they would when they running by themselves.

Same with underfloor heating.

Is this the case with all systems like this? Or is something not quite right?

Thanks in advance.

 

[Rudie]

Forgot to say the underfloor heating is controlled by a heatmeiser controller.

 

[CountryFan]

35Kw seems massively oversized! Wonder if it’s been range rated? What motorised valves are in play?

 

[Rudie]

Hi yes Looks like I got 3 Honeywell home motorised valves.