Install advice required for new evohome with OT bridge

[sznichol]

Hi

I have a Vaillant Ecotec Plus 637 (system boiler) in an 'S plan' configuration with 3 zone valves (DWH, CH + single room Underfloor with mixer valve). It is currently controlled by a Vaillant controller with weather compensation, which I really do not like and some external rooms also do not get properly warm as the room the thermostat is located get to temperature way before these rooms do. I have just purchased the following evohome kit from Richard and was hoping for some advice on how this should ideally be setup.

Evohome Opentherm bridge to be installed with a Vaillant Opentherm module.
DWH Kit
Single zone kit for underfloor
Evohome controller kit.
HR92s for all rads bar 3 bathroom heated towel rails.

After a quick chat with Richard, before ordering, the plan was to get my installer to rip out the Vaillant controllers and to install the evohome as per diagram 4 in the install manual. The installer is recommending that I would be better off keeping the 3 zone valves and using the BDR91 to control them. The reason for this was I have 3 towel rads without HR92s. This, from what I have read, seems to be conflicting with how Honeywell suggest when using the OT bridge.

Any advice on how this should ideally be installed would be very grateful.

[Richard]

As per the advise on here, HR92's on all rads without motorised zone valves and a hot water motorised zone valve with the hot water kit.

You have the VR33 eBUS to OpenTherm converter?