LightwaveRF Comfy LW920 Professional Series Instruction Manual page 26

Install 4: S plan plus (multizone)
4. Wiring to a multi-zone heating system
The basic diagram below shows the main constituent elements of a
multi-zone (S plan plus) system. This system resembles the S plan
system (see previous section), but includes multiple motorised valves
each controlling a heating zone. A separate thermostat controls each
zone valve. Each one needs to be disconnected at the wiring centre
and replaced by a Boiler Switch.
Motorised valve
Zone 1
System boiler
Wiring
Centre
Motorised valve
Zone 2