The Wiser system currently supports OpenTherm only in conjunction with a combi boiler and a 1 channel Wiser HubR.
If your boiler supports OpenTherm, follow the instructions below.
Existing OpenTherm Installation
1 Remove the OpenTherm cables from the existing controller or thermostat.
2 Remove the Communication module from the rear of the HubR
3 Set the OpenTherm cables into the Communication module. Cables can be wired any way.
4 Replace the Communication module into the HubR
5 Mount the HubR on the backplate. When OpenTherm connection is detected, Wiser Heat app will automatically set-up Communication modulation as control type without asking for any configuration.
Re-wiring to OpenTherm from standard installation
Any motorised valves must be disconnected and set to open. Then follow steps 2 – 5 above to wire in the Communication module.
If you are fitting a new system or require rewiring, contact an installer.