Honeywell evohome Figure 4 Wiring Diagram

[Richard]

We are often asked about this, so please find below a basic wiring diagram for figure 4 installations listed on page 43 of the evohome Installation Guide.

The Grey and Orange wires on the DHW motorised zone valve are not required hence they have been removed from the diagram.

The 'Boiler Control Relay' can be located at the boiler position rather than at the junction box if necessary.

Some boilers will have a integral pump, so may have a 'switched live' terminal instead of the BDR91 controlling the 'live' for the boiler. The diagram is really representing an older style boiler or an Oil Fired appliance and not a modern gas boiler.

Many thanks,

Richard