Honeywell Evohome

Connecting a wireless boiler relay
A basic boiler
A boiler that requires a permanent live
For use with boiler that require a permanent live (this
is a typical Combi boiler wiring) but please check
manufacturers instructions. This can be used for boilers
with low voltage or 230vac room thermostat inputs.
230V
50-60Hz
<5A
N L
N L
L
BDR91
Place link here
A-B:5(3)A
A-C:5(3)A
A B C
L
N
230V
50-60Hz
<5A
N L L
BDR91
A-B:5(3)A
A-C:5(3)A
A B C
L
N
N L
Figure 5 Wiring for a basic
boiler (not requiring a
pump overrun). The relay
powers the boiler live input.
Figure 6 Boiler that
requires a permanent live
Boiler room thermostat
terminals (see instructions).
Remove link at boiler if fitted.
If the boiler has an inbuilt
timer leave this on constant.
Wiring diagrams
44 Appendix