Wiring Diagrams - Honeywell Evohome Installation Manual

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Wiring diagrams

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
Appendix
Connecting a wireless boiler relay
A basic boiler
Place link here
BDR91
230V
N L
50-60Hz
<5A
L
N
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
manufactures instructions. This can be used for boilers
with low voltage or 230vac room thermostat inputs.
BDR91
230V
N L L
50-60Hz
<5A
L
N
N L
A-B:5(3)A
A-C:5(3)A
L A B C
N L
A-B:5(3)A
A-C:5(3)A
A B C
Boiler room thermostat
terminals (see instructions)
Remove link at boiler if fitted
If the boiler had a inbuilt timer
leave this on constant.