Connecting A Wireless Boiler Relay; A Boiler That Requires A Permanent Live; 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
manufacturers 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 has an inbuilt
timer leave this on constant.