Basic Boiler; Boiler That Requires A Permanent Live - Honeywell Evohome Installation Manual

44
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 Relay Box to a:

Basic boiler

Place link here
BDR91
230V
N L
50-60Hz
<5A
L
N

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.