1. Isolate mains supply to boiler.
D. INSTALLATION OF THE SMART INTERFACE
To install the Halo Smart Interface into a new boiler with serial letter code AFQ (found on the data plate)
follow the steps below. For further details on the compatibility of older boilers and how to install the
Smart Interface into a bracket and wire into the boiler please go to
www.idealboilers.com
OFF
4. If an existing Opentherm device has been used,
ensure its removal and add the link wire into the
“opentherm” connection (see diagram) On brand
new boilers the link should already be in place
2. Locate the wiring terminals (230V connections
are on the left and low voltage on the right).
3. If existing 230V device is already installed
remove wiring from the 230V connections
and add the link wire into the room stat/timer
connection (see diagram). On brand new boilers
the link will already be in this position.
Link wire in
room stat/ timer
connection
230V connections
Frost stat
optional
Room stat/
timer
Mains
IN
L N
Low voltage
connections
Opentherm
Weather
compensation
R
230V connections
L
Frost stat
optional
Room stat/
timer
Mains
IN
L N
Low voltage
connections
Opentherm
Weather
compensation
R
