CAUTION
A fused spur or an unswitched socket must be located no
more than 1 metre from the appliance.
Correct earthing in accordance to applicable regulations is
obligatory for the safety and functionality of the boiler.
For installation in damp rooms a fixed connection is
obligatory.
When working on the electrical circuit always isolate the
electric supply.
1. Slide the cover plate (A) (if present) to the front to remove.
2. Open the display cover and unscrew both screws to remove the front cover.
3. Pull the boiler controller unit forwards; the boiler controller will tip
downwards to provide access.
4. Consult sections § 8.3.1 and chapter 13 for making the connections.
5. After making the desired connections plug the appliance into an earthed
wall socket.
8.3.1 Electrical connections
Temperature control Connector X4 Notes
Programmable Room
thermostat
6 – 7 Voltage free room
thermostat.
Outside temperature
sensor
8 – 9 -
Frost protection
thermostat
6 – 7 Parallel to possible
room thermostat
Open Therm (OT) with
timer function
11 – 12
Temperature control Connector X2 Notes
Programmable Room
thermostat 230 V or
Programmable external
control 230 V
1 – 3
Frost thermostat 230 V 1 – 3
To Next Page
