Terminal Description Connector Terminal Description Connector
1 Burner motor live
4
20 Minimum output thermostat live (T1)
19
2 Earth 21 Heating request signal (option T2)
3 Neutral 22 Flame monitoring signal
11
4 Solenoid valve live
2
23 Earth
5 Neutral 24 Live
6 Earth 25 Air pressure switch signal
10
7 Solenoid valve live 26 Live
8 Live 27 Live
20
9 Live L1
6
28 Remote unlocking signal
10 Earth 29 Neutral
21
11 Neutral 30 Signal fault live
12 Earth 31 Live
8
13 Earth 32 Live
14 Igniter live
5
33 Not used
34
15 Earth 34 Not used
16 Neutral
17 Control thermostat live
T6/7/8
18 Signal T7
19 Signal T8