Riello CB 512/2 Manuel D'entretien page 52

4.6.2 Connections with leak detection control
For the electrical wirings to the burner refer to the
instruction manual of said burner.
WARNING
D10107
20020313
XS
2 3 1
X7
L1
N
B5
T 6
T 7
T 8
Installation
Key (Fig. 5)
XS Pressure switch socket
X7 7-pin plug
VS Safety valve
V1 1st stage valve
V2 2nd stage valve
VS
N L
N
T6
T8
9
GB
V1/V2
1 2 3
V1 N V2
Fig. 6