Riello 20194153 Installation, Use And Maintenance Instructions page 45

Wiring layout key
A1 Control box
B Filter to protect against radio disturbance
CN1 Ionisation probe connector
FU Fuse
F1 Thermal relay
H Lockout signal lamp
H1 Valve leak detection device lockout signal lamp
h1 1st stage hour counter
h2 2nd stage hour counter
K1 Relay
K2 Relay
KM Motor contactor
IN Burner manual stop switch
ION Ionisation probe
MV Fan motor
PA Air pressure switch
PGmin Minimum gas pressure switch
Q1 Three-phase line switch/disconnecting switch
Q2 Single-phase line disconnecting switch
RS Remote reset button
S1 "On-Off" and "1st - 2nd stage"
SM Servomotor
TA Ignition transformer
TL Limit pressure switch/thermostat
TR Adjustment thermostat/pressure switch
TS Safety pressure switch/thermostat
Y Gas valves
X1 Burner terminal strip
YVPS Valve leak detection device
Appendix - Electrical panel layout
43 GB
20194185