Riello RS 68/EV ULX Installation, Use And Maintenance Instructions page 75

Wiring layout key
A1 flame control for the air/fuel ratio
A2 Operator panel
+BB Burner components
+BC Boiler components
B Filter to protect against radio disturbance
B1 Output regulator RWF
B2 Fuel meter
B3 Modulation signal 4...20 mA
BA Input in current DC 4...20 mA
BA1 Input in current DC 4...20 mA to modify remote set-
point
BP Pressure probe
BP1 Pressure probe
BR Remote setpoint potentiometer
BT1 Thermocouple probe
BT2 Probe Pt100, 2 wires
BT3 Probe Pt100, 3 wires
BT4 Probe Pt100, 3 wires
BTEXT External probe for climatic compensation of the set-
point
BV Input in voltage DC 0...10V
BV1 Input in voltage DC 0...10V to modify remote setpoint
CN1 Ionisation probe connector
G1 Load indicator
G2 Communication interface for Modbus system
G3 Speed revolution sensor
GF Inverter
H Remote lockout signal
ION Ionisation probe
IN Manual burner arrest switch
K1 Clean contacts output relay burner switched on
K2 Clean contacts output relay burner lockout
K3 Relay for inverter lock-out
K4 Relay for inverter control
MV Fan motor
PA Air pressure switch
PE Burner earth
PGM Maximum gas pressure switch
PGMin Minimum gas pressure switch
PGVP Gas pressure switch for valve leak detection control
device
Q1 Three-phase disconnecting switch
Q2 Single phase disconnecting switch
RS Remote burner reset button
S1 On/off selector
SM1 Air servomotor
SM2 Gas servomotor
TA Ignition transformer
TL Limit thermostat/pressure switch
TR Adjustment thermostat/pressure switch
TS Safety thermostat/pressure switch
X1 Burner terminal strip
X2 Auxiliary terminal board
Appendix - Electrical panel layout
XP1
XPD
XPGM
XPGMin Minimum gas pressure switch connector
XPGVP Gas pressure switch connector for valve leak detec-
XRWF
Y
73 GB
Connector for output power regulator kit RWF
Operator panel connector
Maximum gas pressure switch connector
tion control device
Terminal board for output power regulator RWF
Gas adjustment valve + gas safety valve
20205886