Riello 663 T80 Installation, Use And Maintenance Instructions page 52

WIRING DIAGRAM KEY
A1 Control box
B Filter to protect against radio disturbance
B1 RWF Output power regulator
BA Probe with output under current
BA1 Device with output under current to modify remote
setpoint
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
setpoint
BV Probe with output under voltage
BV1 Device with output under voltage for change of
remote setpoint
C Capacitor
F Three-phase line fuses
F1 Fan motor thermal relay
H Remote lockout signal
IN Burner manual stop switch
KM Fan motor contactor
MV Fan motor
Q1 Three-phase disconnecting switch
Q2 Single-phase disconnecting switch
S1 Off / automatic / manual selector
S2 Output increase / decrease selector
SM Servomotor
TA Ignition transformer
TL Limit thermostat/pressure switch
TR Adjustment thermostat/pressure switch
TS Safety thermostat/pressure switch
X1 Terminal board
XPE Control box earth
XTB Burner earth
XTB Shelf earth
UV UV Flame sensor
PO Oil pressure switch
VS Valve in delivery pump (safety)
VM Valve in delivery pump
VU Nozzle valve
XVS Valve connector in delivery pump (safety)
XVM Valve connector in delivery pump
XVU Nozzle valve connector
XRWF RWF terminal board
20167399
Appendix - Electrical panel layout
50 GB