Riello PRESS 450 T/N Installation, Use And Maintenance Instructions page 40

WIRING DIAGRAM KEY
A1 Electrical control box
C1 Suppressor
CR Pre-heater contactor
F1 Three-phase fuses
FU1 Pre-heater three-phase fuses
FT Flame sensor
H Remote lockout signalling
H1 Motor lockout signalling
IN Burner manual ON/OFF switch (optional)
st
L1 1 stage signalling
nd
L2 2 stage signalling
rd
L3 3 stage signalling
MB Burner terminal board
MV Fan motor
Q2 Three-phase disconnecting switch
Q3 Three-phase disconnecting switch
RS Reset button
RT1 PT100 probe
S Pre-heater tank
SM Servomotor
S1 Selector
SA Alarm high oil temperature
TL Limit thermostat
TS Safety thermostat
T2 2nd stage thermostat
T3 3rd stage thermostat
TA Ignition transformer
TB Burner earth
TE Electronic thermostat
Tm Minimum thermostat
TM Maximum thermostat
TP Timer
st
V1 1 stage valve
nd
V2 2 stage valve
rd
V3 3 stage valve
VS Safety valve
X1 Burner terminal strip
20170392
Appendix - Electrical panel layout
38 GB