Riello 3438964 Installation, Use And Maintenance Instructions page 40

3.2 ELECTRICAL SYSTEM
PRE-HEATER CONNECTION
PROBE TO ELECTRONIC
THERMOSTAT
CMV Fan motor contact maker
CR Resistor contact maker
CO Commutator
FR Flame sensor
L1 Lamps for 1
L2 Lamps for 2
L3 Lamps for 3
MB Burner terminal strip
MV Fan motor
RMO Control box
RT Overload
S Pre-heater tank
2915844
DIRECT START-UP
(carried out by the factory)
st
stage
nd
stage
rd
stage
COMMUTATOR
D2737
SM Air-damper actuator
SO Probe PT100
TA Ignition transformer
TB Burner earth
TE Electronic thermostat
Tm Minimal thermostat
TM Maximal thermostat
TP Timer
V1 Oil valves for 1
V2 Oil valves for 2
V3 Oil valves for 3
VS Safety valve
6
GB
D2738
st
stage
nd
stage
rd
stage
D2618