T R
V E 1
V E 2
V E 3
F
R
C F
L
N
T C
T m f
T m f 1
S B
N
P S
L 1 L 2 L 3
M
RT
10 4 3 2 1 N 8 5
MS
7
KEY
L Line
N Neutral
L1 Three phase line
L2 Three phase line
L3 Three phase line
M Burner motor
SL Circuit breaker switch
TR Ignition transformer
MS Servo-motor
VE1 Stage 1 solenoid valve
VE2 Stage 2 solenoid valve
VE3 Stage 3 solenoid valve
CF Control unit
FR Photoresistence
RT Circuit breaker relay
Tmf Flame thermostat mod.
Tmf1 Mod. 2nd-3rd flame
SB Block indicator (at a distance)
PS Release button (at a distance)
