WIRING DIAGRAM
The wiring scheme to be carried out by technician are:
— Power Supply Line
— Thermostats Line
— Eventual blocking lamp and/or hour-meter
WARNING:
- Do not invert the neutral with the phase.
- Make the connection to an effi cient earthing system.
- Bridge 3-8 on base is found only on versions withouth preheater.
ECO 3 - 3R - 3 ST 3 3 R ST - 5 N - 5 R N - 5 R N ST - 7 R
Key
CO
Hour-meter (possible)
F
Fuse
FA
Anti-interference filter
FR
Photoresistance
IG
Main switch
LS
Lock-out warning light (possible)
MA
Control unit terminal board
MB
Burner motor
PB
Burner connector
PR
Preheater (only mod.R)
SC
Plug
TA-TC Boiler environment thermostat
TR
Ignition transformer
TS
Safety thermostat
Tm
Minimum thermostat
VE
Solenoid valve
1
2
2 2 3 4 5 6 7 8
MA
FA
M
MB
VE
CO
N
101112
9
Tm
PR
TR
PB
B4
S3
T2 T1 N
L1
SC
TS
H
Z
TC-TA
F
LS
IG
N
L
N
FR
UK
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