Electrical Circuit - Immergas EOLO Star Export Manual

Technical documentation
E1 - Electrode ignition
E3 - Detection electrode
IG - Main switch
LD1 - Burner operation Led
LD2 - Signal block Led
MOD - Modulation coil
The electrical circuit of the EOLO STAR boiler is fully controlled by an electronic modulation board.
Some of the control and safety devices operate at mains voltage and others at low voltage.
Detection electrode
(E3)
Fuse
Overheating safety device
(TS)
STES ed 07/01

ELECTRICAL CIRCUIT

MP - Circulator
MV - Fan
NM - NTC heating probe
NS - NTC hot water probe
OP - Programmer clock
P1 - Room thermostat jumper
230 V AC CIRCUIT
SAFETY DEVICES AND CONTROLS
This detects ignition of the burmer by whose flame it is invested.
It is connected to the ignition/detection circuit of the adjustment board.
This interrpts power to the circuit when power input is over 2 A.
It is fitted on the modulation board.
When the safety threshold is exceeded (105 ºC) this interrupts power to
the main coils of the gas valve (VG).
It is located at the exchanger outlet.
14
Technical documentation
SP - System water pressure switch
SS - Hot water flow micro-switch
SV - Flue pressure switch
TA - Room thermostat
TS - Overheat. safety thermostat
VG - Gas valve
2 A 250 V
Double-contact
thermostat clicson
Fuse
EOLO STAR