Technical documentation Technical documentation
STES ed 07/01
EOLO STAR
ELECTRICAL CIRCUIT
E1 - Electrode ignition
E3 - Detection electrode
IG - Main switch
LD1 - Burner operation Led
LD2 - Signal block Led
MOD - Modulation coil
MP - Circulator
MV - Fan
NM - NTC heating probe
NS - NTC hot water probe
OP - Programmer clock
P1 - Room thermostat jumper
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
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.
230 V AC CIRCUIT
SAFETY DEVICES AND CONTROLS
Detection electrode
(E3)
This detects ignition of the burmer by whose flame it is invested.
It is connected to the ignition/detection circuit of the adjustment board.
Fuse
This interrpts power to the circuit when power input is over 2 A.
It is fitted on the modulation board.
Fuse
2 A 250 V
Overheating safety device
(TS)
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.
Double-contact
thermostat clicson
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