Electrical Circuit - Immergas EOLO Mini Technical Documentation Manual

Technical documentation
E1/E2 - Ignition electrodes
E3 - Detection electrode
F - Fuse
IG - Main switch
JP1 - Gas selector
JP3 - Heating timer selector
LD1 - Flame presence yellow led
The electrical circuit of the EOLO MINI boiler is fully controlled by an electronic modulation board that
controls all the electrical devices on the machine.
Depending on the type of request and the state of the safety devices, the board ignites the burner and
regulates the temperature of the d.h.w and central heating.
Some of the control and safety devices operate at mains voltage and others at low voltage.
Detection electrode
(E3)
Exchanger overheat. safety
(TS2)
(fitted until serial number
2238340)
Fuse
Overheating safety
thermostat
(TS1)
STEME ed 07/03

ELECTRICAL CIRCUIT

LD2 - Fault indicator red led
MOD - Modulation coil
MP - Circulating pump
MV - Fan
NM - Delivery sensor
OP - Programmer clock (timer)
P1 - Room thermostat jumper
230 V AC CIRCUIT
SAFETY DEVICES AND CONTROLS
This detects ignition of the burner by whose flame it is invested.
It is connected to the ignition/detection circuit of the adjustment board.
.
When safety temperature is exceeded (115 ºC) this interrupts power to
the main coils of the gas valve (VG).
It is located at the outlet of the heat exchanger.
This interrupts power to the circuit when power input is over 2 A.
It is fitted on the adjustment board.
.
When safety temperature is exceeded this interrupts power to the
main coils of the gas valve (VG).
Until the serial number 2238340 it was located on the delivery pipe and
was set at 100 ºC.
From serial number 2238341 it is located at the outlet of the heat
exchanger and is set at 105 ºC.
19
Technical documentation
SS - Domestic hot water switch
SV - Flue pressure switch
TA - Room thermostat
TS1 - Overheating safety device
TS2 (*) - Exchanger overheating safety
(fitted until serial number 2238340)
VG - Gas valve
Two-contact
clicson thermostat
Fuse
2 A 250 V
Two -contact
clicson thermostat
EOLO MINI