Low Voltage Circuit - Immergas EOLO Mini Manual

Technical Documentation
Ignition electrodes
(E1)
Pump
(M1)
Integrated P.C.B.
3-way valve
(M30)
Gas valve (Y1)
(main coils)
Fan
(M20)

Low voltage circuit.

Zones control unit (CZ)
(external optional)
Comando Amico Remoto
remote control
(CAR) (optional)
Digital remote control
(CRD) (optional)
STEMkW Special ed 01/08
Loads.
Ignition electrodes are controlled by the integrated P.C.B., which triggers electric spark
between the ends of the electrodes; the air-gas mixture ignites as soon as it comes into
contact with the spark.
Powered by the integrated P.C.B. when there is a DHW, central heating or antifreeze
request.
Allows circulation in the primary circuit.
P.C.B. is always powered regardless of the position on the main switch (R10) (see integrated
P.C.B. operation).
Allows flow water within in the primary circuit to be diverted from the central heating
system to the d.h.w. plate exchanger and vice versa.
Powered by the integrated P.C.B.
Powered with main power supply voltage by the integrated P.C.B. when the burner needs
to be ignited.
Allows the flow of gas to the burner.
Guarantees the flow of air to the sealed chamber and the flow of combustion products
to the flue terminal.
Powered by the integrated P.C.B.
Safety and control devices.
It allows the boiler to function with 3 zone valves or external pumps
controlled by the relevant room thermostats.
Zone 1 is controlled (timed operation periods and temperatures) by
the CAR (when installed).
If the boiler is controlled by the CRD, the zone control unit
cannot be installed.
Allows remote control of boiler operation (SUMMER/WINTER
switch, temperature adjustment and display, alarm display, reset, etc.)
and acts as a weekly timer-thermostat.
When CAR is installed, the pre-existing X40 jumper is to be
eliminated.
Allows remote control of the boiler (SUMMER/WINTER switch,
temperature adjustment and display, alarm display, reset, etc.) and acts
as a weekly timer-thermostat.
When CRD is installed, the pre-existing X40 jumper is to be
eliminated.
21
Technical Documentation
See zones control
unit operation
See Comando
Amico Remoto
remote control
operation (CAR)
See Digital
remote control
operation (CRD)
EOLO Mini kW Special