Immergas HERCULES Condensing 26 2 E Manual page 41

Technical Documentation
Room thermostat (S20)
(external optional)
Safety thermostat
(E4)
Flue safety thermostat
(E6)
Display board
(A4)
IMG BUS outlet
Gas valve (Y1)
(main coils)
Fan
(M20)
STHCkW ed 04/09
Enables functioning in CH mode when the room temperature is
below that requested.
If the CAR or Super CAR is installed, the room thermostat must
be disconnected without restoring the pre-existing jumper X40.
When the safety temperature is exceeded (100 °C) remove the
power supply to the main coils of the gas valve.
It is positioned on the flow pipe at the outlet of the primary heat
exchanger.
When the flue safety temperature is exceeded (110 °C) remove the
power supply to the main coils of the gas valve.
It is positioned on the condensation module.
Loads.
Buttons and selector switches can be used to RESET the boiler, set, modify and memorise
boiler functioning values.
By means of the display and according to the buttons selected it is possible to display the
functioning values and error codes that have intervened on the boiler.
It allows the connection of electronic devices, e.g. Immergas zones digital control unit.
It is powered (24 V DC) by the integrated P.C.B. when burner ignition is necessary.
Allows the passage of gas to the burner.
Guarantees the flow of air in the sealed chamber and the escape of combustion prod-
ucts.
It is powered by the integrated P.C.B.
39
Technical Documentation
Contact in
Shut-off
Klixon thermostat
with normally
closed contact
Klixon thermostat
with normally
closed contact
HERCULES Condensing Export