Immergas Zeus Superior - Ignition Block

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STZSkW ed 12/07 ZEUS Superior kW
Technical Documentation
Technical Documentation
In the case of dispersion of the circuit detection or anomaly in ame control that generates
an ionisation current (without the gas valve being open) with a duration of at least 20
seconds, boiler functioning is blocked.
To re-start the appliance, press button "C"to "Reset" and successively make a domestic
hot water or heating request.
Parasite ame block
In order to prevent overheating of the water-gas heat exchanger due to blocked pump or
little circulation in the primary circuit, when the heating ow NTC probe (B1) detects
an increase in temperature exceeding 5 °C per second (twice consecutively), the burner is
switched o.
Re-start takes place when the ow temperature falls below 43 °C.
Insucient circulation
If within 10 seconds from the start of the ignition cycle, the detection electrode (E2) does
not detect the presence of a ame on the burner, boiler functioning is blocked.
e P.C.B. makes 2 attempts at ignition with the duration of 10 sec. with an inteval of
30 sec. after which it blocks.
To re-start the appliance, press button"C" to "Reset" and successively make a domestic
hot water or heating request.
N.B.: It is possible to reset the fault up to 5 consecutive times, after which the function
is prevented for at least one hour and on attempt is gained every hour; or 5 attempts are
gained by pressing the Stand-by key or removing the power supply from the circuit.
Ignition block
A central heating ow probe (B1) malfunction is signalled by the relative fault and prevents
functioning in central heating and domestic hot water phase.
Flow probe
(B1)
To prevent over-heating of the water-gas heat exchanger at the end of each heating, anti-
freeze or "chimney sweep" request, the pump (M1) is kept operating for 150 seconds.
Post-circulation pump
After burner switch-o at the end of any request, the combustion chamber is washed
keeping the fan operating for 30 seconds.
Sealed chamber post-
ventilation
In order to avoid overheating the water-gas exchanger, when the boiler temperature read
by NTC ow probe (B1) exceeds 95 °C, the fan starts until the temperature falls below
90 °C.
Flow overheating
ventilation
A DHW probe (B2) malfunction is signalled by the relative fault and prevents functioning
in the domestic hot water phase, but functioning is allowed in heating mode.
DHW probe
(B2)