Solar Panels Coupling Function; Automatic Slow Ignition Function With Timed Ramp Delivery; Chimney Sweep" Function; Pump Anti-Block Function - Immergas EOLO STAR 24 4E Instructions And Warnings

3.10 SOLAR PANELS COUPLING FUNCTION.

The boiler is prepared to receive pre-heated water from a system
of solar panels up to a maximum temperature of 65°C. In any case,
it is always necessary to install a mixing valve on the hydraulic
circuit upstream of the boiler, on the cold water inlet.
For good functioning of the boiler; the temperature
selected on the solar valve must be 5 °C greater with
respect to the temperature selected on the boiler
control panel.
In this condition, parameter P00 (selection of solar panels) must
be set at "on" and parameter P17 (solar delay) must be set for a
period that is sufficient to receive water from a storage tank located
upstream of the boiler. The greater the distance from the storage
tank, the longer the stand-by time to be set.
3.11 AUTOMATIC SLOW IGNITION FUNCTION WITH
TIMED RAMP DELIVERY.
In the ignition phase the P.C.B. carries out an increasing gas de-
livery ramp (with pressure values that depend on the type of gas
selected) with preset duration. This prevents every calibration or
precision adjustment of the boiler ignition phase in any condi-
tions of use.

3.12 "CHIMNEY SWEEP" FUNCTION.

When activated, this function forces the boiler at max. output
(P06) for 15 minutes.
In this state all adjustments are excluded and only the tempe-
rature safety thermostat and the limit thermostat remain active
(temperature is limited by the parameter "P12"). To activate the
chimney sweep function, press the Reset key for at least 5 seconds.
Its activation is indicated by the flashing symbols (8 and 11 Fig.
30). This function allows the technician to check the combustion
parameters. After the checks disable the function, switching the
boiler off and then on again or simply by pressing the reset button
for about 5 seconds (Pos. 1 Fig. 30).
The heating power can be set to P06 and P05 by pressing buttons
(3 or 4). The power can be changed by one percentage point by
pressing buttons (5 or 6).
If you wish to run the "chimney sweep" function in D.H.W., open
a D.H.W. tap after switching the burner on.
ATTENTION:
ensure a sufficient DHW flow, in order
to avoid high temperatures of the water.
The boiler power can be set to 0% and 100% by pressing buttons
(3 or 4). The power can be changed by one percentage point by
pressing buttons (5 or 6).
The display of the boiler power percentage alternates
with the display of the temperature read by the flow
probe.

3.13 PUMP ANTI-BLOCK FUNCTION.

In the "summer" functioning mode ( ) the boiler has a function
that starts the pump at least once every 24 hours for 30 seconds
in order to reduce the risk of the pump becoming blocked due to
prolonged inactivity.
In the "winter" functioning mode ( ) the boiler has a function that
makes the pump start at least once every 3 hours for 30 seconds.
3.14 DOMESTIC HOT WATER CIRCUIT ANTI-
EXTRUDER FUNCTION.
This function reduces the heating temperature to 57°C if the do-
mestic hot water circulation is detected in the heating mode. The
function can be enabled using parameter (P3).
3.15 P.C.B. PERIODICAL SELF-CHECK.
During functioning in central heating mode or with boiler in
standby, the function activates every 18 hours after the last boiler
check/power supply. In case of functioning in domestic hot water
mode the self-check starts within 10 minutes after the end of the
withdrawing in progress, for duration of approx. 10 seconds.
During self-check, the boiler remains off, including
signalling.

3.16 HEATING TIMER

The boiler has electronic timing, which prevents the burner from
igniting too often in central heating mode. The boiler is supplied
as per standard with a timer adjusted at 3 minutes.
To adjust the timer values, follow instructions for parameter
settings by selecting parameter (P07) and set it with one of the
values indicated on the relative table.

3.17 THREE-WAY ANTI-BLOCK SYSTEM

The boiler is supplied with a function that activates the motorised
three-way unit at least every 24 hours, carrying out a complete
cycle in order to reduce the risk of three-way block due to pro-
longed inactivity.
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