Maintenance Function (Ma); Chimney Sweep" Function; Solar Panels Coupling Function; Pump Anti-Block Function - Immergas Victrix Tera 28 1 Instructions And Warnings

3.16 MAINTENANCE FUNCTION (MA).

Using this function you can activate some operating devices of the
boiler without starting it, thus verifying the functionality.
The function is active for 15 minutes and it can be stopped by
pressing the button "
To activate the "Maintenance" function access the special functions
as described in Paragraph 3.12 and select the "MA" function.
The following loads can be activated within this function:
- Fan (Fn): the fan is brought to ignition speed. Using the buttons
" " you can increase or decrease the fan speed.
- Circulator (Pu): the circulator is brought to maximum speed,
the relative speed is shown on the display, using the buttons
" " you can increase or decrease the circulator speed.
- Three-way (3d): the symbol is shown on the display according
to the position of the valve, DHW (
( ), using the buttons "
position, taking care to wait for the completion of passage be-
tween statuses.
- Configurable relay (rl): the configurable relay in the boiler is
energised.

3.17 "CHIMNEY SWEEP" FUNCTION.

When activated, this function forces the boiler to variable output
for 15 minutes.
In this state all adjustments are excluded and only the safety
thermostat and the limit thermostat remain active. To activate the
chimney sweep function, press the "
of the function in the absence of DHW requests.
Its activation on the boiler display is confirmed by the indicators
flashing at the same time (17 and 18 Fig. 37).
Using the buttons " " you can select between three predefined
power levels:
-"0%"
- Max CH output (P2)
- Max DHW output (P0).
While by using the buttons "
0% to max DHW output (P0), with intervals of 1%.
The central heating or DHW operating mode is displayed by the
relative symbols or
After the checks, deactivate the function by switching the boiler
off and then back on again.
".
) or central heating
" you can change the valve
" button until activation
This function allows the
technician to check the
combustion parameters.
Once the function is ac-
tivated, it is possible to
select whether to make
the chick in CH status or
DHW status by opening
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any hot water cock.
" you can select the power from
.

3.18 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.
To optimise the operation,where the probe is not already fitted
on the boiler, the solar inlet probe kit is available on request (see
wiring diagram Fig. 39):
- if there is no probe kit, it is advisable to set parameter A6 (DHW
thermostat) at "1";
- otherwise, where the kit is installed or the probe is already present
in the boiler, parameter A6 must be left at "0". This kit allows
connecting a probe on the domestic cold water inlet pipe of the
boiler to prevent unnecessary ignitions in systems with water
heating through solar systems or alternative sources. The boiler
will not turn on if the inlet water is sufficiently hot.
In both conditions (probe present or not), we recommend setting
parameter t3 (solar delay timing) at a time sufficient to let the water
inside the D.H.W. circuit upstream of the boiler drain.
The greater the distance from the storage tank, the longer wait
time will have to be set.
With these adjustments made, when a domestic withdrawal is
requested, once the time set on parameter "t3" has passed, if the
water entering the boiler is at a temperature that is equal to or
greater than that set, the boiler will not turn on.
Note: in order for the boiler to work properly, the temperature
selected on the mixing valve must be 5°C higher than the tem-
perature selected on the boiler control panel.

3.19 PUMP ANTI-BLOCK FUNCTION.

The boiler has a function that starts the pump at least once every
24 hours for the duration of 30 seconds in order to reduce the
risk of the pump becoming blocked due to prolonged inactivity.

3.20 3-WAY ANTI-BLOCK SYSTEM.

Both in "domestic hot water" and in "domestic hot water-central
heating" phase the boiler is equipped with a function that starts the
three-way motorised group 24 hours after it was last in operation,
running it for a full cycle so as to reduce the risk of the three-way
group becoming blocked due to prolonged inactivity.

3.21 RADIATORS ANTIFREEZE FUNCTION.

If the system return water is below 4°C, the boiler starts up until
reaching 42°C.
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