Chimney Sweep Function; Pump Anti-Block Function; Ree-Way Anti-Block System; Radiators Antifreeze Function - Immergas VICTRIX TERA 24 PLUS Instruction Booklet And Warning

3.14 "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 ther-
mostat remain active. To activate the chimney
sweep function, press the "
until activation of the function in the absence
of DHW requests.
Its activation on the boiler display is con rmed
by the indicators ashing at the same time (17
and 18 Fig. 35).
is function allows the technician to check the
combustion parameters.
Once the function is activated, it is possible to
select whether to make the chick in CH status
or DHW status by opening any hot water cock.
Using the buttons " " you can select be-
tween three prede ned power levels:
- "0%"
- Max CH output (P2)
- Max DHW output (P0).
While by using the buttons "
select the power from 0% to max DHW output
(P0), with intervals of 1%.
e central heating or DHW operating mode is
displayed by the relative symbols
A er the checks, deactivate the function switch-
ing the boiler o and then on again.
3.15 PUMP ANTI BLOCK FUNCTION.
e 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.
3.16 THREE 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 a er 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.
3.17 RADIATORS ANTIFREEZE
FUNCTION.
If the system return water is below 4°C, the boiler
starts up until reaching 42°C.
3.18 YEARLY APPLIANCE CHECK AND
MAINTENANCE.
e following checks and maintenance should
be performed at least once a year.
- Clean the ue side of the heat exchanger.
- Clean the main burner.
" button
- Check the correct positioning, integrity and
cleanliness of the detection and ignition elec-
trode; remove any oxide present.
- If deposits are detected in the combustion
chamber one must remove them and clean
the exchanger coils using nylon or sorghum
brushes; it is forbidden to use brushes made
of metal or other materials that may damage
the combustion chamber itself.
- Check the integrity of the insulating panels
inside the combustion chamber and if damaged
replace them.
- Visually check for water leaks or oxidation
from/on connections and traces of condensate
residues inside the sealed chamber.
50
- Check the contents of the condensate drain
trap.
- Check that there are no material residues in
the condensate drain siphon clogging the
condensate passage; also check that the entire
condensate drainage circuit is clear and e -
cient.
In the event of obstructions (dirt, sediment,
etc.) with consequent leakage of condensate
in the combustion chamber, one must replace
the insulating panels.
- Check that the burner and gas manifold seal
" you can
gaskets are intact and perfectly e cient, other-
wise replace them. In any case the gaskets must
be replaced at least every two years, regardless
of their state of wear.
- Check that the burner is intact, that it has no
or .
deformations or cuts and that it is properly
xed to the combustion chamber lid; otherwise
it must be replaced.
- Visually check that the water safety drain valve
is not blocked.
- Check that, a er discharging the system pres-
sure and bringing it to zero (read on boiler
pressure gauge), the expansion vessel pressure
is at 1.0 bar.
- Check that the system static pressure (with
system cold and a er re lling the system by
means of the lling valve) is between 1 and 1.2
bar.
- Check visually that the safety and control
devices have not been tampered with and/or
shorted, in particular:
- check the integrity of the storage tank's Mag-
nesium Anode (when the boiler is connected to
an external storage tank unit).
- Check the condition and integrity of the elec-
trical system and in particular:
- electrical power cables must be inside the
fairleads;
- there must be no traces of blackening or
burning.
- Check correct lighting and operation.
- Ensure correct calibration of the burner in
domestic water (when the boiler is connected
to an external storage tank unit) and heating
phases.
- Check correct operation of control and adjust-
ment devices and in particular:
- system regulation probes intervention;
- domestic hot water control thermostat inter-
- Check sealing e ciency of gas circuit and the
internal system.
- Check the intervention of the device against no
gas ionisation ame control. Intervention time
must be less than 10 seconds.
N.B.: in addition to yearly maintenance, one
must also check the thermal system, with fre-
quency and procedures that comply with the
indications of the technical regulations in force.
37
vention (when the boiler is connected to an
external storage tank unit).