Solar Panels Coupling Function; Chimney Sweep" Function; Pump Anti-Block Function; Three-Way Anti-Block Function - Immergas VICTRIX 24 TT 1E Instruction And Warning Book

3.12 SOLAR PANELS COUPLING
FUNCTION.
The boiler is set-up to receive pre-heated water
from a system of solar panels up to a maximum
temperature of 65°C. In all cases, it is always
necessary to install a mixing vale on the hy-
draulic circuit upstream from the boiler on the
cold water inlet.
Note: in order for the boiler to work properly, the
temperature selected on the solar valve must be
5°C greater than the temperature selected on the
boiler control panel.
In this condition, parameter t2 (DHW ther-
mostat) must be set at "1" and parameter t3
(solar delay time) 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. Once these adjustments
have been made, when the temperature of the
boiler inlet water is the same or greater than that
set by the DHW selector switch, the boiler does
not switch on.

3.13 "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 "Reset" button (2)
until activation 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 (11
and 12 Fig. 2-1), while on the CAR
it is indicated as "ERR>07".
This 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
and regulating the power by turning the "CH
regulation" selector (6).
The central heating or DHW operating mode is
displayed by the relative symbols
After the checks, deactivate the function switch-
ing the boiler off and then on again.
Attention: the boiler needs a certain amount of
time to stabilise itself before carrying out a com-
bustion parameters check. It is thus necessary to
wait for the boiler to carry out a self-diagnosis
test, which is signalled by the (
symbol. Once the symbol stops flashing, it is
possible to check the combustion parameters.

3.14 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.
3.15 THREE-WAY ANTI-BLOCK
FUNCTION.
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.
3.16 RADIATORS ANTIFREEZE
FUNCTION.
If the system return water is below 4°C, the boiler
starts up until reaching 42°C.
3.17 P.C.B. PERIODIC 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 wa-
ter mode the self-check starts within 10 minutes
after the end of the withdrawing in progress, for
duration of approx. 10 seconds.
N.B.: during self-check, the boiler remains off.

3.18 AUTOMATIC VENT FUNCTION.

In the case of new central heating systems and
in particular mode for floor systems, it is very
important that dearation is performed correctly.
The function consists of the cyclic activation of
the pump (100 s ON, 20 s OFF) and the 3-way
valve (120 s D.H.W., 120 s C.H.).
The function is activated in two different ways:
- every time the boiler is powered;
- by pressing the buttons at the same time (3
and 5 Fig. 2-1) for 5 seconds with the boiler in
stand-by.
N.B.: if the boiler is connected to the CAR
the "stand-by" function can only be activated
via the remote control panel.
In the first case, the function has duration of 8
minutes and it can be interrupted by pressing
the "reset" button (2). In the second case it has
duration of 18 hours and it can be interrupted by
simply switching the boiler on.
(optional)
V2
Activation of the function is signalled by the
countdown shown on the indicator (14).
3.19 YEARLY APPLIANCE CHECK AND
MAINTENANCE.
The following checks and maintenance should
be performed at least once a year.
- Check that the system's water PH is between
6.5 and 8.5.
- Visually check for water leaks or oxidation
from/on fittings and traces of condensate
or .
residues inside the sealed chamber.
- Check contents of the condensate drain trap.
- Check that there are no residues of material
clogging the condensate passage; also check
that the entire condensate drainage circuit is
clear and efficient.
- Visually check that the water safety drain valve
) flashing
is not clogged.
- Check that, after discharging system pressure
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 after refilling the system by
means of the filling valve) is between 1 and 1.2
bar.
- Visually check that the safety and control
devices have not been tampered with and/or
short-circuited.
- Check the condition and integrity of the elec-
trical system and in particular:
- supply voltage cables must be inside the
fairleads;
- there must be no traces of blackening or
burning.
- Check ignition and operation.
- Check correct calibration of the burner in
domestic hot water and central heating phases.
- Check the operation of the appliance control
and adjustment devices and in particular:
- system regulation probes intervention;
- domestic hot water control thermostat inter-
vention.
- Check sealing efficiency of the gas circuit and
the internal system.
- Verify the intervention of the ionisation flame
control no gas device:
- Check the CO
function at the three reference heat outputs.
Should values out of the indicated tolerance
range be detected, check the integrity of the
ignition / detection electrode and, if required,
change it, also changing the relative gasket. At
this point, activate the "complete calibration"
function.
Attention: the burner does not need to be
opened for normal maintenance of the appliance.
However, should it be removed, you must change
the gasket.
N.B.: in addition to yearly maintenance, you
must also check the thermal system and energy
V2
efficiency, with the frequency and procedures
that comply with the technical regulations in
force.
34
by using the chimney sweep
2