34
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
3.9 "CHIMNEY SWEEP FUNCTION" (F2).
If this function is activated it takes boiler
functioning to the adjustable power of the central
heating selector switch.
In this state all adjustments are excluded and only
the safety thermostat and the limit thermostat
remain active. To activate the chimney sweep
press the Reset button "C" for a time between 8
and 15 seconds in absence of domestic hot water
and heating requests. Its activation is signalled by
the relative symbol (22 Fig. 2-1). This function
allows the technician to check the combustion
parameters. After the checks deactivate the
function, switching the boiler off and then on
again using the Stand-by button.
3.10 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.
3.11 THREE-WAY ANTI-BLOCK
FUNCTION (Optional).
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.
3.12 RADIATORS ANTI-FREEZE
FUNCTION.
If the system return water temperature is near
to freezing, the boiler starts up until reaching a
safe temperature.
3.13 P.C.B. PERIODICAL SELF-CHECK.
During functioning in 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.
N.B.:
during self-check, the boiler remains off.
3.14 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.
To activate the “F8” function, press buttons “A
and B” at the same time (Fig. 2-1) for 5 seconds
with boiler in stand-by. The function consists
in the cyclic activation of the pump (100 s ON,
20 s OFF) and the 3-way valve (
when the boiler
is connected to an external storage tank
) 120 s
domestic hot water, 120 s central heating). The
function ends after 18 hours or by switching the
boiler on using the ignition button “
”.
3.15 SOLAR PANELS COUPLING
FUNCTION (Optional).
In the case of integration of the heating of the
DHW with solar panel systems, the boiler is
set-up by default foe managing the boiler unit
through parameter “P71” set on “P71.2” (Par. 3.8)
3.16 YEARLY CONTROL AND
MAINTENANCE OF THE
APPLIANCE.
The following checks and maintenance should
be performed at least once a year.
- Clean the flue side of the heat exchanger.
- Clean the main burner.
- If deposits are detected in the combustion
chamber they must be removed and the heat
exchanger coils must be cleaned using nylon
or broomcorn brushes; it is forbidden to use
brushes made of metal or other materials that
may damage the combustion chamber.
- 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 fittings and traces of condensate
residues inside the sealed chamber.
Check the contents of the condensate drain trap.
- Via the condensate drain cap check that
there are no residues of material that clog the
condensate passage; also check that the entire
condensate drain circuit is clear and efficient.
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 seal gaskets and the lid
are intact and perfectly efficient, otherwise
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
deformations or cuts and that it is properly
fixed to the combustion chamber lid; otherwise
it must be replaced.
- Visually check that the water safety drain valve
is not clogged.
- Check that, after discharging the 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 cock) is between 1 and 1.2
bar.
- Visually check that the safety and control
devices have not been tampered with and/or
shorted, in particular:
- temperature safety thermostat;
- Check the condition and integrity of the
electrical 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 the correct calibration of the burner in
the DHW phase (when the boiler is connected
to an external storage tank unit) and central
heating phase.
- Check the operation of the appliance control
and adjustment devices and in particular:
- Intervention of the main electrical switch on
the boiler;
- System regulation probes intervention;
M5 menu
(password must be entered)
1
st
Level
2
nd
Level
Options
Description
Default
value
Value
set
by the
technician
RELE3
(optional)
RELE3-0
Relay 3 not used.
RELE3-0
RELE3-1
Check the storage tank recirculation pump
(when the boiler is connected to an external storage tank)
RELE3-2
The relay signals the intervention of boiler block
( Can be coupled to an external signalling device, not supplied).
RELE3-3
The relay signals that the boiler is on in heating phase.
(Can be coupled with an external pump, not supplied).
RELE3-4
Controls the opening of an external gas valve in concomitance with an
ignition request of the boiler burner.
RELE3-5
Function not available in this boiler model.
RELE3-6
In case the boiler pump needs to be replaced with a traditional pump at
fixed speed it is necessary to connect the new pump to the relay board.
P76
-15°C ÷
+14°C
CE
With S34 = On. If the reading of the external probe is not correct it is possible
to correct it in order to compensate any environmental factors.
With S34 = Off and system supervisor connected, set the parameter to
maximum until the CE value appears.
0°C
