34
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
M5 menu
(password must be entered)
1st Level
2nd Level
Options
Description
Default
value
Value set by
the techni-
cian
RELE3
(optional)
RELE3-0
Relay 3 not used
RELE3-0
RELE3-1
Check the storage tank recirculation pump
RELE3-2
The relay signals the intervention of a boiler block (Can be coupled to an
external signalling device, not supplied)
RELE3-3
The relay signals that the boiler is on and in the heating stage
(Can be coupled with an external circulator 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 the event the boiler circulator pump is replaced with a traditional fixed
speed circulator pump one must connect the new circulator 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 CE value is displayed
0°C
3.9 “CHIMNEY SWEEP FUNCTION”
If this function is activated it takes boiler func-
tioning 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
function press the Reset button “C” for 8 to 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 func-
tion, 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.
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 ANTIFREEZE
FUNCTION.
If the system return water is close to freezing,
the boiler starts up until it reaches a safety
temperature.
3.13 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
water mode the self-check starts within 10 min-
utes 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 function “F8” press buttons “A and
B” at the same time (Fig. 2-1) for 5 seconds with
the boiler in stand-by. The function consists of
the cyclic activation of the pump (100 s ON, 20
s OFF) and the 3-way valve (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.
The boiler is set-up to receive pre-heated water
from a solar panels system up to a maximum
temperature of 65 °C. If used with greater
temperatures, it is recommended to install a
mixing valve on the hydraulic circuit upstream
of the boiler. Set the “P71” function on “P71.1”
(Par. 3.8).
When the boiler inlet water temperature is
equal to or greater than that set by the domestic
hot water selector switch “”, the boiler does not
switch on.
