20
INSTALLERUSER
MAINTENANCE TECHNICIAN
3.9 “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 “Reset” button (3) until
activation of the function in the absence of
DHW requests.
Its activation is signalled by simultaneous
ashing of the indicators (11 and 12 Fig. 2-1).
is function allows the technician to check the
combustion parameters.
Once the function is activated, it is possible to
select whether to make the check in CH status
or DHW status by opening any hot water cock
and regulating the power by turning the “CH
regulation” selector (6).
Functioning in CH or DHW mode is visualised
by the relative symbols
or .
After the checks, deactivate the function
switching the boiler o and then on again.
3.10 PUMP ANTIBLOCK 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.
3.11 RADIATORS ANTIFREEZE
FUNCTION.
If the system return water is below 4°C, the boiler
starts up until reaching 42°C.
3.12 P.C.B. PERIODICAL SELFCHECK.
During functioning in heating mode or with
boiler in standby, the function activates every 18
hours aer the last boiler check/power supply. In
case of functioning in domestic hot water mode
the self-check starts within 10 minutes aer the
end of the withdrawing in progress, for duration
of approx. 10 seconds.
N.B.:during self-check, the boiler remains o.
3.13 AUTOMATIC VENT FUNCTION.
In the case of new heating systems and in
particular mode for floor systems, it is very
important that dearation is performed correctly.
e function consists in 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).
e function is activated in two dierent ways:
- at every new power supply of the boiler;
- by pressing buttons at the same time (2 and 4
Fig. 2-1) for 5 seconds with boiler in stand-by.
N.B.: if the boiler is connected to the CAR
V2
,
the “stand-by” function is only obtained via the
remote control panel.
In the rst case, the function has duration of 8
minutes and it can be interrupted by pressing
the “reset” button (4). In the second case it has
duration of 18 hours and it can be interrupted by
simply switching the boiler on.
Activation of the function is signalled by the
countdown shown on the indicator (14).
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