21
IN
ST
ALLER
U
SER
MAINTE
NA
NCE TECHN
IC
IAN
Relay 1 functioning.
See relay board instruction
sheet (Optional).
Relay 1 functioning
(exchange, clean contacts)
Flashing
LED (slow)
LED 2
Main zone control
(Standard setting)
LED 3
General alarm
LED 6
CH phase active
LED 7
External gas valve power supply
LED 8
Relay 2 functioning.
See relay board instruction
sheet (Optional).
Relay 2 functioning (simple,
contacts powered with SELV
contact in series)
Flashing
LED (slow)
LED 2
LED 4
General alarm
LED 6
CH phase active
LED 7
External gas valve power supply
LED 8
Secondary zone control (from
S20 on relay board contact
LED 9
Relay 3 functioning.
See relay board instruction
sheet (Optional).
Relay 3 functioning
(exchange, powered contacts)
Flashing
LED (slow)
LED 2
Aqua Celeris system power
supply (cannot be used)
LED 5
General alarm
LED 6
CH phase active
LED 7
External gas valve power supply
LED 8
3.8 AUTOMATIC SLOW IGNITION
FUNCTION WITH TIMED RAMP
DELIVERY.
In the ignition phase the P.C.B. carries out an
increasing gas delivery ramp (with pressure
values that depend on the type of gas selected)
with preset duration. is prevents every
calibration or precision adjustment of the boiler
ignition phase in any conditions of use.
3.9 "CHIMNEY SWEEP FUNCTION".
When activated, this function forces the boiler
at max. 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 it is necessary to position the main
switch on Reset for a time between 8 and 15
seconds without DHW or CH requests. Its
activation is signalled by the simultaneous
allows the technician to check the combustion
parameters. A er the checks, deactivate the
again.
3.10
During the "DHW" phase (
) the boiler
has a function that starts the pump at least once
every 24 hours for the duration of 2.5 minutes in
order to reduce the risk of the pump becoming
blocked due to prolonged inactivity.
In DHW-CH functioning mode (
) the
boiler has a function that makes the pump start
at least once every 3 hours for 2.5 minutes.
3.11
Both in “domestic hot water” and in “domestic
hot water-central heating” phase the boiler is
equipped with a function that starts the three-
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
FUNCTION.
If the system return water is below 4°C, the boiler
starts up until reaching 42°C.
3.13
During functioning in heating mode or with
boiler in standby, the function activates every 18
case of functioning in domestic hot water mode
end of the withdrawing in progress, for duration
of approx. 10 seconds.
N.B.:
including signalling.
3.14 YEARLY CONTROL AND
MAINTENANCE OF THE
APPLIANCE.
be performed at least once a year.
-
- Clean the main burner.
- Check correct ignition and functioning.
- Ensure correct calibration of the burner in
domestic water and heating phases.
- Check correct functioning of appliance control
and adjustment devices and in particular:
- intervention of main electrical switch on
boiler;
- system control thermostat intervention;
- domestic hot water control thermostat
intervention.
-
internal system.
- Check intervention of the device against no gas
- check that the relative intervention time is
less than 10 seconds.
- Visually check for water leaks or oxidation
from/on connections and traces of condensate
residues inside the sealed chamber.
- Check, by means of the condensate drain cap,
that there are no residues of material blocking
- Check contents of the condensate drain trap.
- Visually check that the water safety drain valve
is not blocked.
-
and bringing it to zero (read on boiler
manometer), the expansion vessel charge is at
1.0 bar.
- Check that the system static pressure (with
bar.
- Check visually 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:
- electrical power cables must be inside the
fairleads;
- there must be no traces of blackening or
burning.
N.B.:
on occasion of periodical maintenance of
the appliance it is appropriate also to check and
perform maintenance on the heating system, in
compliance with that indicated by the regulations
in force.