ENGLISH
14
5.1 Routine maintenance
This normally means the following tasks:
- removing any oxidation from the burner;
- removing any scale from the heat exchangers fume side;
- checking and cleaning the drainage pipes;
- checking the external appearance of the boiler;
- checking the ignition, switch-off and operation of the appliance, in
both domestic water mode and heating mode;
- checking the seal on the gas and water couplings and pipes;
- checking the gas consumption at maximum and minimum output;
- checking the position of the ignition-flame detection glowplug;
- check the “no gas” safety system;
- cleaning the filter inside the heating return line tap. Follow the in-
structions below:
- set the lever to “filter cleaning“
- unscrew plug
A
- remove the filter
B
and clean it
- remove any dirt in the filter chamber
- put back the filter
- put back the plug
A
- set the lever to the opening position
opening
position
closing
position
filter cleaning
position
A
B
-
Do not clean
the appliance or its parts with easily inflammable
substances (e.g. benzine, alcohol, etc.).
- Do not clean panels, painted parts and plastic parts with paint
thinner.
Panel cleaning must be carried out only with soapy water.
b
After routine and extraordinary maintenance operations have
been carried out, fill the siphon, following the instructions in the
sec
tion “Preliminary cheks”.
5.2
Extraordinary maintenance
These tasks restore appliance operation in accordance with the
design and regulations - e.g. following the repair of an accidental
fault.
This normally means:
-
replacement
-
repair
- overhaul of components.
These tasks require special means, equipment and tools.
b
During the initial installation phase, or in the event of
extraordinary maintenance, you are advised to activate the
procedure to d
ischarge air from the heating circuit and boiler (see
section 3.4).
5.3
Checking the combustion parameters
- Position the function selector on to switch off the boiler (fig.
44).
- Turn the DHW temperature selector on (fig. 44).
Wait until the ignition of the burner (about 6 seconds). The display
shows “ACO”, the boiler operates at full power heating.
- Remove the screw
C
and the cover
E
on the air box (fig. 45).
- Insert the probes of the analyzer in the positions provided on the
air box.
b
The flue gas analysis probe must be fully inserted as far as
possible.
- Check that the CO
2
values match those given in the table, if the
value shown is different, change it as indicated in the chapter
entitled “Gas valve calibration”.
METHANE
GAS (G20)
LIQUID GAS
(G31)
MAXIMUM CO
2
9,0
10,0
%
MINIMUM CO
2
9,0
10,0
%
- Check the flue combustion.
The “combustion analysis” function remains active for a limited time
of 15 minutes; if a delivery temperature of 90°C is reached the burner
will extinguish. It will reignite when this temperature drops below
78°C.
If you want to interrupt the procedure turn the domestic hot water
temperature selector so that it is within the “+” and “-” symbols.
Subsequently:
- remove the analyser probe and close the combustion analysis inlet
- close the instrument panel and refit the shell
When checks are completed:
- Position the knobs depending on the type of operation desired.
6 - CIRCULATOR SETTINGS
Circulator residual discharge head
The boilers is equipped with an already hydraulically and electrically
connected circulator, whose useful available performance is indicat-
ed in the graph.
The circulator comes set from the factory with a 6 metre discharge
head curve.
The boiler is equipped with an anti-blocking system which starts up
an operation cycle after every 24 hours in standby with the mode
selector in any position.
b
The "antiblocking" function is active only if the boiler is electrically
powered.
a
Operati
ng the circulator without water is strictly forbidden.
If you need to use a different curve you can select the desired level
on the circulator.
Below the main characteristics and the ways to set up their desired
operation are listed.
User interface
The user interface is made up of a button (
A
), a two-coloured red /
green LED (
B
) and four yellow LEDs (
C
) arranged in a row.
The user interface allows the operating performance to be viewed
(operating status and alarm status) and it also allows the circulator
operating modes to be set.
The performance, indicated by the LEDs (
B
) and (
C
) is always visible
during normal operation of the circulator whereas the settings can be
carried out by pressing the button (
A
).
Operating status indication
When the circulator is in operation the LED (
B
) is green. The four
yellow LEDs (
C
) indicate the electrical energy consumption (P1) as
shown in the following table
LED status
CIRCULATOR status
Consumption in
% of MAX P1 (*)
Green LED on +
1 yellow LED on
Operating at minimum
0~25
Green LED on +
2 yellow LEDs on
Operating at
minimum-medium
25~50
Green LED on +
3 yellow LEDs on
Operating at medium-
maximum
50~75
Green LED on +
4 yellow LEDs on
Operating at maximum
100
(*) For the power (P1) absorbed by the circulator see the indications
in the “Technical Data” table.
Alarm status indication
If the circulator has detected one or more alarms the two-coloured
LED (
B
) will be red. The four yellow LEDs (
C
) indicate the type of
alarm as shown in the following table.
