Instruction manual
7108686.02 (1-11/12) 14
I N S T A L L E R S e c t i o n ( e n )
11.2.8 AGU 2.550
Use the AGU 2.550 , already installed in the boiler, to send information from the boiler
as described below to a BMS panel.
ELECTRICAL CONNECTION
X1 (L-N)
Power supply (230V 50Hz AC) connected to the boiler terminal
block M1 (C+M)
X1 (QX21) Not used
X1 (QX22-N) Boiler OPERATION (light on = run)
X1 (QX23-N) Boiler ALARM (light on = lockout)
X2 (H2-M) INPUT Electrical Signal 0÷10 V
12. SPECIAL FUNCTIONS
12.1 SYSTEM AIR EXTRACTION FUNCTION
This function is used to facilitate the elimination of the air inside the heating circuit when the boiler is rst installed or after mainte-
nance when the water is drained from the primary circuit and re-lled.
To enable the system air extraction function press buttons
together for 6 seconds. When the function is active, On appears on the display for a few seconds, followed by programme
row 312.
The electronic board will activate a pump on/off cycle lasting 10 minutes. The function will automatically stop at the end of the
cycle. To manually exit this function, press the above buttons together for 6 seconds once again.
12.2 COMMISSIONING FUNCTION
To commissioning the gas valve, proceed as follows:
• Press buttons and together for at least 6 seconds. When the function is enabled, the displays shows “On” for a few
seconds followed by programme row “304” alternated with the % of boiler power.
• Press to gradually adjust power (sensitivity 1%) 100% for high re and 0% for low re.
• To exit press both buttons together for at least 6 seconds, as described in point one.
Press to display the instantaneous ow temperature for 15 seconds.
12.3 CHIMNEY SWEEP MODE
When this function is enabled, the boiler generates maximum heating power. To enable the function, proceed as follows:
• press together for 6 seconds. The display shows “303” alternated with the power output of the boiler.
• Press and to adjust boiler power 1=minimum, 2=maximum DHW, 3=maximum heating.
• To exit press both buttons together for at least 6 seconds, as described in point one.
13. FAULTS THAT CANNOT BE RESET BY THE USER
In case of FAULTS that cannot be reset by pressing (such as E151 or exceeding 5 manual
RESET attempts by the user) RESET the board by pressing the black button ( R) located under
the rubber cap (symbol ) of the front control panel (gure to side).
14. PARAMETER SETTINGS
To programme the parameters of the boiler electronic board, proceed as follows:
• Press together and hold them down for 6 seconds until programme row “P02” appe-
ars on the display alternated with the set value (°C);
• Press and hold down for 6 seconds until “On” appears on the display. Release the but-
ton and “P01” appears on the display;
• Press to scroll the list of parameters;
• Press , the value of the selected parameter begins ashing, press to change the value;
• Press to conrm the value or press to exit without saving.
Further information concerning the parameters listed in the following table are supplied together with the required acces-
sories.
0÷10 V
Input Signal
CG_2241
~
230 V
(Boiler M1)
3
ALARM (LOCKOUT)
SIGNAL LAMP 230V
STATUS (RUN)
SIGNAL LAMP 230V