104
Minimum load adjustment.
•
Press [▼] button until minimum load is reached.
Display message
H E A T I
N G : S e r v i
c e
3 0 %
> > >
1 2 3 .
4 ° C ( 1 2 3 .
4 ° C )
Boiler is activated and operates at service mode at minimum.
•
By setting screw [3], adjust the gas valve to obtain the CO
2
value of table 1or figures 1 or 2.
Decrease CO
2
percentage
Turn key [3] left (counter clockwise)
Increase CO
2
percentage
Turn key [3] right (clockwise)
Repeat adjustments:
•
Check again at maximum load and adjust if necessary.
•
Check again at minimum load and adjust if necessary.
•
Repeat previous steps until measurements match table 1 or figures 1 or 2.
•
Switch the top burner off (press service button).
14.2.2 C
HECKING AND ADJUSTING THE BOTTOM BURNER
•
On the right control panel, go to service mode (press [SERVICE] button for 4 seconds). Make sure that only
the bottom burner is on: the green LED on the left panel (top burner) should be off. Also check that the fan
of the top burner is not running: the error message "NRV or fan fault" should not be on the display of the left
panel.
•
Set the load at maximum
by pressing the [▲] button.
•
Measure CO
2
in the lower measuring hole (bottom burner).
•
Adjust the CO
2
within the values according to table 1 or figures 1 or 2 using key [2].
•
Set the load at minimum
by pressing the [▼] button.
•
Adjust the CO
2
within the values according to table 1 or figures 1 or 2 using key [3].
•
Check again at maximum load and adjust if necessary.
•
Check again at minimum load and adjust if necessary.
•
Repeat previous steps until measurements match table 1 or figures 1 or 2.
•
Switch the bottom burner off (press [SERVICE] button).
14.2.3
C
HECKING BOTH BURNERS
To s
witch both burners on at the same time: switch to service mode, set one burner at 50% load using the [▲] and/or
[▼] buttons. While this burner is on, switch the other burner to service mode (press [SERVICE] button for 4 seconds).
After start-up, set it also at 50% load.
•
To set both burners at maximum load, press [▲] buttons on both panels simultaneously.
•
Measure CO
2
in the upper measuring hole (top burner); a value within the margin of the table1 or figures 1
or 2 is acceptable. Note down this value.
•
Measure CO
2
in the lower measuring hole (bottom burner); a value within the margin of the table1 or figures
1 or 2 is acceptable. Note down this value.
•
Calculate the average of these two measurements: add the upper and lower values and divide by two.
•
If this average CO
2
at maximum matches table 1 or figure 1 or 2 proceed with the next step: checking at
minimum load. If the deviation is larger than check and re-adjust burners separately again.
•
To change to minimum load, press [▼] buttons on both panels simultaneously.
•
Check CO
2
for the minimum load: measure CO
2
in the upper measuring hole of the top heat exchanger; a
value within the margin of the table1 or figures 1 or 2 is acceptable. Note down this value
•
Measure CO
2
in the lower measuring hole of the bottom heat exchanger; a value within the margin of the
table1 or figures 1 or 2 is acceptable. Note down this value Calculate the average of these two measure-
ments: add the upper and lower values and divide by two.
•
If this average CO
2
at minimum matches table 1 or figure 1 or 2, adjustment is correct. If the deviation is
larger than, check and re-adjust burners separately again.
If measurements at maximum and minimum match table 1 or figure 1 or 2, adjustment is completed.
•
Switch burners off (press [SERVICE] buttons on both panels).
C O 2
[ 3 ]
C O 2
[ 3 ]
