ADJUSTMENT
SCREW
MAXIMUM
OUTPUT
ADJUSTMENT
SCREW
MINIMUM
OUTPUT
The following instructions are intended
exclusively for authorised service per-
sonnel.
1) Maximum output adjustment
- Operate the boiler in “calibration” mode at MAXI-
MUM OUTPUT (see 3.10.1)
- Once the burner is on check
that the CO
2
“MAXIMUM” value corresponds to
that indicated in the table “NOZZLES - PRES-
SURE”.
- if it does not correspond, correct it by turning the
screw “S” CLOCKWISE to decrease it, ANTI-
CLOCKWISE to increase it.
3) Conclusion of the basic calibrations
- once the CO
2
values at minimum and maximum
output have been checked and any adjustments
have been made (sections 1-2):
- disable the timed “calibration” function by switch-
ing o the main switch.
- close the ue gas inspection sample points of the
intake and exhaust terminal
- check that there are no gas leaks.
3.13 - ADJUSTING THE BURNER
2) Minimum output adjustment
- Operate the boiler in “calibration” mode at MINI-
MUM OUTPUT (see 3.10.1)
- Once the burner is on check that the CO
2
“MINI-
MUM” value corresponds to that indicated in the
table “NOZZLES - PRESSURE”.
- Correct it if needed by turning (with a screwdriv-
er) the screw “R”; (Before remove screw cap Q)
CLOCKWISE to increase it, ANTICLOCKWISE to
decrease it
- Remove the cap and insert the CO2 analysis
probe in the ue gas sample point of the intake/
exhaust terminal, see chap. 3.10.2.
All boilers leave the factory already cali-
brated and tested, however in the event
the gas valve recalibration is required:
Attention, during these operations do not take
any samples in domestic hot water mode.
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