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Instructions for the installer
3.27 - BURNER ADJUSTMENT
WARNING!
All the instructions indicated below are for the ex-
clusiveuseofqualiedUNICALservicetechnicians
or installers.
All the boilers are supplied already calibrated and
tested. If it is necessary to change the calibration
due to gas conversion or adaptation to the mains
supply system, the gas valve must be re-calibrated.
(Using service mode function)
MAXIMUMOUTPUT
ADJUSTMENT SCREW
MINIMUM OUTPUT
ADJUSTMENT
SCREW
B) MINIMUM OUTPUT ADJUSTMENT
- Operate the burner to a minimum power following the proce-
dure described on page 45 ‘’sweep’ function (CASCATA MAN
10 %)
- Check that the CO
2
values are within the values indicated
in the table “Burner pressures”
-
If necessary correct the value by turning the adjustment
screw “B” in a CLOCKWISE direction to increase the
value and in an ANTICLOCKWISE direction in order
to decrease it.
A) MAXIMUM OUTPUT ADJUSTMENT
- Remove the cap of the combustion gases sampling point
- Connect a suitable CO
2
gas analyser to the sampling point
in the flue outlet terminal.
- Operate the burner to the maximum power, following the pro-
cedure described on page 45 ‘’sweep’ function (CASCADE
MAN 100 %)
- Check that the C0
2
values are within the values indicated
in the table “Burner pressures”
- If necessary correct the value by turning the adjustment screw
“A” in a CLOCKWISE direction to decrease the value and
in an ANTICLOCKWISE direction in order to increase it.
WARNING!
Remove the cap 2,xredcap3 to the gas
outlet. Insert the CO2 analysis probe 4 on hole
of the cap.
Measurement. remove the cap and close the
outlet exhaust smoke cap 2.
45


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