Unical KUTter R 28, Installation And Servicing Manual

Page: 82 / 97

35
Installation Instructions
ENGLISH
2) Minimum output adjustment
- Operate the boiler in “calibration” mode at MINI-
MUM OUTPUT (see 3.11.1)
- 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 removing the tap ‘’Q’’ and
turning (with a screwdriver) the screw “R”;
CLOCKWISE to increase it, ANTICLOCKWISE
to decrease it
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 3.11.1)
- 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 off the main
switch.
- close the flue gas inspection sample points of the
intake and exhaust terminal
- check that there are no gas leaks.
3.12 - ADJUSTINg THE BUrNEr
(S)
ADJUSTMENT SCREW
MAXIMUM OUTPUT
(R)
ADJUSTMENT SCREW
MINIMUM OUTPUT
For proper operation, the CO
2
values
must be calibrated with particular at-
tention, observing the values indicated
in the table.
- Remove the cap and insert the CO2 analysis
probe in the flue gas sample point of the intake/
exhaust terminal, see chap. 3.11.2.
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.