Italtherm 35 K, Руководство по установке

Страница: 37 / 56

Green Heating Technology
37
Max heating power adjustment
The maximum heating power output must be set in accordance with the system requirements (stated in
the project) by using the parameter 04 (see page 32) with reference to the "Power adjustment tables"
on page 36. The boiler is factory preset with a standard value, highlighted in the relevant table.
1. Get information about the maximum heating power requirement of the heating system (reported
on the project documentation of the system itself);
2. ensure that there are NOT domestic hot water requests (no open taps) and that the heat produced
by the boiler can be drained by the heating system;
3. enter the technician menu (see "PCB parameters settings (technician menu)" on page 31), select
the parameter 04 and get ready to change its value. The burner ignites;
4. set the parameter 04 to the value that corresponds to the required power input (refer to the "Pow -
er adjustment tables" on page 36);
5. To switch the burner off, quit the technician menu (see also "PCB parameters settings (technician
menu)" on page 31). The boiler switches to OFF mode.
The MAX power for the heating system is adjusted now.
Combustion calibration
Boiler is able to self-calibrate combustion in order to obtain correct CO
2
values on 3 different boiler
power (minimum, average, maximum); moreover boiler keeps on checking combustion and makes little
variations for always getting as better combustion as it can.
Boiler Calibration can be activated by a particular buttons sequences (know by the Technician) and it has
2 following options depending on the parameter 49 (see page 34):
• AUTOMATIC: this calibration is made during boiler production; on the field it should not be done
unless components linked to combustion have been replaced (main PCB, Gas Valve, Fan, Primary
exchanger, Burner, Electrode...). At the end of this procedure it is not allowed any change at val -
ues stored but boiler can work property with correct combustion values (even if they have to be
checked with relevant instruments)
During Combustion Calibration, flues tester should not be used because during this pro -
cedure, boiler can produce more than CO2 needed and test result, in this condition,
could not be accurate and truthfulness. Combustion check with flues tester must be
done after Calibration and not during it.
• MANUAL: this calibration checks again the "Automatic calibration" done previously in production
and allow the technician to modify a bit the results: +o- 3 steps where CO2 % is changing about
+o-0.6%; this means that every step co-0.2% CO2). Manual Calibration should be used
when technician would like to make a more accurate calibration.
f Be sure that Parameter 49 is set to Combustion Calibration needed (AUTOMATIC or MANUAL)
f
activate the Combustion Calibration with relevant buttons sequences (known by Technician);
f the display shows the writing MANU (or AUTO if the automatic calibration is deemed necessary);
Remark:
in any moment, the calibration can be stopped by pressing the button , but the opera -
tion must be restarted and carried out completely in order to store the reference values in the
system.
f once the ignition phase is finished, the system sweeps the three characteristic points: minimum,
ignition and maximum, and displaying, respectively,
LO
,
ME
and
HI
�