UniCoElegance/turbo
ISU-485:2020/BO
4. BOILER ADJUSTMENT AND PRELIMINARY SETTING
4.1. Introductory remarks
The purchased boiler is adjusted by the manufacturer according the parameters needed for the type of gas, which is listed
on the rating plate of the boiler and in its documents. If it is necessary to change the parameters or adapt the boiler to
another type of gas; the process of adjusting the boiler and setting the parameters should be performed only by qualified
service team or person. It is allowed to perform above mentioned operations if:
•
the tightness of the gas system connections was checked after the boiler installation and it was confirmed with the
signature and the stamp of the installer,
•
the electrical installation was made in accordance with applicable regulations,
•
the correctness of connections between the boiler and the chimney was checked and confirmed by a qualified chimney
service.
4.2. Adjusting the boiler to combust another type of gas
4.2.1. Selecting the type of gas on the boiler controller
If it is necessary to change the adjustment of the boiler from the natural gas into liquefied gas the parameter P4 needs to
be changed respectively (see section 5.7).
4.2.2. Changes in the gas system of the boiler
The boiler supplied by the manufacturer is designed to combust gas type specified on the rating plate.
The boiler can be adjusted to combust another type of gas but only for this one which the boiler is certified for.The types
of gases are given on the rating plate - in the index designation:
Category II
2E3PB/P
Group 2 – natural gas-
es:
2E-G20
Group 3 – liquefied
gases:
3B/P-G30
Adapting a boiler to another type of gas involves replacing the burner nozzles dedicated to specified type of gas and ad-
justing the minimum and maximum gas pressure range on the modulator (fig.4.2.2.1). Also the regulation of gas pressure
for the start power and maximum power of the boiler control panel (see description in section 4.2.2.3, 4.2.2.4 and 5.7.). The
dimensions of the nozzles and pressure for operation of boilers are given in table 4.2.2.5.
Example of completed label
s.a
After adapting the boiler to combust another type of gas:
•
Cross out on a rating plate the type of gas to which the boiler was adapted by
the manufacturer,
•
Write down the symbol of the gas, to which the boiler has been adjusted and
the set heat load on the appropriate label that is attached bulk to the user ma-
nual. The entrymust be writtenlegibly and indelibly.
•
Label filled in as above should be sticked on the cover near rating plate.
Set for gas:
Liqu-
efied
Gas symbol
3B/P-
G30
Gaspressu-
re
[mbar]
37
.............
......
Set the nominal heat load
........................... [kW]
Adapting the boiler to combust another type of gas can be performed only by a qualified service team. This operation
is not included in the warranty repairs.
1. Main cut-off valve.
2. Cut-off valve .
3. Measuring point of inlet gas pressure.
4. Measuring point of outlet gas pressure.
5. Regulation of gas pressure on the modulator:
A. A maximum pressure adjustment screw of modulator (hexagonal 10 mm
wrench).
B. A minimum pressure adjustment screw of modulator (screwdriver).
C. Protective cap.
6. Connection to the gas system.
Fig. 4.2.2.1 Gas valve with modulator
4.2.2.2. Gas flow regulation in the boiler
Gas flow regulation should be only performed if the boiler is being adjusted to combust another type of gas or during the
replacement of gas unit and also for test purposes during first launch. All the regulations should be performed in accor-
dance to boiler data included in the table 4.2.2.5.
