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When the setting process is finished, switch the boiler off, remove the "U" manometer's tube and (without excessive force) fasten
the closing screw of the measurement point. Put in the metal plug. Re-start the boiler and check whether the ignition is activated
properly for both power stages; check tightness of the measurement point to the gas armature.
5.2. First Heating
The First Heating is a short-term operation of the boiler after its installation and final connection to the heating circuit.
The boiler controls (on the boiler and the room thermostat) should be set to achieve the highest possible HCW temperature and
the fewest possible (operational) stops. Keep the system (the boiler plus the heating circuit) on until it stabilises (i.e., the
temperature at the most distant radiator is stationary) and then for one more hour.
Stop the boiler and write down the reading on the boiler pressure gauge. Carefully purge the entire system and bring the pressure
to the recorded value.
Then let the system cool down and watch whether the pressure does not decrease too fast – if yeas, you have to find the leaks, seal
them and repeat the First Heating procedure.
6. Boiler Maintenance
6.1. Professional Maintenance
The professional preventive maintenance is described in the "Instructions" and in the "Service Booklet."
If fuel conversion (from natural gas to LPG or vice versa) is necessary, the following procedure must be followed. Only
authorised service centres are allowed to carry out the conversion.
The following steps are to be followed:
1.
Dismount the burner from the boiler.
2.
Replace the nozzles with the type suitable for the required fuel.
Number / diameter of nozzles (mm)
20 KLO
30 KLO
40 KLO
50 KLO
60 KLO
Natural gas 2 / 2.65
3 / 2.65
4 / 2.65
5 / 2.65
6 / 2.65
LPG
2 / 1.7
3 / 1.7
4 / 1.7
5 / 1.7
6 / 1.7
3.
If converting from natural gas to LPG, for the 20, 30, 40 and 50 KLO types, cooling rods are mounted on the tubes,
including holders – three rods per tube. The rod in the axis of the ignition electrode is to be shortened by about 35 mm.
If converting from LPG to natural gas, the cooling rods are to me removed from 20, 30, 40 and 50 KLO boilers.
Ends of the electrodes must be above the gap in the burner tube! Check the distance between the electrode
ends – it must be 3 mm.
4.
Mount the burner back into the boiler.
5.
Set the pressure as prescribed for operation – cf. "Boiler Preparation and Start."
6.
Check tightness of the gas piping. Take the following precautions:
a.
Indicate on the boiler, in a suitable manner, the type of fuel for which it has been converted;
b.
Record the conversion, date and identification of the centre that converted the boilers, in the technical
documentation.
Only original parts supplied by the manufacturer or a party authorised by the manufacturer may be used for the
conversion. When converting, the workers must respect requirements for thread connections, specifically, sealing by
materials suitable for the type of work and resistant to the fuel used.
Settings of all elements are to be permanently marked by, e.g., a drop of paint.
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