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10. PUTTING THE BOILER INTO OPERATION (INITIAL RUN)
As a heating agent in the heating system it is necessary to use water. The quality of water used in the heating system
must comply with the following parameters:
Hydrogen ion exponent РН 6−8
General hardness not more than 4 mg-eq/L
Iron concentration not more than 0,3 mg/l
If source water hardness exceeds 4 mg-eq/l, it is necessary to install by the water inlet into the boiler a polyphosphates
dose meter, that processes water coming into the boiler, protecting the heat exchange equipment of the boiler from
hardness deposition. Polyphosphate dose meter is not included into the boiler's standards supply package and is
purchased separately.
If source water hardness exceeds 9 mg-eq/l, more powerful water softening installations should be used.
Filling the heating circuit with water and prelaunching check
10.1.
1)
Release the air output valve 20 (see p.13.1, page24) (located on the pump19), turning off its cap for
1,5...2 turns;
2)
Open step-by-step the cold water inlet tap on the DHW line in front of the boiler, heating circuit feed tap
16 (see p.13.1, page24) and stop valves on the direct and reverse lines of the heating circuit (if they are
installed);
Close the boiler's feed tap 16, when the pressure in the heating circuit reaches 1-2 bar, in accordance with
3)
the technical characteristics table (see p.2.2, page 5)according to the pressure indicator readings. The
recommended pressure is 1,5 bar.
If the pressure is lower than 1 bar it is prohibited to put the boiler into operation;
4)
Switch the boiler on, not opening the gas tap, so that the pump completely removes the air from the
heating system. Herewith the pressure may reduce lower than 1 bar and the boiler will show the error 04
(not enough water pressure in the heating circuit). In order to remove the error you need to press the
button K6 (RESET) (see p.3.1, page 7).
5)
Repeat the actions according to the points 1-4 until the pressure in the circuit stabilizes at the level of 1,5
bar, that will indicate that the air is fully removed. The installation of additional air output valves is
recommended at the upper points of the heating system for more fast and complete air removal.
Before a test ignition of the boiler it is necessary to check whether:
1) The boiler installation was effectuated in accordance with the requirements incicated in section 8
(page13);
2) The pressure in the heating system is 1-2 bar ( the recommended pressure is 1,5 bar). If the pressure is
higher than 2 bar – the drain valve 13 must be opened (see p.13.1, page24), reducing the pressure for
1,5 bar. If the pressure is lower than 1 bar – the heating circuit feed tap 16 must be opened and it must
be closed when the pressure reaches the level of from 1 till 1, 5 bar;
3) The air inlet and air outlet pipes are installed and comply with the requirements of section9, (page15);
4) The power line's voltage and frequency correspond with the levels indicated in the table (see p.2.2,
page 5);
5) The type of consumed gas must correspond with the type of gas indicated in the boiler's manual and
the table on the boiler;
6) There is no gas leak;
7) The air outlet valve on the circulation pump is opened;
8) The stop valves on the direct and reverse lines of the heating circuit are opened;
9) The pump is not blocked. To find it out you may screw off the pump's cover plug and turn the pump
shaft back and forth several times (see Scheme 10).
User's manual
Technical staff manual
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