User’s manual
13.3.2 Gas analysis function
Gas analysis function enables to control, analyze combustion process and adjust a gas supply regulator (see p.
11.2
and
11.3
, page 22). This function works in CH and Combined modes.
To activate a gas analysis function it is necessary to hold the button К6 (RESET) until a symbol
will be
displayed. Within 15 minutes a boiler will work on the rated power. Afterwards it will automatically come back to the
operating mode. To turn the gas analysis function off before than in 15 minutes it is necessary at first to Switch the
boiler off and then switch it on using a button К5.
13.4.
13.4. Boiler’s operating logic
Boiler’s starting up in the heating mode happens if actual water temperature in the heating system is lower than a
set one for 5 °С. Boiler starts up working in DHW mode if there is water flow in DHW line present.
The following pre-starting operations happen while a boiler starts up:
1)
Electronic board 22 (see p.
13.1
, page.24) checks voltage;
2)
Water pressure sensor 25 works out. Signal about water presence in CH goes to the board. If CH is not full,
boiler’s starting up stops;
3)
Electronic board checks status of the thermo relay 9 and operating conditions of CH temperature sensors 10
and DHW 14. Failure of any of these sensors causes the stoppage of boiler’s starting cycle;
4)
On the display of control panel is mapped a value of CH and DHW water temperature (depends on operating
mode).
If boiler’s starting up stops due to any failure, an error code is displayed (see p.
14.1
, page 29).
13.4.1. Boiler’s operating in CH:
1)
Electronic board 22 (see p.
13.1
, page 24) provides voltage to the pump 19 (to check the voltage on the
pump’s terminals is possible by means of a tester). Pump starts working (noise of running pump is heard);
2)
Electronic board 22 inquires an air pressure switch 1, its pins should be open If they are closed, boiler’s staring
up stops;
3)
Electronic board provides voltage to the fan’s electric motor 2. Fan starts working (it is heard). By means of
the air flow there is pressure difference created in the air pressure switch 1. To the electronic board a signal
about draught is provided. If signal is absent, boiler’s starting up stops;
4)
A pause for ventilation of combustion chamber is hold (it is necessary for gas removal in case of previous fail
start up);
5)
igniter 23 by the signal of the electronic board provides high voltage to the ignition plug 6 within~ 10 seconds
(sound of discharge is heard);
6)
electronic board provides a signal for opening a gas valve in the gas supply regulator 8, and gas is coming to
the burner block 5;
7)
if ignition happened (if casing is removed, you can see the flame through the viewing window), an ionization
plug11 sends a signal to the electronic board about successful ignition. If a signal from ionization plug 11 is
absent, electronic board repeats a procedure of boiler’s staring up from the beginning. There are 2 consecutive
start up attempts taken. If both attempts failed, electronic board stops ignition;
8)
Electronic board changes voltage in the modulator coil of gas supply voltage 8. Gas supply regulator increases
gas supply to the burner block up to maximal power in order to quickly warm the water in the heating system
up to the set temperature;
9)
Electronic board equals a signal of CH temperature sensor 10 with a value set by the user by means of buttons
К3 и К4 (see p.
3.1
, page7). If the difference of set temperatures is more than 1 °С, electronic board changes
voltage on the gas supply regulator in order to change gas supply to the burner block in accordance with CH
requirement.
13.4.2
Boiler’s operation in DHW:
1)
DHW flow sensor 15 sends a signal (see p.
13.1
, page 24) about presence of water flow in DHW;
2)
Electronic board inquires air pressure switch 1, its pins should be opened. If they are closed, boiler’s start up
stops;
3)
Electronic board provides voltage to the electric motor of fan 2. Fan starts working (it is heard). Air flow
creates pressure differences in the air pressure switch 1. A signal about draught presence is given to the
electronic board 22. If signal is absent, boiler’s start up stops;
4)
A pause for ventilation of combustion chamber is hold (it is necessary for gas removal in case of previous fail
start up);
5)
igniter 23 by the signal from electronic board provides high voltage to the ignition plug 6 within ~ 10 seconds
(sound of discharge is heard);
6)
electronic board provides a signal for opening a gas valve in the gas supply regulator 8, and gas is coming to
the burner block 5;
7)
if ignition happened (if casing is removed, you can see the flame through the viewing window), an
ionization plug11 sends a signal to the electronic board about successful ignition. If a signal from
