Unigas G270X, Руководство по установке, использованию и обслуживанию

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PART III: OPERATION
25
AIR FLOW AND FUEL ADJUSTMENT
(First) Start-up preliminary operations - gas supply
Recommended actions to be carried out in sequence:
1
Check the burner and all its components are installed correctly
2 Check that all electrical and mechanical parts are connected correctly
3 Check that there is water or other vector fluids in the generator
4 Check that the ventilation gates/dampers in the plant are open and the stack is free
5 Connect the gauges used to adjust and check pressures on the incoming line and on the head, air and fuel side.
6 Open the thermostatic series and the safety chain
7 Turn the main switch on the panel front with the "ON/OFF" selector to position "ON".
8 Check the phase and neutral position is correct
9 Open the manual shut-off valves slowly, in order to prevent any water hammers that might seriously damage valves and pressure
regulator
10 Check the sense of rotation of the electrical motors
11 Bleed the line, getting rid of all the air in the pipe as far as the main gas valve
12 Ensure the pressure entering the main valves is not excessive due to damage to or wrong adjustment of the line pressure regulator
13 Ensure the gas supply minimum pressure is at least equal to the pressure required by the pressure curves - burnt gas flow
Drive the burner to high flame stage (please refer to the LMVx documentation attached to this manual).
Start-up procedure
1 Turn the burner on.
2 the LMV control box starts the system test cycle: the AZL display shows the System Test message; at the end of the test, it shows
the main page and the system stops (the safety chain is open) waiting for the startup enabling signal (standby - Program phase no.
12)
Main page
3 check the fan motor rotation (see related paragraph).
4 make the safety chain enabling the system to start up
5 the combustion cycle starts: the system will show the operating stages
- Prepurging (program phase no.30)
DANGER! Venting the air from the piping must take place in safe conditions, avoiding dangerous concentrations
of fuel in the rooms. You must therefore ventilate the rooms and wait long enough for the gases to dissipate out-
side before switching on.
Attention! if it is necessary to change the head position, repeat the air and fuel adjustments described above.
WARNING! During commissioning operations, do not let the burner operate with insufficient air flow (danger of
formation of carbon monoxide); if this should happen, make the fuel decrease slowly until the normal combustion
values are achieved.
WARNING! the combustion air excess must be adjusted according to the values in the following chart.
Recommended combustion parameters
Fuel
Recommended (%) CO
2
Recommended (%) O
2
Natural gas 9,0 ÷ 10 3,0 ÷ 4,8
Setpoint 80°C
Act.value 78°C
Fuel GAS
Standby 12