23.
Use the + key to ramp the burner up through P1-P9 allowing the burner to stop at
each set point long enough for the flame to settle to confirm stability. If the flame
fails at any setpoint, reset the burner and return to the “cold” settings as described
in step 14 and increase the fuel damper valve opening by 1° for that setpoint.
Attempt to reignite the burner as described in steps 16 and 18 and ramp up through
the set-points again. This process may need repeating for multiple setpoints and/or
multiple times for a single set-point until the burner will run through all setpoints
toP9.
24.
Monitor the flue gas emissions with a flue gas analyser set up at an appropriate test
point in the flue.
25.
As the boiler pressure approaches 10 bar begin opening the steam valve partially
and continue to make continuous adjustments as required to maintain the boiler
pressure between 9 bar and 10bar.
26.
Monitor the excess oxygen in the flue gas, with the factory fuel damper valve
settings (shown alongside the VSD settings and factory air damper valve settings
in the table in step 24) and a boiler pressure of 10 bar the flue gas should contain
around O
2
across every setpoint. Fine
tuning of the main gas valve pressure
regulator is likely required to obtain exactly 6.5%
O
2
.
This adjustment should be made while the boiler is maintained at 10 bar and firing at P9. Adjust
the pressure regulator until a steady O
2
is achieved. Check the output pressure of the main gas
valve using the mono-meter, it should be 1.5-2 mbar. At 6.5% O
2
there should be <30PPM NOx
and <20PPM Co.
27.
Use the - key to step the burner back to firing at P8 and monitor the emissions.
Again, make continuous adjustments to the steam valve to maintain the boiler
pressure between 9 and10 bar. The flue gasses should contain near 6.5% O
2
some
minor adjustments to the fuel damper valve may be required to achieve the exact
value. Increasing the opening of the fuel damper valve reduces the excess oxygen
and vice versa. Tune the fuel damper valve until a steady 6.5% O
2
is achieved.
Repeat this process for obtaining a 6.5% O
2
value for each setpoint down to P1.
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