Unigas PN91, Руководство по установке, использованию и обслуживанию

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C.I.B. UNIGAS - M039196CC
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ADJUSTING AIR AND FUEL RATE
Adjustments - brief description
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Adjust the air and oil flow rates at the maximum output (“high flame”) first, by means of the air damper and the adjusting cam res-
pectively.
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Check that the combustion parameters are in the suggested limits.
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Then, adjust the combustion values corresponding to the points between maximum and minimum: set the shape of the adjusting
cam foil. The adjusting cam sets the air/fuel ratio in those points, regulating the opening-closing of the fuel governor.
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Now set the low flame output, acting on the low flame microswitch of the actuator in order to avoid the low flame output increasing
too much or the flues temperature getting too low to cause condensation in the chimney.
Now, adjust the burner according to the actuator model provided.
ATTENTION: before starting the burner up, be sure that the manual cutoff valves are open. Be sure that the mains
switch is closed.
ATTENTION: 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.
Before starting up the burner, make sure that the return pipe to the tank is not obstructed. Any obstruction would
cause the pump seal to break.
IMPORTANT! 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
Heavy oil 11 ÷ 12.5 4.7 ÷ 6.7