23
ADJUSTING AIR AND FUEL RATE
Adjustments - brief description
Adjust the air and oil flow rates at the maximum output (“high flame”) first, by means of the air damper and the adjusting cam
respectively.
Check that the combustion parameters are in the suggested limits.
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.
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
CO
2
(%)
O
2
(%)
Heavy oil
50cSt (7° E) @ 50° C
11 ÷ 12
4.2 ÷ 6.2
Heavy oil
50cSt (7° E) @ 50° C
11 ÷ 12.5
4.7 ÷ 6.7
Summary of Contents for RN510
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Page 65: ...RWF50 2x RWF50 3x User manual M12922CB Rel 1 0 07 2012...
Page 80: ...16 Note Specifications and data subject to change Errors and omissions excepted...
Page 81: ...KM3 Modulator USER MANUAL M12927CA Rel 1 0 10 2020...
Page 82: ...M12927CA MOUNTING 2...
Page 98: ...1 RWF55 5X RWF55 6X User manual M12926CA Rel 0 1 10 2015...
Page 99: ...2 DEVICE INSTALLATION Fixing system Drilling dimensions...
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Page 121: ...23 Note Specifications and data subject to change Errors and omissions excepted...
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