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Date 1
BFP 21 L3 Oil Pump
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Date 2
BFP 21 Two-Pipe Conversion
071N0041
071N0064
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Date 3
BFP 11 L3 Oil Pump
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Date 4
BFP 11 Two-Pipe Conversion
071N0046
071N0063
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Date 5
Left and Right Rotation
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Date 6
Oil Supply through the Pump
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Date 7
BHO 70 Series Control Box
New Type Remarks
BHO 71.10 One-stage systemBHO 72.10 Two-stage systemBHO 72.11 Two-stage system, short pre-purge/long post-ignitionBHO 73.10 Two-stage system, short post-ignition (terminals 6 and 7)BHO 74.10 Two-stage burners above 30 kg/h + WLE
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Date 8
Setting the box to diagnostics If a fault occurs, the burner control will lockout, this is shown
by a constant red light in the press button. The reason for lockout can be read by means of flash codes
in the press button. Press the button and keep it down for 5 seconds, the control
will change to show flash codes. The flash code is shown at intervals of 2 seconds, to return to
“reset mode” press the reset button and keep it down for 5 seconds.
The control is reset by pressing the reset button shortly. Note! It is only possible to reset the control in “reset mode”. When reset, the control will try to restart, but if the fault still
exists or a new one has occurred, the control will lockout again.
In the event of under-voltage, the control will take up a waiting position. This is indicated by a flash code of 8 flashes from the press button. When the voltage is within the work area, the flash code stops and the control starts as normal.
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Date 9
Diagnosis Flash Codes
False light 2 flashes
No flame when safety time elapses 3 flashes
More than three restarts in the same cycle 4 flashes
Max. waiting time on pre-heater overrun (10 min)
5 flashes
Supply voltage above 264 V a.c. 6 flashes
Supply voltage below 185 V a.c. 8 flashes
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Date 10
Nozzle Spray Patterns
Kerosene Nozzles Standard Nozzles
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Date 11
Nozzle Spray Angles
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Date 12
Construction of a Nozzle