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CONTROL BOX LOA 24.171 B27

CONTROL BOX LOA 24.171 B27. FEATURES:. # Nominal el. supply 220 -15%+10% VAC. # Under voltage: 165 VAC. # Electrical protection IP 40. # Electrical polarity must be respected. # Flame signals: operation reliable value min 70µA max operation value 110µA

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CONTROL BOX LOA 24.171 B27

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  1. CONTROL BOX LOA 24.171 B27 FEATURES: # Nominal el. supply 220 -15%+10% VAC # Under voltage: 165 VAC # Electrical protection IP 40 # Electrical polarity must be respected # Flame signals: operation reliable value min 70µA max operation value 110µA at beginning max value 5.5µA

  2. CONTROL BOX LOA 24.171 B27 Control program in the event of fault: · If a fault occurs, the supply of fuel is immediately interrupted. · With every lockout, the control outputs will be de-energized in less than one second, while terminal 10 (AL) for the remote indication of lockout receives voltage. · The LOA24 can be reset no earlier than 50 seconds after lockout. Extraneous light /premature flame signal · During the pre-purge time, no flame signal may be present. If, however, a signal is delivered during this period of time, the LOA24 locks out on expiry of the pre-purge and safety time. Under these circumstances, the oil valve does not open. An erroneous flame signal can be caused, for instance, by: – premature establishment of flame due to a leaking oil valve – extraneous light – a short-circuit in the detector or its wiring – faults in the flame signal amplifier, or similar Non-appearance of flame · If, at the end of the safety time, there is no flame signal, the LOA24 will immediately lock out.

  3. CONTROL BOX LOA 24.171 B27 Flame failure during operation · On flame failure during operation, the LOA24 will immediately shut down the fuel supply and automatically recycle (restart attempts). · If flame failure occurs on completion of «t4» (15”sec from the establishment of the flame), almost the complete startup sequence will be restarted. Undervoltage detection · With burner controls featuring undervoltage detection, an additional electronic circuit ensures that in the event of mains voltages below about 165 V, burner startup will be prevented, or - without opening the oil valve - the burner control locks out. Indications · The fault position is indicated by the lamp integrated in the reset button.

  4. 0 0 0 0 3 0 3 0 3 0 3 0 SERVOMOTOR STA 4,5 B 0.37/6 II III I (0°) IV I II (50°) V II I III (40°) III IV-V (30°) IV-V FEATURES: # Rotation angle 90° # Rotation time 4.5” # Nominal Torque 0.8 Nm # Operating current 6 A

  5. SERVOMOTOR STA 4,5 B 0.37/6 SERVOMOTOR Cam I: Set to 0° (air damper closed in shut-down position) To open partially, increase this setting. Cam II: Factory set to 50°. Controls the position of the air damper at the 2nd stage - it follows the servomotor only when opening. To reduce the angle, go to the 1st stage, reduce the angle, and return to 2nd stage to check the effect of your adjustment. Cam III: Factory set to 40°. Enables the 2nd stage valve. Set it between cams IV-V, so that it always anticipates cam II. Cam IV-V: Factory set to 30°(V anticipates a bit IV to win the isteresis phoenomena). Controls the position of the 1st stage and must always anticipate cams II and III. It follows the servomotor only when closing. To increase the angle, go to the 2nd stage, increase the setting angle, and return to 1st stage to check the effect of your adjustment. NOTE: If you increase the angle from the 1st stage position while the burner is operating, the burner will stop.

  6. 1 2 3 T8 T7 T6 B5 III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  7. 1 2 3 T8 T7 T6 B5 1 IGNITION PROCEDURE: 0” III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS Switch ON main supply N L

  8. 1 2 3 T8 T7 T6 B5 2 IGNITION PROCEDURE: 0” III II I M On the servomotor, a relay is energised first N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  9. 1 2 3 T8 T7 T6 B5 3 IGNITION PROCEDURE: 0” III II I M The servomotor begins to open N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  10. 1 2 3 T8 T7 T6 B5 4 IGNITION PROCEDURE: 0” III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  11. 1 2 3 T8 T7 T6 B5 5 IGNITION PROCEDURE: 1.5” III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA The servomotor stops at a value a bit higher than low flame position 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  12. Immediately (if no lock out occured) there are two output: # 8 and, throughtout # 3, # 6 1 2 3 T8 T7 T6 B5 6 IGNITION PROCEDURE: 1.5” III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 The control box begins its cycle, as energised at # 1 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  13. 1 2 3 T8 T7 T6 B5 7 IGNITION PROCEDURE: 1.5” PRE-PURGE III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  14. 1 2 3 T8 T7 T6 B5 8 IGNITION PROCEDURE: 1.5” PRE-PURGE III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  15. The servomotor goes back a bit to avoid the isteresis phoenomena 1 2 3 T8 T7 T6 B5 9 IGNITION PROCEDURE: 1.5÷2” PRE-PURGE III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  16. The servomotor goes back a bit to avoid the isteresis phoenomena 1 2 3 T8 T7 T6 B5 10 IGNITION PROCEDURE: 1.5÷2” PRE-PURGE III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  17. 1 2 3 T8 T7 T6 B5 11 IGNITION PROCEDURE: 1.5÷2” PRE-PURGE III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  18. 1 2 3 T8 T7 T6 B5 12 IGNITION PROCEDURE: ~15” IGNITION III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 The control box supplies the safety valve M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  19. 1 2 3 T8 T7 T6 B5 13 IGNITION PROCEDURE: ~15” IGNITION III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M The flame must be detected by 10 secs VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  20. 1 2 3 T8 T7 T6 B5 14 IGNITION PROCEDURE: ~30” 1st =>2° STAGE III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA An internal contact of the box changes from # 6 to # 5 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  21. 1 2 3 T8 T7 T6 B5 15 IGNITION PROCEDURE: ~30” 1st =>2° STAGE III II I M On the servomotor, a relay is energised N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  22. 1 2 3 T8 T7 T6 B5 16 IGNITION PROCEDURE: ~30” 1st =>2° STAGE III II I M The servomotor opens N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  23. 1 2 3 T8 T7 T6 B5 17 IGNITION PROCEDURE: ~30...” 1st =>2° STAGE III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  24. 1 2 3 T8 T7 T6 B5 18 IGNITION PROCEDURE: ~30...” 1st =>2° STAGE III II I M Cam III energises V H/L N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  25. 1 2 3 T8 T7 T6 B5 19 IGNITION PROCEDURE: ~30...” 1st =>2° STAGE III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  26. 1 2 3 T8 T7 T6 B5 20 IGNITION PROCEDURE: ~30...” 1st =>2° STAGE III II I M The servomotor stops at 50° N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  27. 1 2 3 T8 T7 T6 B5 21 HIGH FLAME III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  28. 1 2 3 T8 T7 T6 B5 22 HIGH FLAME => LOW FLAME III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  29. 1 2 3 T8 T7 T6 B5 23 HIGH FLAME => LOW FLAME III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  30. 1 2 3 T8 T7 T6 B5 24 HIGH FLAME => LOW FLAME III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  31. 1 2 3 T8 T7 T6 B5 25 HIGH FLAME => LOW FLAME III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  32. 1 2 3 T8 T7 T6 B5 26 HIGH FLAME => LOW FLAME III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  33. 1 2 3 T8 T7 T6 B5 27 HIGH FLAME => LOW FLAME III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  34. 1 2 3 T8 T7 T6 B5 28 LOW FLAME III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  35. 1 2 3 T8 T7 T6 B5 29 LOW FLAME => STAND-BY III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  36. 1 2 3 T8 T7 T6 B5 30 LOW FLAME => STAND-BY III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  37. 1 2 3 T8 T7 T6 B5 31 LOW FLAME => STAND-BY III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

  38. 1 2 3 T8 T7 T6 B5 32 LOW FLAME => STAND-BY III II I M N 3 10 11 2 12 8 32 1 5 6 N N 4 IV V TA 2 1 6 7 9 3 4 5 8 M VH/L VS I 1-2 I1 B4 T2 N L1 S3 T1 TR TH/L TS N L

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