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t2', t3', t3':
These times are valid only for series 01 or LFL.335, LFL.635, LFL.638 burner control and command equip-
ment.
They are not valid for types of Series 032, since they involve simultaneous activation of cams X and VIII.
Working
The above diagrams illustrate both the connection circuit and the sequencer mechanism control program.
Consensus for start-up by means of installation thermostat or pressure switch "R".
A
A-B
Start-up program
Normal burner operation (on the basis of "LR" power regulator control commands)
B-C
Stop controlled by "R"
C
C-D
Return of programmer to start-up position "A", post-ventilation.
During periods of inactivity of the burner, only the command outputs 11 and 12 are powered, and the air
damper is in the CLOSED position, determined by limit switch "z" of the air damper servo motor. During
the probe test and false flame test, the flame supervision test is also powered (terminals 22/23 and
22/24).
Safety standards
•
In association with the use of QRA..., earthing of terminal 22 is compulsory.
•
The power cables must conform to existing national and local standards.
•
LFL1... is a safety device, and it is therefore forbidden to open it, tamper with it or modify it!
•
The LFL1... device must be completely insulated from the mains before carrying out any operations on it!
•
Check all the safety functions before activating the unit or after replacing a fuse!
•
Provide protection against electric shock on the unit and all electric connections. This is ensured by fol-
lowing the assembly instructions correctly!
•
During operation and maintenance, prevent infiltration of condensate into the command and control equip-
ment.
•
Electromagnetic discharges must be checked on the application plan.
56 /
000608006_2007/06
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