47
t2', t3', t3':
These times are valid only for series 01 or LFL1.335, LFL1.635, LFL1.638 burner control and command
equipment.
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.
A
Consensus for start-up by means of installation thermostat or pressure switch “R”.
A-B
Start-up program
B-C
Normal burner operation (on the basis of “LR” power regulator control commands)
C
Stop controlled by “R”
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
following the assembly instructions correctly!
•
During operation and maintenance, prevent infiltration of condensate into the command and control
equipment.
•
Electromagnetic discharges must be checked on the application plan.
CONTROL BOX FOR LFL 1...
SERIES 02 GAS BURNERS
N° 7451
Rev. 10/1997
