baltur COMIST 180 Instructions Pour L'utilisateur page 64

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 si-
multaneous 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 thermo-
stat 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 pro-
be 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 lo-
cal 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 assem-
bly instructions correctly!
· During operation and maintenance, prevent infiltration of
condensate into the command and control equipment.
· Electromagnetic discharges must be checked on the applica-
tion plan.
Control program in the event of stopping, indicating position
of stop
As a rule, in the event of any kind of stop, the fuel flow is cut off
immediately. At the same time, the programmer remains immo-
bile, as does the switch position indicator. The symbol visible on
the indicator reading disk indicates the type of fault.
No start-up, because of failure in closing of a contact
or lock-out stop during or at the end of the command
sequence because of external lights (for example: flames
not extinguished, loss at the level of the fuel valve, de-
fects in the flame control circuit, etc.)
Start-up sequence stops, because the OPEN signal
was not sent to terminal 8 by limit switch contact "a".
Terminals 6, 7 and 15 remain powered until the defect is
eliminated.
P Lock-out stop, because of lack of air pressure signal.
Any lack of pressure from this moment onwards will
cause a lock-out stop!
Lock-out stop because of flame detection circuit malfun-
ction.
Start-up sequence stops, because the position signal
for low flame was not sent to terminal 8 by auxiliary
switch "m". Terminals 6, 7 and 15 remain powered until
the fault is eliminated.
1 Lock-out stop, due to lack of flame signal at the end of
the first safety time.
2 Lock-out stop, because no flame signal was received at
the end of the second safety time (main flame signal with
pilot burners at intermittent operation).
Lock-out stop, due to lack of flame signal during burner
operation.
If a lock-out stop occurs at any moment between the start and
pre-ignition without a symbol, the cause is generally to be attribu-
ted to a premature or abnormal flame signal caused, for example,
by self-ignition of a UV tube.
Stop indications
a-b Start-up program
b-b' "Trips" (without contact confirmation)
b(b')-a Post-ventilation program
LFL ..., Series 01
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LFL ..., Series 02