baltur COMIST 180 DSPNM User Instruction Manual page 34

t2´, t3´, t4´:
Such time intervals are valid only for burner command and
control equipment of series 01, i.e. LFL1.335, LFL1.635,
LFL1.638.
They do not apply to burners of the series 02 since they have a
simultaneous activation of the x and Viii cams.
fOperation
The drawings above show both the connection circuit and the
sequencer mechanism control program.
a
Start-up confirmation by means of thermostat or the
installation 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
Programmer return to start-up position A, post-ventilation.
During periods of burner inactivity, only the 11 and
12 control outputs are powered and the air damper
is CLOSED by the "z" limit switch of the relevant
servomotor. During the probe test and the false flame test,
also the flame supervision circuit is powered (terminals
22/23 and 22/24).
safety standards
· In association with the use of QRA..., grounding 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.
· During use and maintenance, take care to prevent any
infiltration of condensation water on the controls.
· Electromagnetic emissions must be verified during use.
Control program in case of stopping and indication of stop
position
As a rule, in the event of any kind of stop, the fuel flow is immediately
cut off. At the same time both the programmer and the switch position
indicator remain in the same position. The symbol on the indicator
reading disk indicates the fault type.
no start-up, due to failure of a contact or lock-out stop
to close during or at the end of the command sequence
because of external lights (for example: flames not
extinguished, leak of the fuel valve, defects 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 live until fault removal!
P shutdown, due to no air pressure signal. from this
moment on, any missing air pressure indication triggers
a shutdown!
Lock-out stop due to malfunction of the flame detection
circuit.
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 live until fault removal!
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 shutdown occurs between start-up and pre-ignition with no
symbol, usually the cause is a premature flame, i.e. faulty, flame
signal caused for example by the self-ignition of an UV pipe.
shutdown indications
a-b Start-up program
b-b'
"Trips" (without contact confirmation)
b(b')-a Post-ventilation program
LfL1..., series 01
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LfL1..., series 02