baltur COMIST 122 DSPGM Manual De Instrucciones página 31

t2´, t3´, t4´:
Such time intervals are valid only for burner command and con-
trol 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.
Operation
The drawings above show both the connection circuit and the
sequencer mechanism control programme.
A Consensus for start-up through system thermostat or "R"
pressure switch.
A-B
Start-up programme
B-C Burner standard operation (according to the "LR" power
regulator controls)
C Controlled stop through "R"
C-D Programmer return to start-up position A, post-ventilation.
During periods of burner inactivity, only the 11 and 12 con-
trol outputs are powered, and the air gate is CLOSED by
the "z" limit switch of the relevant servomotor. During the
probe test and the false flame test, also the flame supervi-
sion circuit is powered (terminals 22/23 and 22/24).
Safety standards
· Using the QRA..., earthing of terminal 22 is compulsory.
· The electric wiring must comply with the national and local
prevailing laws.
· LFL1... is a safety equipment and as such it must not be
opened, tampered with or modified!
· LFL1 equipment... must be completely insulated from the
mains before performing any operation on it!
· Check all safety functions before activating the unit or after
replacing any fuse!
· Provide the unit and all electric connections with a protection
against electric shock. This is ensured by a correct assembly!
· During the operation and any maintenance work prevent
condensate water from seeping in the command and control
equipment.
· The electromagnetic discharges must be checked on the
application plane.
Control programme 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 disc indicates the fault type.
No start-up, because of failed closure of one contact, or
shutdown during or at the end of the control sequence due
to external lights (for example not extinguished flames, loss
at the level of fuel valves, flame control circuit faults, etc.)
Stat-up sequence interruption, because the OPEN signal
has not been 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 shut-
down!
Shutdown due to flame detection circuit malfunction.
Start-up sequence interruption, since the position signal
of low flame has not been sent to terminal 8 from auxiliary
switch "m". Terminals 6, 7 and 15 remain live until fault
removal!
1 Shutdown, due to missing flame signal at the end of the
(first) safety time.
2 Shutdown, since no flame signal has been received at the
end of the second safety time (main flame signal with pilot
burners at intermittent service).
Shutdown, due to no flame signal during burner operation.
If a shutdown occurs between start-up and pre-ignition with no
symbol, usually the cause is a premature, i.e. faulty, flame signal
caused for example by the self-ignition of an UV pipe.
Shutdown indications
a-b Start-up programme
b-b'
"Trips" (without contact confirmation)
b(b')-a Post-ventilation programme
LFL1..., series 01
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LFL1..., series 02