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t3'
Long preignition time: «Z» connected to terminal 15.
t3n
Postignition time:
- «Z» must be connected to terminal 15
- With short preignition, «Z» remains on until «TSA» has elapsed connec-
tion to terminal 16.
t4
Interval «BV1 – BV2» or «BV1 - LR»: On completion of «t4», vol-
tage is present at terminal 19. The voltage is required to power «BV2»
connected to auxiliary switch «v» in the actuator.
t5
Interval: On completion of «t5», terminal 20 receives power. At the
same time, control outputs 9 to 11 and input 8 are galvanically separated
from the LAL...'s control section.
LAL... is now protected against reverse voltages from the load control
circuit. With the release of «LR» at terminal 20, the startup sequence of
the LAL... ends. After a few idle steps (steps with no contact position
changes), the sequence switch switches itself off.
B
Operating position of the burner
B-C
Burner operation: during burner operation, «LR» drives the air
damper to the nominal load or low-fire position, depending on heat
demand; the release of the nominal load takes place via auxiliary switch
«v» in the actuator and in the event of loss of flame during operation, the
LAL... will initiate lockout. For automatic start repetition, the clearly mar-
ked wire link «B» on the plugin section of the LAL... must be cut away.
C
Controlled shutdown: in the case of controlled shutdown, «BV...»
will immediately be closed. At the same time, the sequence switch is star-
ted to program «t6»
C-D Sequence switch travels to start position «A»
t6
Postpurge time: fan «M2» connected to terminal 7. Shortly after the
start of «t6», terminal 10 receives power and the air damper is driven to
the MIN position. Full closing of the air damper starts only shortly before
«t6» has elapsed initiated by the control signal at terminal 11. During the
following burner off time, terminal 11 is live.
t13
Permissible afterburn time: during «t13», the flame signal input
may still receive a flame signal.
D-A
End of control program: start position
As soon as the sequence switch has reached the start position – having
thereby switched itself off – the flame detector and flame simulation test
will start again.
During burner off times, the flame supervision circuit is live.
Lockout and indication of the stop position
Whenever a fault occurs, the sequence switch stops and with it the
lockout indicator. The symbol appearing above the reading mark indicates
the type of fault:
No start. One of the contacts is not closed (also refer to «Precondi-
tions for burner startup»):
Extraneous light:
Lockout during or after completion of the control program
Examples: nonextinguished flame, leaking fuel valves faulty flame super-
vision circuit.
Interruption of startup. No OPEN signal at terminal 8 from the chan-
geover end switch «a». Terminals 6, 7 and 15 are live until fault has
been corrected
P
Lockout . No air pressure indication at the beginning of the air pres-
sure check. Air pressure failure after the air pressure check.
Defect in the flame supervision circuit.
Interruption of the startup sequence. No positioning signal at termi-
nal 8 from the auxiliary switch «m» for the low-fire position. Terminals
6, 7 and 15 are live until fault has been corrected.
1
Lockout. No flame signal at the end of the safety time.
|
Flame signa has been lost during operation.
A
Consenso all'avviamento (ad esempio tramite il termostato o il
pressostato R dell'impianto
B
Operating position of the burner
B-C
Burner operation: during burner operation, «LR» drives the air
damper to the nominal load or low-fire position, depending on heat
demand; the release of the nominal load takes place via auxiliary switch
«v» in the actuator and in the event of loss of flame during operation, the
LAL... will initiate lockout. For automatic start repetition, the clearly mar-
ked wire link «B» on the plugin section of the LAL... must be cut away.
C
Controlled shutdown: in the case of controlled shutdown, «BV...»
will immediately be closed. At the same time, the sequence switch is star-
ted to program «t6»
C-D Sequence switch travels to start position «A».
During burner off times, the flame supervision circuit is live.
Lockout indication
a-b
Startup sequence
b-b'
Idle step (with no contact confirmation)
b(b')-a Postpurge program
Burner control can immediately be reset after lockout:
Do not press the lockout reset button for more than 10 seconds
The sequence switch always travels to the start position first
After resetting
After rectification of a fault that led to shutdown
After each power failure
During this period of time, power is only fed to terminals 7 and 9...11.
Then, the LAL.... will program a new burner startup sequence
Specifications
Power supply
for LAL2... on request AC 100 V -15 %...AC 110 V +10 %
Frequency
Absorption
Mounting position
Protection
Perm. input current at terminal 1
Perm. current rating of control terminals 3, 6, 7, 9...11, 15...20
Internal fuse
External fuse
Weight
S
L
H
S B
1
A S
b r1
a b
I
a
b
ar1
4
W
R
B
5
fr1
a
b
IX
X I
X III
X II
a
a
b
b
E K 1 *
A R
b r2
L 1
M
E
B R
A
3
2 1
2
1 (3 )
H
A L
E K 2 *
N
AC 230 V -15 / +10 %
50 Hz -6 %...60 Hz +6 %
AC 3.5 VA
optional
IP 40
AC 5 A max., 20 A peak
4 A max., 20 A peak
T6,3H250V according to IEC 127
max. 10 A
Device 1000 g
Plug-in base 165 g
b l
sw
22
22
a r2
6
7
V
F R
M 1
M 2
N
fr2
II
X
V III
V
III
IV
V I
b
a a
b a
b
a
b
a
2 0
1 5
1 6
1 8
1 7
1 9
9
11
L R
S A
v
a
z
M
Z
B V 1
B V 2
7 1 5 3 a 0 7 /0 4 9 6
Q R C 1 ...
b r
2 3
1
Q R B 1 ...
2 3 2 4
a
b
X IV
a
b
V II
a
b
a r3
b
S M
M
1 0
8
m
L K
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