Siemens LAL2.25 User Manual

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Building Technologies Division CC1N7153en
21.09.2016
Type summary
The type references given below apply to the LAL without plug-in base and without flame detector. For ordering information for plug-in bases and other accessories, see Accessories.
Switching times are given in the order of the startup sequence, valid for 50 Hz mains frequency. At 60 Hz frequency, switching times are about 17 % shorter.
The type references apply to burner controls operating on AC 230 V, 50...60 Hz.
Article no. Type
Flame
supervision
with ...
A
ir pressure supervision
Semi-automatic startup No lockout Start prevention in extraneous light Flash steam gene
r
ators
Universal use Medium- or heavy-oil burners
Times in seconds
QRB QRC RAR9
t1 TSA t3 t3‘ t3n t4 t5 t6 t7 t8 t10 t11 t12 t13 t16 t20
BPZ:LAL1.25 LAL1.25 ³) ● ● ● 22,5 5 2,5
From the
start ¹)
15 7,5 7,5 15 2,5 47
10 ²)
Optional Optional 15 5 35
BPZ:LAL2.14 LAL2.14 ³) ● ● ● ● ● 10 4 2
From the
start ¹)
10 8 4 10 2 30 6 Optional Optional 10 4 32
BPZ:LAL2.25 LAL2.25 ³) ● ● ● ● ● 22,5 5 2,5
From the
start ¹)
15 7,5 7,5 15 2,5 47
10 ²)
Optional Optional 15 5 35
BPZ:LAL2.65 LAL2.65 ³) ● ● ● ● ● 66,5 5 2,5
From the
start ¹)
15 7,5 7,5 15 2,5 91 10 Optional Optional 15 5 12,5
BPZ:LAL3.25 LAL3.25 ³)
4
) ● ● ● ● ● ● ● 22,5 5 2,5
From the
start ¹)
15 7,5 7,5 15 2,5 47
10 ²)
Optional Optional 15 5 35
¹) With air pressure supervision: From the time the air pressure signal is received
²) Does not apply to LAL1
³)
Available as AC 100...110 V versions; add type suffix «– 110 V» when ordering. Flame supervision only with QRB or RAR
4
) Special applications such as incinerator plants
Legend of times
TSA Ignition safety time t7 Interval between start command and power at terminal 7 (start delay for fan motor «M2»)
t1 Prepurge time with air damper open t8 Duration of startup sequence (without running time «t11» and running time «t12»)
t3 Preignition time, short (ignition (Z) to terminal 16) t10 Only with LAL2 / LAL3: Interval from start to the beginning of the air pressure check
t3‘ Preignition time, long (ignition (Z) to terminal 15) t11 Air damper running time to the OPEN position
t3n Postignition time (ignition (Z) to terminal 15) t12 Air damper running time to the low-fire position MIN
t4 Interval between voltage at terminals 18 and 19 (fuel valve 1 (BV1) - fuel valve 2 (BV2)) t13 Permissible afterburn time
t5 Interval between power at terminals 19 and 20 (fuel valve 2 (BV2) - load controller) t16 Interval until OPEN command for the air damper is given
t6 Postpurge time (with fan motor «M2») t20 Not with all LAL: Interval to the self-shutdown of the sequence switch after startup

Siemens LAL2.25 Specifications

General

Brand	Siemens
Model	LAL2.25
Category	Control Unit
Language	English