Siemens LFS1.11A2

44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวัฒนา กทม. 10170.
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Standards and certificates (continued)
The following parameters apply:
Operating
Safety
PFHD
MTTFD
ASN
Flame detector
integrity
SFF
mode
[1/h]
[y]
level up to
LFS1.11A1
RAR9
Continuous
SIL3
1.80E-08
6500
≥99%
LFS1.11A2
operation
LFS1.21A1
Ionization probe
Continuous
SIL3
1.80E-08
6500
≥99%
LFS1.21A2
operation
LFS1.21A1
QRA2 / QRA2M, QRA4 / QRA4M,
Intermittent
SIL2
2.30E-07
510
≥99%
LFS1.21A2
QRA10 / QRA10M
LFS1.21A1
Ionization probe + QRA2 / QRA2M,
Intermittent
SIL2
2.30E-07
510
≥99%
LFS1.21A2
QRA4 / QRA4M, QRA10 / QRA10M
Life cycle
The flame safeguard has a designed life cycle* of 250,000 burner startup cycles which,
under normal operating conditions in heating mode and nominal switching loads,
corresponds to approx. 10 years of service (starting from the date of manufacture on
the nameplate). For industrial applications with reduced switching loads of a maximum
of 0.1 A, the flame safeguard has an increased designed life cycle* of up to 1,000,000
burner startup cycles.
This life cycle is based on the endurance tests specified in standards EN 13611 and EN
298. A summary of the conditions has been published by the European
Control Manufacturers Association (Afecor) (www.afecor.org).
* The designed life cycle is based on use of the flame safeguard according to the
manufacturer’s data sheet. In this case, it is advisable to perform a safety check
or replace the unit. The designed life cycle is not the warranty time specified in the
Terms of Delivery.
Commissioning notes
Concerning connection diagram 7782a06, connection example of two manually
operated burners: Ensure that the drop-out delay time of external relay d is not greater
than 50 ms.
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Building Technologies CC1N7782en 18.04.2018