Honeywell krom schroder BCU 440 - Page 3

BCU 440 · Edition 01.17 3
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= To be continued
9 Technical data ................................... 29
9.1 Safety-specific characteristic values .............31
9.2 Housing dimensions ..............................32
9.3 Operating controls................................32
9.4 Installation........................................32
10 Legend ......................................... 33
11 Glossary ........................................ 34
11.1 Waiting time t
W
..................................34
11.2 Safety time on start-up t
SA
......................34
11.3 Ignition time t
Z
..................................34
11.4 Flame simulation/Flame simulation delay time
t
LV
.....................................................34
11.5 Safety time during operation t
SB
................35
11.6 Flame signal
.....................................35
11.7 Fault lock-out
....................................35
11.8 Safety interlocks (Limits) ........................35
11.9 Gas valve V1 .....................................35
11.10 Continuous operation ..........................35
11.11 Diagnostic coverage DC........................36
11.12 Operating mode ................................36
11.13 Safe failure fraction SFF .......................36
11.14 Probability of dangerous failure PFH
D
........36
11.15 Mean time to dangerous failure MTTF
d
.......36
Feedback ...........................................37
Contact.............................................37