Honeywell Krom Schroeder BCU 480 - Page 4

BCU 480 · Edition 03.16l 4
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= To be continued
9.4 Housing dimensions ..............................77
9.5 Operating controls................................77
9.6 Installation ........................................77
10 Legend ..........................................78
11 Glossary ........................................ 79
11.1 Waiting time t
W
..................................79
11.2 Safety time on start-up t
SA
......................79
11.3 Ignition time t
Z
..................................79
11.4 Flame simulation/Flame simulation delay time
t
LV
.....................................................79
11.5 Safety time during operation t
SB
............... 80
11.6 Flame signal .................................... 80
11.7 Fault lock-out ................................... 80
11.8 Safety interlocks (Limits) ....................... 80
11.9 Pilot gas valve V1 ............................... 80
11.10 Main gas valve V2 ..............................81
11.11 Continuous operation ..........................81
11.12 Air valve.........................................81
11.13 Diagnostic coverage DC........................81
11.14 Mode of operation..............................81
11.15 Safe failure fraction SFF .......................81
11.16 Probability of dangerous failure PFH
D
........82
11.17 Mean time to dangerous failure MTTF
d
.......82
Feedback .......................................... 83
Contact............................................ 83