Honeywell BCU 460 - Page 3

BCU 460, BCU 465 · Edition 11.19 3
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= To be continued
11.3 Scanning the parameters........................72
11.4 Flame control ....................................73
11.4.1 Burner 1 flame signal FS1 switch-off threshold...73
11.4.2 Burner 2 flame signal FS2 switch-off threshold...73
11.4.3 Flame simulation check in standby position ...... 74
11.4.4 High temperature operation .......................75
11.5 Behaviour during start-up .......................78
11.5.1 Burner 1 start-up attempts ........................78
11.5.2 Burner application .................................79
11.5.3 Safety time 1 t
SA1..............................................83
11.5.4 Flame proving period 1 t
FS1
.......................83
11.6 Behaviour during operation .....................84
11.6.1 Restart..............................................84
11.6.2 Minimum operating time t
B
.......................85
11.6.3 Auxiliary gas function ..............................86
11.7 Safety limits......................................87
11.7.1 Delayed low air pressure protection.................87
11.7.2 Safety time during operation .......................88
11.8 Air control ........................................89
11.8.1 Pre-purge time t
PV
.................................89
11.8.2 Pre-ventilation time t
VL......................................89
11.8.3 Over-run time t
NL ..............................................90
11.8.4 Running time selection ............................90
11.8.5 Running time ........................................91
11.8.6 Over-run.............................................91
11.8.7 Air actuator control .................................93
11.8.8 Air actuator can be activated externally on start-
up ..........................................................95
11.8.9 Air actuator in the event of fault....................95
11.8.10 Pre-ventilation/flameless ........................96
11.8.11 Flameless operation ...............................97
11.8.12 Combustion mode ................................98
11.8.13 Over-run time, flameless tNL.....................99
11.9 Valve check ....................................100
11.9.1 Valve proving system..............................100
11.9.2 Relief valve (VPS)..................................100
11.9.3 Measurement time for V
p1
........................101
11.9.4 Valve opening time t
L1
............................101
11.10 Behaviour during start-up....................102
11.10.1 Minimum pause time t
MP
.......................102
11.11 Manual mode.................................102
11.11.1 Operating time in Manual mode.................102
11.12 Sensors.......................................103
11.12.1 Function of sensor 1 .............................103
11.12.2 Function of sensor 2.............................104
11.12.3 Function of sensor 3 .............................105
11.12.4 Proof of closure function test period ............105
11.13 Communication ..............................106
11.13.1 Fieldbus communication ........................106
11.13.2 K-SafetyLink .....................................106
11.13.3 Safety interlocks (bus) ...........................107
11.13.4 Purge (bus).......................................107
11.13.5 High temperature operation (bus)...............107
11.13.6 LDS (bus) ........................................107
11.14 Interface parameters .........................108
11.14.1 Flame control ....................................108
11.14.2 Air actuator.......................................109
11.14.3 Function of terminal 64..........................112
11.15 Functions of contacts 80 to 97 ..............113
11.15.1 Contact 80, 81/82 function .....................113
11.15.2 Contact 90, 91/92 function .....................113
11.15.3 Function of contact 95/96 ......................113
11.15.4 Function of contact 95/97 ......................113
11.15.5 Contact 85/86, 87 function .....................113
11.16 Functions of inputs at terminals 1 to 7 and
35to41 .............................................114
11.16.1 Function of input 1 ..............................114
11.16.2 Function of input 2 ..............................115
11.16.3 Function of input 3 ..............................115
11.16.4 Function of input 4 ..............................115
11.16.5 Function of input 5 ..............................115
11.16.6 Function of input 6 ..............................115
11.16.7 Function of input 7...............................115
11.16.8 Function of input 35 .............................115
11.16.9 Function of input 36 .............................116
11.16.10 Function of input 37............................116
11.16.11 Function of input 38 ...........................116
11.16.12 Function of input 39 ...........................116