Honeywell Krom Schroder PFU 780 - Page 3

PFU 780 · Edition 02.12l 3
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= To be continued
6.2.2 Star electrodes ......................................50
6.3 Minimum combustion time.......................51
6.4 Safety interlocks (Limits) .........................51
6.5 Emergency stop ..................................52
6.5.1 In the event of fire or electric shock . . . . . . . . . . . . . . . . . 52
6.5.2 Via the safety interlocks (limits)..................... 52
6.6 Reset ..............................................52
6.6.1 Parallel reset......................................... 52
6.6.2 Permanent remote reset ............................ 52
6.6.3 Automatic remote reset (PLC) ...................... 52
6.6.4 Burner start ......................................... 52
6.6.5 Restart and start-up attempts ...................... 52
6.7 Fault message ....................................53
6.8 Protecting the pilot burner from overload ........53
6.9 Installation........................................53
6.10 Wiring............................................53
6.10.1 UVS sensor wiring..................................53
6.11 PFU switched off ................................53
6.12 Furnace control .................................54
6.13 Note on EC type-examination...................54
6.14 Mains switch ....................................54
6.15 Changing parameters ...........................54
7 Flame control .....................................55
7.1 With ionisation sensor ............................55
7.2 With UV sensor ....................................55
7.3 Via the temperature in high temperature
equipment ............................................55
8 Accessories...................................... 56
8.1 High-voltage cable ...............................56
8.2 BCSoft ............................................56
8.3 Stickers for labelling ..............................56
8.4 “Changed parameters” stickers ..................56
8.5 Radio interference suppressed electrode
adapters ..............................................57
8.6 Socket connectors ................................57
8.7 Module subrack ...................................57
8.8 Power supply PFP 700............................58
8.9 Relay module PFR 704 ...........................59
8.10 Field bus interface PFA 700.................... 60
8.11 Impulse system MPT 700 .......................61
9 Technical data ....................................62
9.1 Safety-specific characteristic values .............64
9.2 Operating controls................................65
10 Maintenance cycles ............................ 66
11 Legend ..........................................67
12 Glossary ........................................ 68
12.1 Waiting time
t
W
..............................68
12.2 Safety time on start-up t
SA
..................... 68
12.3 Ignition time t
Z
................................. 68
12.4 Flame simulation/Flame simulation delay
time t
LV
..........................................68
12.5 Safety time during operation t
SB
.............69
12.6 Flame signal .....................................69
12.7 Fault lock-out ....................................69
12.8 Safety interlocks (Limits) ........................69
12.9 Pilot gas valve V1 ................................69
12.10 Main gas valve V2 ..............................69
12.11 Continuous operation ..........................70
12.12 Air valve.........................................70
12.13 Diagnostic coverage DC .......................70
12.14 Mode of operation..............................70
12.15 Safe failure fraction SFF .......................70
12.16 Probability of dangerous failure PFH
D
........70
12.17 Mean time to dangerous failure MTTF
d
.......70
Feedback ...........................................71
Contact.............................................71