Honeywell krom schroder BCU 440 - Legend

BCU 440 · Edition 01.17 33
Legend
10 Legend
88
Display
88
Blinking display
Ready
Safety interlocks (Limits)
Burner start-up signal
Ignition transformer
Gas valve
Air valve
P
Purge
A
Ext. air valve control
Flame signal
Burner operating signal
Fault signal
Reset
Input signal
Output signal
Flame simulation check
t
W
Waiting time ≥ 2 s
t
SA
Safety time on start-up 3 s, 5 s or 10 s
t
SB
Safety time during operation < 1 s or < 2 s
t
Z
Ignition time 2 s, 3 s or 6 s
t
LV
Flame simulation delay time 25 s
Input/Output safety circuit