Bcu 580 Program Sequence - Honeywell Krom Schroder BCU 580 Technical Information

Function

3 .2 BCU 580 program sequence

Parameters 48 and 49 = 0: High/Low control during op-
eration, cooling in standby
Example of application, see page 11 (Two-stage-
controlled main burner with permanent pilot burner)
In the event of fault signal: reset
00
Start-up position/standby
Flame simulation check
PO External actuation of the air valve for purging
A0 External actuation of the air valve for cooling
Pilot burner start-up with ϑ1 signal
H1
Wait until the running time has elapsed (P42)
02 Safety time 1 t
valves V1 and V4 open
max. 3 start-up attempts
BCU 580 · Edition 11.15l
Switch on BCU 580
▼
▼
Safety interlocks
▼
▼
▼
▼
▼
▼
running,
SA1
ignition in process,
▼
If no flame detected:
or fault lock-out
▼
03 Flame proving period 1 t
In the event of flame failure:
04 Pilot burner operation signalling contact closes
In the event of flame failure:
restart or fault lock-out
Main burner start-up with ϑ2 signal
05
Wait until the running time has elapsed (P42)
06 Safety time 2 t
st
valves for 1
If no flame detected:
max. 3 start-up attempts
07 Flame proving period 2 t
In the event of flame failure: fault lock-out
running (P95)
FS1
▼
fault lock-out
▼
▼
▼
▼
▼
running,
SA2
gas stage (main burner) open.
▼
or fault lock-out
▼
running (P97)
FS2
▼
▼
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