Kromschroder FCU 500 - Program Sequence; Fcu 500

FCU 500, FCU 505 · Edition 02.17 19
Function
3.2 Program sequence
3.2.1 FCU 500..F0
Example of application, see page 8 (ON/OFF rotary
impulse control)
Switch on the FCU
▼
In the event of fault signal: reset
▼
00
Start-up position/standby
▼
H0
Start-up with ϑ signal
▼
Switch-on delay time t
E
running (parameter 63)
Safety interlocks check
▼
01
Fan run-up time t
GV
running (parameter 30)
Pre-purge starts
▼
1
Air flow monitoring
▼
P1
Pre-purge time t
PV
running (parameter 34)
Tightness test (if equipped with TC)
▼
08
Gas enable via valves V1 and V2
Enable signal to burner control units for the burner start via the “safety
interlock” output
▼
Operation