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Chapter 4. How This Device Operates
z
False flame
If the start input turns ON while the flame signal is detected, the device transitions
to false flame detection status (PE). The device shifts out of false flame detection
status (PE) if the flame signal or the start input turns OFF.
PE PF
Start input
Flame signal
Flame output
(with start check)
Flame output
Flame relay N.C. output
Input
Display
Output
7-segment display
Start ONFlame detection No ame detected
Operation Operation of this device SHUT
LED
FL
LED
7-seg.
Start input OFF All relays are OFF.
- -
Flame signal input If a flame signal is detected, relays K7 and K8 turn ON.
z
- -
Start input ON Flame monitoring starts (false flame detected).
z
PE
Flame signal OFF Relays K7 and K8 turn OFF and the device continues monitoring the flame.
PF
z
: Lit, : Off, : Blinks
PE
Start input
Flame signal
Flame output
(with start check)
Flame output
Flame relay N.C. output
Input
Display
Output
7-segment display
Start ONFlame detection Start OFF No ame detected
Operation Operation of this device SHUT
LED
FL
LED
7-seg.
Start input OFF All relays are OFF.
- -
Flame signal input If a flame signal is detected, relays K7 and K8 turn ON.
z
- -
Start input ON Flame monitoring starts (false flame detected).
z
PE
Start input OFF The device transitions to controlled shut down status, and only relays K7
and K8 are ON.
z
- -
Flame signal OFF Relays K7 and K8 turn OFF.
- -
z
: Lit, : Off, : Blinks
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