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Chapter 4. Explanation of Operation
z
Operation when there is a false flame before start input (Non-recycling gas-fired combustion)
Input
AUR890 operation
Sequence
codes
Operation of external devices
Power ON
When approximately 8 seconds have passed after the power has been
turned on, the 7-segment LED display on the front panel of the AUR890
shows the sequence code [- -].
Because there was a false flame signal, the FLAME LED (green) on the
front panel of the AUR890 lights up.
- -
Burner
operation
switch ON
- -
When the burner operation switch is turned
on, the blower starts to operate, and if the
limit and interlock conditions are normal, a
prepurge is done. After the prepurge, the
prepurge completion signal is turned ON.
Blower: operating
Controller
ON
If there is a false flame signal before the controller turns ON, after the
prepurge completion signal and then the external controller turn ON, a
false flame check is executed during the start check.
P
1
If a false flame signal lasts for 15 seconds or longer, the AUR890 will be
locked out, and relay K6 and the alarm output turn ON.
Also, the ALARM LED (red) on the front panel of the AUR890 lights up.
P
1
/
E
1
Alarm output : ON
––
P1
––
Stop
Star
t check
Lockout
P1/E1
AUR890
Prepurge time
(external circuit)
15 s
Approximately 8 s
[Input]
Power supply
[7-segment display]
Limit, Interlock
[Output]
Ignition transformer
Burner operation switch
Blower
Controller
Flame signal
RESET switch
[LED]
FLAME LED (Green)
Alarm output
Pilot valve
Main valve
ALARM LED (Red)
Содержание 81447514-001
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