Azbil AUR890 Series, Руководство пользователя

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Chapter 4. Explanation of Operation
WARNING
Do not connect the solenoid valve to the high potential side (L1). If it is connected to L1 and a
ground fault occurs, current can leak to the solenoid valve and open it, allowing fuel to flow out,
regardless of the status of the burner controller.
z
Operation when an ignition failure occurs (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 [- -].
- -
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
pre-purge is done. After the pre-purge, the
pre-purge completion signal is turned ON.
Blower: operating
External
controller
ON
If the pre-purge completion signal is ON and the external controller is
ON, the internal circuits are checked during the start check.
P 1
Afterward a false flame check is conducted during the ignition wait
time.
P3
If the status is normal, the lockout time begins, relays K1, K2, K3 and K5
turn ON, the ignition transformer starts, the pilot valve begins to open,
and external timer TM1 turns ON.
P4
Ignition transformer : start
Pilot valve : open
(TM1 starts)
When the time set for TM1 has passed after the start of ignition
transformer operation, TM1's contacts turn off, the ignition transformer
ceases operation, and the pilot valve opens.
P4
Ignition transformer : stop
Pilot valve : closed
Alarm output : OFF
(TM1's contacts : OFF)
If the flame sensor does not detect a flame within the lockout time,
relays K1, K2, K3 and K5 turn OFF, relay K6 turns ON, and the alarm
output turns ON.
The ALARM LED (red) on the front panel of the AUR890 lights up.
P4
/
E6
Ignition transformer : stop
Pilot valve : closed
Alarm output : ON
(TM1 stop)
Burner
operation
switch OFF
P4
/
E6
Blower : stop
Reset
Switch ON
Relay K6 turns OFF to turn OFF the alarm output.
The ALARM LED (red) on the front panel of the AUR890 turns off.
- - Alarm output : OFF
–– P1 –– ––
Stop Star
t check
P3
Ignition standb
y
P4
Lock
-out timing
P4/E6 P4/E6
Lock
-out
Stop
AUR890
Pre-purge time
(external circuit)
Start check + Ignition standby time
Approximately 3 s
Approximately 8 s
Lock-out timing time 15 s
TM1 on delay time
Reset time
1 s or longer
[Input]
Power supply
[7-segment display]
Limit, Interlock
[Output]
Ignition transformer
Burner operation switch
Blower
Controller
Combustion signal
Reset switch
[LED]
FLAME LED (Green)
Warning output
Pilot valve
Main valve
ALARM LED (Red)