2. Normal Operation
(1)
(2)
(3)
(4)
(5)
3. Ignition Failure (Misfire)
4.
If the flame detector does not detect any flame during the
ignition trial (within 4 seconds), the ignition operation
stops and the pilot valve is set to OFF.
Simultaneously, the Combustion/Alarm indicator LED
blinks. Then lockout occurs after the lockout timing.
When lockout occurs, an alarm is issued.
In this case, blinking of the indicator LED and the alarm
continue until the system is reset.
For restarting the system, press the reset button to reset
the system.
When the post-ignition is complete, the
ignition transformer operation stops and the
main valve is set to ON simultaneously.
- 6 -
Ignition Failure
If a flame failure occurs during normal
combustion, the pilot valve and the main valve
will be set to OFF when the flame response time
has expired. Simultaneously, the
Combustion/Alarm indicator LED blinks. Then
lockout occurs after the lockout timing.
The subsequent operation is as explained in
Ignition Failure in the above Item 3.
When the prepurge is complete, the ignition
transformer and the pilot valve are set to ON
simultaneously, and the Combustion/Alarm
indicator LED illuminates.
The state becomes post-ignition when a flame
is detected during the ignition trial (within 4
seconds).
The burner motor starts, the air pressure switch
is turned on, and the prepurge trial circuit
starts.
Flame Failure during Combustion
Flame Failure
When the temperature controller is turned on
after the power switch is turned on, the burner
motor starts.
Normal Operation
Fig C
Fig. A
Fig. B
Operation
Power switch ON
Flame failure
Lockout
Reset
Lockout
Ignition trial
Temperature controller ON
Post-ignition
Prepurge
Burner motor
Air pressure
switch
Ignition
transformer
Pilot valve
Main valve
Indicator
LED
Alarm
Time
Flame detection
Power switch OFF or
Temperature controller
Power switch ON
Ignition trial
Temperature controller
Prepurge
Lockout timing
Go to normal
operation.
Refer to Fig. A.
Burner motor
Air pressure
switch
Pilot valve
Main valve
Indicator
LED
Alarm
Time
Ignition
transformer
Fig. B
Shutoff
Burner motor
Lockout timing
Air pressure
switch
Ignition
transformer
Pilot valve
Main valve
Indicator
LED
Alarm
Time
(Change to temperature controller ON)
Reset
Go to normal
operation.
Refer to Fig. A.
(Change to temperature controller ON)
Reset
Flame response
