Whirlpool IEL730C, Техническое образование

Страница: 20 / 66

2-2
n
Vesta Gas and Electric Slide-In Ranges
OPERATION
DIRECT SPARK IGNITION (DSI)
DSI 0VEN IGNITION AND MONITORING SYSTEM
Time (sec)
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
Valve open
Charge Cap
Spark
Flame Sense
The DSI monitoring system is used for the OVEN operation only. It performs a self test that checks to verify that the
gas distribution valve is electrically wired correctly. It also provides a Flame safety check that monitors the flame
in the oven anytime a flame is present.
The monitoring system is NOT required for the cooktop burners - that is an operator monitored system because
the operator turns the sparking ON and OFF as required.
Shown above is a chart that shows how the DSI system works. The chart is a 4 second time span showing the op-
eration of the oven system.
As the operator selects a bake operation by programming the Oven Control User Interface, the bake valve solenoid
(the blue line) is open to provide gas to the oven burner. The spark capacitor charges, shown by the green line and
2 sparks will occur (red “spark” circles) if the burner lights, the flame sensing check (the yellow line) will verify
that a flame is present and the oven lighting sequence is stopped.
IMPORANT! IF the flame check fails and a flame is not detected, the ignition system will shut down for 40 seconds
to dissipate the gas that was released into the oven because the valve was open and releasing gas for the full 4
seconds.
After the 40 seconds shutdown, a second attempt to light the oven will automatically begin. The sparking will start
again for the full 4 seconds, just like the first attempt; again a flame sense check verifies a flame. If, again a flame
has not been established, the system will shut down for another 40 seconds to dissipate the gas that was released
into the oven.
At the end of 40 seconds one more attempt will automatically start. The oven will attempt to light again. If no
flame is established at this time, the system will go into LOCKOUT.
LOCKOUT can be cancelled by pressing the OFF/CANCEL keypad. No indication of a LOCKOUT will be shown on the
e lectronic oven control
.