American Dryer Corp. AD-540, Процедура обслуживания

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C. G-760 DIRECT SPARK IGNITION (DSI) FLOWCHART
1. Normal Operation (Summary)
On a call for heat by the dryers’ controls, 24 VAC is applied to the DSI module at which time the modules’
light emitting diode (L.E.D.) indicator will light “GREEN” indicating that power has been established to the
module. Almost immediately (up to approximately 1.5-seconds [prepurge]), the valve opens and the spark
burst will be evident (on) for approximately 8-seconds. The burner flame
should now be established/
confirmed.
If at this time the flame has not been established/confirmed, the DSI module will try two (2) more times,
then if still no ignition the modules’ indicator will blink continuously. To reset or cancel the “LOCKOUT”
condition, open and close the main door and restart the dryer.
Once the burner flame is established/confirmed, the DSI module L.E.D. indicator will stay “GREEN” and
the burner system will continue through a normal heating cycle, where the DSI system will cycle on and off
as required by the dryer’s controls.
During the normal heating cycle, should a flameout occur (i.e. severe air turbulence forces the flame away
from the ignitor assembly flame-probe), the DSI module will shut the gas valve off and try to reestablish the
burner flame after 30-seconds.
THERMOSTAT CALLS FOR HEAT
(24 Volts applied to control)
PREPURGE
* SECONDS
TRIAL TIME FOR IGNITION
* SECONDS
FLAME SENSED
AT MAIN BURNER?
NO YES
POWER REMOVED
VALVES, SPARK
SWITCHED OFF
INTERPURGE
* SECONDS
LOCKOUT
(Until power is removed
from control)
SPARK SWITCHED OFF
HAS THIRD TRIAL
BEEN COMPLETED?
NO YES
RUN-MAIN BURNER
OPERATION
(Control monitors
main burner flame)
THERMOSTAT SATISFIED
(Power removed from control
and valves)
* See control label for actual times.
3-TRIAL MODEL?
YES NO