Operator`s manual

60
Theory Of Operation;
Start the drying cycle. When the gas
burner ignites within the chosen trial for
ignition time (6-seconds), the flame
sensor detects gas burner flame and
signals the Direct Spark Ignition (DSI)
module to keep the gas valve open...as
long as there is a call for heat. The
DSI module will “LOCKOUT” if the
gas burner flame is not sensed at the
end of the trial for ignition period. The
trial for ignition period will be repeated
for a total of three (3) retries/trials (the
initial try and two [2] more retries/trials).
If the flame is not sensed at the end of
the third retry/trial (inter-purge period
of 30-seconds) the DSI module will
“LOCKOUT” (L.E.D. [light emitting
diode] flashes).
A steady L.E.D. (light emitting diode)
indicator indicates normal operation.
No L.E.D. (light emitting diode)
indicator indicates a power or an
internal failure has occurred.
b. For models with Johnson Controls DSI (Direct Spark Ignition) Module (G760)