American Dryer Corp ML-310 Phase 7 service manual VAC Direct Spark Ignition DSI Modules

24 VAC Direct Spark Ignition (DSI) Modules

a. The Direct Spark Ignition (DSI) module is a 24 VAC device designed to be the “controller” of the DSI system. When activated by the dryer controls, this module constantly monitors and controls the functions of the DSI system (i.e., spark activation, gas valve off and on, flame verification, etc.). Additionally, the DSI module has self-diagnostic capabilities.

Johnson (DSI) Control Module	ADC (DSI) Control Module
P/N 128935	P/N 128973

b.The Ignitor/Flame-Probe Assembly is located in the burner flame area and is used to ignite the gas by use of a high voltage spark (approximately 14,000 volts) and to provide feedback

information to the DSI module as to whether the burner flame is evident (on).

Ignitor/Flame-Probe Assembly

c.The Burner Manual Reset Hi-Limit Switch is a thermostat type switch located in the burner. Its function is to discontinue heat (flame) in the event of an over temperature situation (above

330º F [166º C]). For dryers manufactured, as of May 26, 1998, the hi-limit must be manually reset once the device trips.

330º F (166º C) Thermostat

d.The Sail Switch Assembly is located on the Burner Assembly, downstream of the flame tubes. Its function is to detect whether or not there is sufficient airflow through the dryer.

Sail Switch Assembly

1 8