ADC AD-410 service manual VAC Direct Spark Ignition DSI Module

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.

24 VAC

Direct Spark Ignition (DSI) Module

b.The Ignitor and 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 (Direct Spark Ignition) Module as to whether the burner flame is evident (on).

c.The Burner 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). For dryers manufactured as of May 26, 1998, the hi-limit must be manually reset once the device trips.

d.The Sail Switch Verification Assembly is located on the burner, downstream of the flame tubes. Its function is to detect whether or not there is sufficient air flow through the dryer. If the Sail Switch is not in the open position prior to a drying cycle, the blower circuit will not be activated.

2 8

MAN3485

Ignitor/Flame Probe Assembly

MAN3484

330º F Thermostat

Sail Switch Verification Assembly