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330º F (166º C) Thermostat
Sail Switch Assembly
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.
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).
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.
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.
Ignitor/Flame-Probe Assembly
24 VAC Direct Spark Ignition (DSI) Modules
Johnson (DSI) Control Module
P/N 128935
ADC (DSI) Control Module
P/N 128973