16
330º F (166º C) Thermostat
MAN3484
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
(HV) 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 Manual Reset 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 [166º C]). The hi-limit must be manually reset once
the device tripped.
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) Module
Johnson (DSI) Control Module
P/N 128935 ADC (DSI) Control Module
P/N 128973