DIRECT SPARK

IGNITION OPERATION

FLOW CHART

The DSI module is powered by a 24 volts AC suppled by a step-down transformer in series with eight safety interlocks:

A. Timer switching device (1)

B. Main door and lint door switches (2) C. Sail switch (1)

D. Under basket and burner housing thermal safety switches (2) E . Variable thermostat (1)

F . Push to start switch (1)

THERMOSTAT

CALLS FOR HEAT

IGNITION CYCLE

BEGINS, GAS VALVE

O N

MAIN BURNER

N O

CONTROL LOC-OUT

FLAME DETECTED

 

 

RESET POWER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SPARK IGNITION

 

 

REQUIRES A

 

 

MANUAL RESET

OFF FLAME MONI-

 

 

 

 

(Opening/closing door,

TOR ON GAS VALVE

 

 

 

 

power switch ON/OFF)

O N

 

 

 

 

 

 

YES FLAME IS LOST DUE

TO POWER OUTAGE,

DOOR OPEN

N O

FLAME IS ON UNTIL

THERMOSTAT OR

TIMER IS SATISFIED

Page 25