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29733 R2 06/01/2003
26
IDLE STATE
THERMOSTAT CALLS FOR HEAT
SAFETY CHECK FOR FLAME (5 SEC.)
BURNER MOTOR & IGNITOR START
SOLENOID VALVE OPENS
TRIAL FOR IGNITION
15 SEC.
BURNER FLAME MONITORED
CARRYOVER STATE
· Provides continuous spark
· LED diagnostic light ON
· Start Carr
y
over Time
r
CARRYOVER TIMER EXPIRES
RUN STATE
· I
g
nitor turns off.
THERMOSTAT SATISFIED
R7184 SHUTS OFF:
· Burner Motor
· Solenoid Valve
· LED Dia
g
nostic Li
g
ht
RETURNS TO IDLE STATE
FLAME
FLAME
FLAME
FLAME
NO FLAME
NO FLAME
FLAME LOST
FLAME LOST
REMAINS IN IDLE STATE
R7184
SEQUENCE of
OPERATION
LOCKOUT STATE
R7184:
· Shuts off burner motor
· Shuts off igniter
· Shuts off Solenoid Valve
· Fast Flashes LED Diagnostic
Light
TO EXIT LOCKOUT
PRESS RESET
RECYCLE TIMER STARTS
R7184:
· Shuts off Solenoid Valve
· Shuts off Ignitor
· Shuts off Burner Motor
· Slow Flashes LED
diagnostic light
RECYCLE TIMER EXPIRES
(60 SECONDS
FLAME LOST