Nordyne O4LD-091A-12-RA Installation, Operation And Maintenance Manual page 18

IDLE STATE
A
THERMOSTAT CALLS FOR HEAT OIL PRIMARY
CONTROL
v SEQUENCE OF
SAFETY CHECK FOR FLAME (5 SEC.) REMAINS IN IDLE STATE OPERATION
A
NO FLAME 4
BURNER MOTOR & IGNITOR START
FLAME
10 SEC.
v
SAFETY CHECK FOR FLAME (5 SEC.)
NO FLAME v
FLAME
SOLENOID VALVE OPENS LOCKOUT STATE
Y
TRIAL FOR IGNITION Vv
OIL PRIMARY CONTROL:
¥ e Shuts off burner motor
BURNER FLAME MONITORED a ¢ Shuts off igniter
e Shuts off Solenoid Valve
NO FLAME e Fast Flashes LED Diagnostic
FLAME
'
Light
CARRYOVER STATE
e Provides continuous spark
e LED diagnostic light ON
e §=© Start Carryover Timer TOEXI] LOCKOUT
FLAME LOST PRESS RESET
FLAME
v
CARRYOVER TIMER EXPIRES
FLAME LOST
FLAME 1
RUN STATE ¥v
* Igniter turns T FLAME LOST RECYCLE TIMER STARTS
THERMOSTAT SATISFIED
y
y OIL PRIMARY CONTROL:
OIL PRIMARY CONTROL e Shuts off Solenoid Valve
SHUTS OFF: e Shuts off Igniter
e Burner Motor e =©Shuts off Burner Motor
e Solenoid Valve e Slow Flashes LED
diagnostic light
30 SEC.
v
SAFETY CHECK FOR FLAME (5 SEC.) y
RECYCLE TIMER EXPIRES
NO FLAME (60 SECONDS
FLAME
RETURNS TO IDLE STATE