Nordyne O4HD-091A-14-FA-DV Installation, Operation And Maintenance Manual page 22

IDLE STATE
THERMOSTAT CALLS FOR HEAT
4,
F
OIL PRIMARY
CONTROL
SAFETYCHECKFORFLAME(5SEC.) I l
NO FLAME
BURNER MOTOR & IGNITOR START I
10 SEC.
SAFETY CHECK FOR FLAME (5 SEC.) I
NO FLAME
REMAINS IN IDLE STATE
FLAME
1
SEQUENCE of
OPERATION
SOLENOID VALVE OPENS
TRIAL FOR IGNITION
I
4,
BURNER FLAME MONITORED
FLAME
CARRYOVER STATE
• Provides continuous spark
• LED diagnostic light ON
• Start Carryover Timer
FLAME
FLAME
NO FLAME
FLAME LOST
,L
I OCKOUT STATE
l
OIL PRIMARY CONTROL:
Shuts off burner motor
Shuts off igniter
Shuts off Solenoid Valve
Fast Flashes LED Diagnostic
Light
CARRYOVER TIMER EXPIRES
FLAME
RUN STATE
• Igniter turns off.
FLAME LOST I
FLAME LOST
THERMOSTAT SATISFIED
4,
OIL PRIMARY CONTROL
SHUTS OFF:
• Burner Motor
• Solenoid Valve
30 SEC.
I
SAFETY CHECK FOR FLAME (5 SEC.) I
I
NO FLAME i
RETURNS TO IDLE STATE
FLAME
RECYCLE TIMER STARTS
OIL PRIMARY CONTROL:
Shuts off Solenoid Valve
Shuts off Igniter
Shuts off Burner Motor
Slow Flashes LED
diagnostic light
RECYCLE TIMER EXPIRES
(60 SECONDS
22