Field Controls WML-C - Manual (Page 24)

30318 R4 9/9/2005
24
IDLE STATE
THERMOSTAT CALLS FOR HEAT
SAFETY CHECK FOR FLAME (5 SEC.)
BURNER MOTOR & IGNITOR START
SOLENOID VALVE OPENS
TRIAL FOR IGNITION
10 SEC.
BURNER FLAME MONITORED
CARRYOVER STATE
• Provides continuous spark
• LED diagnostic light ON
• Start Carryover Timer
CARRYOVER TIMER EXPIRES
RUN STATE
• Igniter turns off.
THERMOSTAT SATISFIED
R7184 SHUTS OFF:
• Burner Motor
• Solenoid Valve
• LED Diagnostic Light
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 Igniter
• Shuts off Burner Motor
• Slow Flashes LED
diagnostic light
RECYCLE TIMER EXPIRES
(60 SECONDS
FLAME LOST
SAFETY CHECK FOR FLAME (5 SEC.)
NO FLAME
FLAME
SAFETY CHECK FOR FLAME (5 SEC.)
NO FLAME
FLAME
30 SEC.