Honeywell SmartValve SV9510 Quick Start Manual page 13

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SV9510/SV9520 DIRECT HOT SURFACE IGNITION SmartValve™ SYSTEM CONTROL
SEQUENCE OF OPERATION WITH ST9160 ELECTRONIC FAN TIMER OR 208907 TERMINAL BOARD
APPLY POWER TO APPLIANCE
THERMOSTAT CALLS FOR HEAT
AIR PROVING SWITCH PROVED
OPEN?
COMBUSTION AIR BLOWER ON
AIR PROVING SWITCH PROVED
CLOSED WITHIN 30 SECONDS?
PREPURGE
HOT SURFACE IGNITER ON
FOR WARM-UP TIME
MAIN VALVE OPENS
HOT SURFACE IGNITER OFF
MAIN BURNER LIGHTS AND IS
SENSED DURING TRIAL
FOR IGNITION?
CIRCULATING AIR FAN ON
AFTER DELAY
FLAME SENSE LOST?
THERMOSTAT CALL FOR
HEAT ENDS
MAIN VALVE CLOSES
COMBUSTION AIR BLOWER OFF
AFTER POST PURGE
CIRCULATING AIR FAN OFF
AFTER DELAY
WAIT FOR NEXT CALL FOR HEAT
1
NO
WAIT FOR AIR PROVING
SWITCH TO OPEN
YES
FIVE-MINUTE WAIT PERIOD
NO
COMBUSTION AIR BLOWER OFF
YES
30 SECOND
BETWEEN TRIAL PURGE
NO
YES
FAILED TRIALS FOR IGNITION
LESS THAN FOUR DURING
2
THIS IGNITION SEQUENCE?
YES
MAIN VALVE CLOSES
NO
FLAME SENSE LOST MORE
THAN FIVE TIMES IN THIS CALL
FOR HEAT OR OTHER
ABNORMAL OPERATION?
1
2
2
3
Fig. 11. SV9510/SV9520 sequence of operation.
SV9510/SV9520 SMARTVALVE™ SYSTEM CONTROLS
MAIN VALVE CLOSES
YES
NO
NO
3
YES
WHEN SmartValve™ IS POWERED, LED WILL BE IN
"HEARTBEAT" MODE (BRIGHT-DIM-BRIGHT-DIM, ETC.).
THIS FUNCTION OCCURS ONLY WITH ST9160
CONNECTED TO SmartValve™ SYSTEM CONTROL.
SEE TROUBLESHOOTING SECTION FOR DETAILED INFORMATION.
13
1 HOUR AUTO LOCKOUT
RESET DELAY
CIRCULATING AIR FAN OFF
2
AFTER DELAY
COMBUSTION AIR BLOWER
OFF AFTER POST PURGE
M23474
69-2014