Vermont Casting DVR33 - Manual (Page 30)

30
Vermont Castings, Majestic Products: DVR33
10004920
SIT 822 Valve with a Honeywell Electronic Igniter
NOTE: Remove glass before servicing.
START
TURN GAS SUPPLY OFF
TURN ON/OFF SWITCH
TO CALL FOR HEAT
POWER TO MODULE
(24V NORMAL)
APRK ACROSS
IGNITOR SENSOR GAP
YES
YES
YES
TURN GAS ON
PILOT BURNER LIGHTS?
SPARK STOPS WHEN
PILOT IS LIT?
MAIN BURNER LIGHTS?
SYSTEM RUNS UNTIL
ON/OFF SWITCH IS IN
"OFF" POSITION
TROUBLESHOOTING
ENDS
YES
YES
YES
NO
NO
NO
NO
NO
NO
CHECK: LINE VOLTAGE (120VAC)
LOW VOLTAGE TRANSFORMER
(19.5 minimum VAC)
ON/OFF SWITCH
WIRING CONNECTIONS
UNPLUG IGNITION LEAD
AND CHECK SPARK
AT MODULE
(24VAC normal)
SPARK OK?
REPLACE MODULE
CHECK IGNITION CABLE GROUND WIRING, CERAMIC INSULATOR
AND GAP. CORRECT AS NECESSARY
CHECK BOOT OF IGNITION CABLE FOR SIGNS OF MELING OR
BUCKLING. TAKE PROTECTIVE ACTION TO SHIELD
CABLE AND BOOT FROM EXCESSIVE TEMPERATURES.
CHECK THAT ALL MANUAL GAS VALVES ARE OPEN, SUPPLY TUBING
AND PRESSURES ARE GOOD, AND PILOT BURNER ORIFICE
IS NOT BLOCKED.
CHECK ELECTRICAL CONNECTIONS BETWEEN MODULE AND
PILOT OEPRATOR ON GAS CONTROL.
CHECK FOR 24VAC ACROSS PV-MVPV TERMIANLS ON MODULE IF
VOLTAGE IS OKAY, REPLACE GAS CONTROL IF NOT, REPLACE
MODULE.
NOTE: IF S8600B GOES INTO LOCKOUT, RESET SYSTEM.
CHECK CONTINUITY OF IGNITION CABLE AND GROUND WIRE.
CLEAN FLAME ROD.
CHECK ELECTRICAL CONNECTIONS BETWEEN FLAME ROAD & MODULE.
CHECK FOR CRACKED CERAMIC FLAME ROD INSULATOR.
CHECK FOR CRACKED CERAMIC FLAME ROD INSULATOR.
CHECK THAT PILOT FLAME COVERS FLAME ROD AND IS STEADY BLUE
ADJUST PILOT FLAME.
IF PROBLEM PERSISTS, REPLACE MODULE.
CHECK FOR 24VAC ACROSS MV-MVPV TERMINALS IF NO
VOLTAGE, REPLACE MODULE.
CHECK ELECTRICAL CONNECTIONS BETWEEN MODULE AND GAS
CONTROL. IF OKAY, REPLACE GAS CONTROL, OR GAS CONTROL
OPERATOR.
NOTE: IF S8600B GOES INTO LOCKOUT, RESET SYSTEM.
CHECK FOR CONTINUITY OF IGNITION CABLE AND GROUND WIRE.
NOTE: IF GROUND IS POOR OR ERRATIC, SHUTDOWN MAY OCCUR
OCCASIONALLY EVEN THOUGH OPERATION IS NORMAL AT THE TIME
OF CHECKOUT.
CHECK THAT THE PILOT FLAME COVERS FLAME ROAD AND IS STEADY
AND BLUE.
IF CHECKS ARE OKAY, REPLACE MODULE
NO
YES
Troubleshooting the Gas Control System