48
STS
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JZ
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F / IQ
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F I&O Manual Z83.20
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2016
IM101220
RD: APR 2019
RL: 20C
•
CHECK IF SPARK IS MISDIRECTED TO SIDE OF
IGNITER AND NOT ACROSS GAP
…
RESET IGNIT-
ER GAP & ALIGNMENT
•
CHECK THAT IGNITER IS GROUNDED
•
REMOVE AND INSPECT IGNITER AND LEAD CABLE
•
CHECK CERAMIC INSULATOR FOR DAMAGE
•
CHECK SPARK GAP SETTING IS
3/16”
(ADJUST BY
MOVING THE GROUND PRONG ONLY)
•
PERFORM IGNITION LEAD TEST
•
GOOD SPARK RESULTS .....REPLACE IGNITER
•
NO SPARK / OR WEAK.....REPLACE CONTROL
SPARK AT IGNITER / SENSOR
CONTINUED
YES
NO
MAIN BURNER LIGHTS
NO
YES
YES
24V TO GAS VALVE
-
RED LIGHT IS ON
NO
•
CHECK OUTPUT VOLTAGE FROM CONTROL TER-
MINALS TO GAS VALVE.....IF NO VOLTAGE RE-
PLACE CONTROL
•
CHECK ELECTRICAL WIRING, AND VOLTAGE BE-
TWEEN IGNITION CONTROL AND GAS VALVE.
•
IF OK, REPLACE GAS VALVE
•
24V IS PRESENT TO VALVE BUT NO RED LIGHT,
REPLACE RED LIGHT
•
CHECK GAS SUPPLY TO VALVE (MIMIMUM
5”
N.G.
or
11”
L.P.)
•
IF INSUFFICIENT REMEDY GAS SUPPLY
•
CHECK MANIFOLD PRESSURE
(3.5”
N.G. or
10”
L.P.)
•
IF NO MANIFOLD PRESSURE, REPLACE
GAS VALVE
•
IF INSUFFICIENT ADJUST MANIFOLD PRES-
SURE
•
SUFFICIENT MANIFOLD PRESSURE, BUT STILL NO
FLAME
•
REMOVE BURNER CUP AND INSPECT FOR
DAMAGE
•
REMOVE ORIFICE & CHECK FOR BLOCK-
AGE
MAIN BURNER LIGHTS, BUT SHUTS
OFF IMMEDIATELY
NO
•
CHECK THAT TUBE STATIC PRESSURE AT
BLOCKED FLUE SWITCH IS BELOW THE SWITCH
SETTING
•
CHECK FOR BLOCKAGE IN TUBE / VENT SYSTEM
•
CONFIRM VENT AND TOTAL SYSTEM LENGTHS
ARE WITHIN SPECIFICATIONS
•
CONFIRM CORRECT TURBULATOR SIZE & PLACE-
MENT
•
IF SWITCH OPENS BELOW SET POINT, REPLACE
SWITCH
YES
