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CONDITION
DAMPER OPENS NO POWER
TO IID MODULE
PILOT LIGHTS, SPARKS
CONTINUOUSLY
HEATER WILL NOT IGNITE
WEEPING TEMPERATURE
AND
PRESSURE RELIEF VALVE
LARGE VOLUME WATER
RELIEF FROM T&P VALVE
PREMATURE TANK
LEAKAGE
DAMPER WILL NOT OPEN
NO SPARK AT PILOT -
DAMPER FULLY OPEN
Technical Training Department
Ashland City, TN ©2003
SBD TANK TYPE HEATERS
SERVICE HANDBOOK
GENERAL SERVICE CHART
CAUSE
. DAMPER NOT FULLY OPEN
. DEFECTIVE PROTECTOR
SWITCH
PILOT FLAME NOT PROVING
NOT PROVING PILOT
FLAME EXISTANCE
PILOT GAS NOT COMPLETELY
INTERRUPTED AT END OF
HEATING CYCLE
. THERMAL EXPANSION
. FAULTY VALVE
. EXCESSIVE WATER
TEMPERATURE
. FAULTY RELIEF VALVE
CONDENSATION
CONTAMINATED AIR
WATER HAMMER
THERMAL EXPANSION
DEPLETED ANODES
BINDING SHAFT
DAMPER MOTOR
DAMPER ASSEMBLY
IID MODULE
SPARK CABLE
.EFFIKAL – REPLACE DAMPER CONTROL
ASSEMBLY
. REPLACE DAMPER
. REPLACE PC BOARD
SEE FLAME RECTIFICATION - STEP 16
INTERRUPT 120 VAC POWER
. CHECK GROUND WIRE
ATTACHMENT
. CLEAN OR REPLACE PILOT
ASSEMBLY
. CHECK SUPPLY GAS PRESSURE
. REPLACE GAS VALVE
ADD THERMAL EXPANSION TANK
REPLACE RELIEF VALVE
. CHECK WIRING
. REPLACE DUAL CONTROLLER
REPLACE RELIEF VALVE
. INCREASE STORED WATER
TEMPERATURE AND CONFIRM
PROPERLY SIZED APPLICATION
. REMOVE CONTAMINANTS.
. SUPPLY CLEAN COMBUSTION
AIR.
. ADD WATER HAMMER
ARRESTOR.
. REDUCE WATER PRESSURE.
. REMOVE UNNECESSARY CHECK
VALVES.
ADD THERMAL EXPANSION TANK.
SCHEDULE ANODE CHECKS -
REPLACE AS NEEDED.
SUPPORT VENTING
EFFIKAL-REPLACE DAMPER CONTROL
ASSEMBLY
SEE STEP 10A
Services Switch may bypass problem until
replacement part is received. (EFFIKAL –
REPLACE DAMPER CONTROL ASSEMBLY
REPLACE IID STEP 12
REPLACE CABLE STEP 13
41
SOLUTION
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