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SBD TANK TYPE HEATERS
SERVICE HANDBOOK
Technical Training Department
Ashland City, TN ©2003
41
GENERAL SERVICE CHART
NOITULOS ESUAC NOITIDNOC
DAMPER OPENS NO POWER
TO IID MODULE . DAMPER NOT FULLY OPEN
. DEFECTIVE PROTECTOR
SWITCH
.EFFIKAL – REPLACE DAMPER CONTROL
ASSEMBLY
. REPLACE DAMPER
. REPLACE PC BOARD
PILOT LIGHTS, SPARKS
CONTINUOUSLY
PILOT FLAME NOT PROVING SEE FLAME RECTIFICATION - STEP 16
HEATER WILL NOT IGNITE
NOT PROVING PILOT
FLAME EXISTANCE
INTERRUPT 120 VAC POWER
. CHECK GROUND WIRE
ATTACHMENT
. CLEAN OR REPLACE PILOT
ASSEMBLY
YLETELPMOC TON SAG TOLIP
INTERRUPTED AT END OF
HEATING CYCLE
. CHECK SUPPLY GAS PRESSURE
. REPLACE GAS VALVE
. THERMAL EXPANSION ADD THERMAL EXPANSION TANK
WEEPING TEMPERATURE
AND
PRESSURE RELIEF VALVE
EVLAV FEILER ECALPER EVLAV YTLUAF .
. EXCESSIVE WATER
TEMPERATURE
. CHECK WIRING
. REPLACE DUAL CONTROLLER
LARGE VOLUME WATER
RELIEF FROM T&P VALVE
. FAULTY RELIEF VALVE REPLACE RELIEF VALVE
PREMATURE TANK
LEAKAGE
CONDENSATION . INCREASE STORED WATER
TEMPERATURE AND CONFIRM
PROPERLY SIZED APPLICATION
RIA DETANIMATNOC . REMOVE CONTAMINANTS.
. SUPPLY CLEAN COMBUSTION
AIR.
REMMAH RETAW . ADD WATER HAMMER
ARRESTOR.
. REDUCE WATER PRESSURE.
. REMOVE UNNECESSARY CHECK
VALVES.
NOISNAPXE LAMREHT ADD THERMAL EXPANSION TANK.
- SKCEHC EDONA ELUDEHCS SEDONA DETELPED
REPLACE AS NEEDED.
GNITNEV TROPPUS TFAHS GNIDNIB NEPO TON LLIW REPMAD
LORTNOC REPMAD ECALPER-LAKIFFE ROTOM REPMAD
ASSEMBLY
NO SPARK AT PILOT -
DAMPER FULLY OPEN
DAMPER ASSEMBLY SEE STEP 10A
Services Switch may bypass problem until
replacement part is received. (EFFIKAL –
REPLACE DAMPER CONTROL ASSEMBLY
21 PETS DII ECALPER ELUDOM DII
31 PETS ELBAC ECALPER ELBAC KRAPS