Manuals / State Industries / Household Appliance / Electric Heater

State Industries SBD85 500 Troubleshooting Sbd Water Heaters, Step, Test The Transformer, Then

Models: SBD85 500 SBD71 120

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SBD TANK TYPE HEATERS

SERVICE HANDBOOK

TROUBLESHOOTING SBD WATER HEATERS

To troubleshoot a SBD water heater check that:

•120 VAC is supplied to the heater

•the tank is full of water

•gas is supplied to the unit

STEP 1

TEST THE TRANSFORMER

STEP 1 - TO TEST THE TRANSFORMER - Using a multimeter, test for 24 VAC between the secondary transformer terminals.

IF	THEN
The meter does not read 24 VAC:	• Check that the 120 VAC is supplied
	from the On/Off Switch – if not, replace
	switch.
	• Check that the 120 VAC is supplied
	from transformer.
The meter reads 24 VAC:	• Go to step 2.

Technical Training Department	19
Ashland City, TN ©2003

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State Industries SBD85 500, SBD71 120 manual Troubleshooting Sbd Water Heaters, Step, Test The Transformer, Then

Contents

Part Number STC-072 SERVICE HANDBOOKAlso includes Parts List SandBlasterSBD TANK TYPE HEATERS SERVICE HANDBOOK SBD HANDBOOKModel Breakdown SBD 85 500 P E A CGA D SBD TANK TYPE HEATERS SERVICE HANDBOOKINSTALLATION CLEARANCES FROM COMBUSTIBLESClearance to Combustibles Table MODELEXTERIOR CLEARANCE SBD TANK TYPE HEATERS SERVICE HANDBOOKAIR FOR COMBUSTION 10 CUBIC FEET OF AIR PER 1,000 BTUMinimum SBD TANK TYPE HEATERS SERVICE HANDBOOKSBD TANK TYPE HEATERS SERVICE HANDBOOK MAKE-UPAIRDIRECT COMMUNICATION 1 Square Inch Per 4,000 BTUH VERTICAL DUCTS HORIZONTAL DUCTSSBD TANK TYPE HEATERS SERVICE HANDBOOK MAKE-UPAIRSBD TANK TYPE HEATERS SERVICE HANDBOOK INSUFFICIENT MAKE-UPAIRBACKDRAFT SBD TANK TYPE HEATERS SERVICE HANDBOOK CONTAMINATED AIRAIR FOR COMBUSTION Flammable Items Supply Gas Manifold Pressure Tap Dirt Leg Manifold Gas PortGAS PRESSURE REQUIREMENTS Natural GasSee step 18 for SBD-500gas valve illustration SBD GAS VALVESBD TANK TYPE HEATERS SERVICE HANDBOOK VENTING Atmospheric, Single, and Multiple Heaters Combined VentsNine Rules for Good Vents SBD TANK TYPE HEATERS SERVICE HANDBOOKNine Rules for Good Vents continued SBD TANK TYPE HEATERS SERVICE HANDBOOKSBD TANK TYPE HEATERS SERVICE HANDBOOK Nine Rules for Good Vents continuedPOWER VENT KITS FOR SIDEWALL VENTING SBD TANK TYPE HEATERS SERVICE HANDBOOKSBD SEQUENCE OF OPERATION 1.Thermostat calls for heat7.Thermostat satisfies 3.Intermittent Ignition ControlSBD ELECTRICAL SEQUENCE 100 - 109 Series SBD TANK TYPE HEATERS SERVICE HANDBOOKSBD TANK TYPE HEATERS SERVICE HANDBOOK SBD ELECTRICAL SEQUENCE OF OPERATION115/60/12A TROUBLESHOOTING SBD WATER HEATERS STEPTEST THE TRANSFORMER THENHIGH LIMIT, LEFT TERMINAL TEST Ground 24VAC FM TransformerSBD TANK TYPE HEATERS SERVICE HANDBOOK STEPTemperature Reset ButtonJumper Wire After Push in Reset - 24 VAC is now presentDamper Closed Damper OpenINSPECT THE DAMPER CHECK THE PC BOARDService Switch PC BOARD MOTOR TESTMotor Lead SBD TANK TYPE HEATERS SERVICE HANDBOOKTHERMOSTAT TEST SBD TANK TYPE HEATERS SERVICE HANDBOOKSTEP THENService SwitchEFFIKAL DAMPER AdapterHARNESS CHART NORMAL OPERATIONTEST FOR 24VAC BETWEEN BLACK COMMON AND BROWN Heater HarnessNORMAL OPERATION continued STEP 8ATEST FOR 24VAC BETWEEN BLACK AND ORANGE STEP 8BTROUBLESHOOTING THE EFFIKAL DAMPER STEP 9ASBD TANK TYPE HEATERS SERVICE HANDBOOK ConditionTROUBLESHOOTING THE EFFIKAL DAMPER continued A1 IS CORRECT, CHECK SERVICE SWITCH POSITIONService Switch STEP 9BADJUST END SWITCH TO CAM CONTACT STEP 10ASTEP 10B TROUBLESHOOTING THE EFFIKAL DAMPER continuedWIRE HARNESS TEST SBD TANK TYPE HEATERS SERVICE HANDBOOKSTEP THENIID MODULE TEST SBD TANK TYPE HEATERS SERVICE HANDBOOKSTEP THENPower To Module May Be Interrupted To Reset PILOT SPARK TESTSBD TANK TYPE HEATERS SERVICE HANDBOOK STEPSTEP 14A PILOT VALVE - OHM TESTSBD TANK TYPE HEATERS SERVICE HANDBOOK THENSTEP 14B PILOT VALVE TEST - SBD 500 ONLYSBD TANK TYPE HEATERS SERVICE HANDBOOK THENMAIN BURNER TEST SBD TANK TYPE HEATERS SERVICE HANDBOOKSTEP THENFLAME RECTIFICATION STEP 16. FLAME RECTIFICATIONSBD TANK TYPE HEATERS SERVICE HANDBOOK STEPPilot is lit - Sparking has stopped SBD TANK TYPE HEATERS SERVICE HANDBOOKSTEP IID MODULE TESTSTEP 18A MAIN GAS VALVE CHECKSBD TANK TYPE HEATERS SERVICE HANDBOOK TH TRSTEP 18B MAIN GAS VALVE COIL CHECKSBD TANK TYPE HEATERS SERVICE HANDBOOK THENSBD TANK TYPE HEATERS GENERAL SERVICE CHARTSERVICE HANDBOOK SBD TANK TYPE HEATERS GENERAL QUESTIONS AND ANSWERSSERVICE HANDBOOK SBD MODELS 120 THRU 500A SERIES 110/111SERVICE HANDBOOK EFFIKAL DAMPER DRIVE ASSEMBLY GAS VALVESSBD TANK TYPE HEATERS SBD MODELS 120 THRU 500A continued SERIESSERVICE HANDBOOK Series SERVICE HANDBOOKCLEANOUT ASSEMBLY SBD MODELS 120 THRU 500A continued SERIESSERVICE HANDBOOK CLEANOUT ASSEMBLYSBD MODELS 120 THRU 500A continued SERIES SBD TANK TYPE HEATERSSERVICE HANDBOOK CLEANOUT ASSEMBLYSBD MODELS 120 THRU 500A continued SERIES SBD TANK TYPE HEATERSSERVICE HANDBOOK CLEANOUT ASSEMBLYSBD MODELS 120 THRU 500A continued SERIES SBD TANK TYPE HEATERSSERVICE HANDBOOK CLEANOUT ASSEMBLYSBD MODELS 120 THRU 500A continued SERIES SBD TANK TYPE HEATERSSERVICE HANDBOOK CLEANOUT ASSEMBLYSBD MODELS 120 THRU 500A continued SERIES SBD TANK TYPE HEATERSCOMPONENT PART INFORMATION SPECIFICATIONSNAME STATE PARTSBD SERVICE CHECKLIST V.WATER PIPING SERVICE HANDBOOKSBD TANK TYPE HEATERS COMMENTS SERVICE HANDBOOKAuthor Terry Mulder SBD TANK TYPE HEATERSState Water Heaters COMMERCIALThe Expert’s Choice Copyright 2006 State Industries, Inc