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State Industries SBD71 120, SBD85 500 manual Sbd Electrical Sequence Of Operation, 115/60/12A

Models: SBD85 500 SBD71 120

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SBD TANK TYPE HEATERS

SERVICE HANDBOOK

SBD ELECTRICAL SEQUENCE OF OPERATION

115/60/12A

120 VAC to Junction Box

On / OFF Switch "ON"

24V Transformer

Tank Temperature

Calling for Heat

High Limit Closed

Thermostat Closed

Motor Opens

Damper

Cam On Damper Blade Closes Proving End Switch

IID Module

(24V) Receives Voltage

Tank Temperature

Satisfied

High Limit (ECO)

Closed

Motor Closes

Damper

Module (PV) Terminal Sends 24V to Pilot Coil

Module (Spark) Sends 10,000V Spark to Pilot

Pilot Ignites and Proves Flame

Spark Stops

Module (MV)

Terminal Sends 24V

To Main Gas Coil

Main Burner Heats Tank

Themostat Opens

Power to Damper

#2 Interrupted

Damper Motor Energized and Damper Closed

90 Second Trial /

5 Minute Delay Between

Trials - Continuously

Technical Training Department	18
Ashland City, TN ©2003

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State Industries SBD71 120 manual Sbd Electrical Sequence Of Operation, 115/60/12A, Sbd Tank Type Heaters Service Handbook

Contents

SandBlaster Part Number STC-072SERVICE HANDBOOK Also includes Parts ListSBD HANDBOOK SBD TANK TYPE HEATERS SERVICE HANDBOOKSBD TANK TYPE HEATERS SERVICE HANDBOOK Model Breakdown SBD 85 500 P E A CGA DMODEL INSTALLATIONCLEARANCES FROM COMBUSTIBLES Clearance to Combustibles TableSBD TANK TYPE HEATERS SERVICE HANDBOOK EXTERIOR CLEARANCESBD TANK TYPE HEATERS SERVICE HANDBOOK AIR FOR COMBUSTION10 CUBIC FEET OF AIR PER 1,000 BTU MinimumDIRECT COMMUNICATION 1 Square Inch Per 4,000 BTUH MAKE-UPAIRSBD TANK TYPE HEATERS SERVICE HANDBOOK MAKE-UPAIR VERTICAL DUCTSHORIZONTAL DUCTS SBD TANK TYPE HEATERS SERVICE HANDBOOKBACKDRAFT INSUFFICIENT MAKE-UPAIRSBD TANK TYPE HEATERS SERVICE HANDBOOK AIR FOR COMBUSTION Flammable Items CONTAMINATED AIRSBD TANK TYPE HEATERS SERVICE HANDBOOK Natural Gas Supply Gas Manifold Pressure Tap Dirt LegManifold Gas Port GAS PRESSURE REQUIREMENTSSBD TANK TYPE HEATERS SERVICE HANDBOOK SBD GAS VALVESee step 18 for SBD-500gas valve illustration SBD TANK TYPE HEATERS SERVICE HANDBOOK VENTING Atmospheric, Single, and Multiple HeatersCombined Vents Nine Rules for Good VentsSBD TANK TYPE HEATERS SERVICE HANDBOOK Nine Rules for Good Vents continuedNine Rules for Good Vents continued SBD TANK TYPE HEATERS SERVICE HANDBOOKSBD TANK TYPE HEATERS SERVICE HANDBOOK POWER VENT KITS FOR SIDEWALL VENTING3.Intermittent Ignition Control SBD SEQUENCE OF OPERATION1.Thermostat calls for heat 7.Thermostat satisfiesSBD TANK TYPE HEATERS SERVICE HANDBOOK SBD ELECTRICAL SEQUENCE 100 - 109 Series115/60/12A SBD ELECTRICAL SEQUENCE OF OPERATIONSBD TANK TYPE HEATERS SERVICE HANDBOOK THEN TROUBLESHOOTING SBD WATER HEATERSSTEP TEST THE TRANSFORMERSTEP HIGH LIMIT, LEFT TERMINAL TESTGround 24VAC FM Transformer SBD TANK TYPE HEATERS SERVICE HANDBOOKAfter Push in Reset - 24 VAC is now present TemperatureReset Button Jumper WireCHECK THE PC BOARD Damper ClosedDamper Open INSPECT THE DAMPERSBD TANK TYPE HEATERS SERVICE HANDBOOK Service SwitchPC BOARD MOTOR TEST Motor LeadTHEN THERMOSTAT TESTSBD TANK TYPE HEATERS SERVICE HANDBOOK STEPAdapter ServiceSwitch EFFIKAL DAMPERHeater Harness HARNESS CHARTNORMAL OPERATION TEST FOR 24VAC BETWEEN BLACK COMMON AND BROWNSTEP 8B NORMAL OPERATION continuedSTEP 8A TEST FOR 24VAC BETWEEN BLACK AND ORANGECondition TROUBLESHOOTING THE EFFIKAL DAMPERSTEP 9A SBD TANK TYPE HEATERS SERVICE HANDBOOKSTEP 9B TROUBLESHOOTING THE EFFIKAL DAMPER continuedA1 IS CORRECT, CHECK SERVICE SWITCH POSITION Service SwitchTROUBLESHOOTING THE EFFIKAL DAMPER continued ADJUST END SWITCH TO CAM CONTACTSTEP 10A STEP 10BTHEN WIRE HARNESS TESTSBD TANK TYPE HEATERS SERVICE HANDBOOK STEPTHEN IID MODULE TESTSBD TANK TYPE HEATERS SERVICE HANDBOOK STEPSTEP Power To Module May Be Interrupted To ResetPILOT SPARK TEST SBD TANK TYPE HEATERS SERVICE HANDBOOKTHEN STEP 14APILOT VALVE - OHM TEST SBD TANK TYPE HEATERS SERVICE HANDBOOKTHEN STEP 14BPILOT VALVE TEST - SBD 500 ONLY SBD TANK TYPE HEATERS SERVICE HANDBOOKTHEN MAIN BURNER TESTSBD TANK TYPE HEATERS SERVICE HANDBOOK STEPSTEP FLAME RECTIFICATIONSTEP 16. FLAME RECTIFICATION SBD TANK TYPE HEATERS SERVICE HANDBOOKIID MODULE TEST Pilot is lit - Sparking has stoppedSBD TANK TYPE HEATERS SERVICE HANDBOOK STEPTH TR STEP 18AMAIN GAS VALVE CHECK SBD TANK TYPE HEATERS SERVICE HANDBOOKTHEN STEP 18BMAIN GAS VALVE COIL CHECK SBD TANK TYPE HEATERS SERVICE HANDBOOKSERVICE HANDBOOK GENERAL SERVICE CHARTSBD TANK TYPE HEATERS SERVICE HANDBOOK GENERAL QUESTIONS AND ANSWERSSBD TANK TYPE HEATERS EFFIKAL DAMPER DRIVE ASSEMBLY GAS VALVES SBD MODELS 120 THRU 500ASERIES 110/111 SERVICE HANDBOOKSERVICE HANDBOOK SBD MODELS 120 THRU 500A continued SERIESSBD TANK TYPE HEATERS SBD MODELS 120 THRU 500A continued SERIES SeriesSERVICE HANDBOOK CLEANOUT ASSEMBLYSBD TANK TYPE HEATERS SERVICE HANDBOOKCLEANOUT ASSEMBLY SBD MODELS 120 THRU 500A continued SERIESSBD TANK TYPE HEATERS SERVICE HANDBOOKCLEANOUT ASSEMBLY SBD MODELS 120 THRU 500A continued SERIESSBD TANK TYPE HEATERS SERVICE HANDBOOKCLEANOUT ASSEMBLY SBD MODELS 120 THRU 500A continued SERIESSBD TANK TYPE HEATERS SERVICE HANDBOOKCLEANOUT ASSEMBLY SBD MODELS 120 THRU 500A continued SERIESSBD TANK TYPE HEATERS SERVICE HANDBOOKCLEANOUT ASSEMBLY SBD MODELS 120 THRU 500A continued SERIESSTATE PART COMPONENT PART INFORMATIONSPECIFICATIONS NAMESBD SERVICE CHECKLIST SBD TANK TYPE HEATERS SERVICE HANDBOOKV.WATER PIPING SBD TANK TYPE HEATERS COMMENTSSERVICE HANDBOOK Author Terry MulderCopyright 2006 State Industries, Inc State Water HeatersCOMMERCIAL The Expert’s Choice