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State Industries SBD71 120 Harness Chart, Normal Operation, Heater Harness, Function, Step, Then

Models: SBD85 500 SBD71 120

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SBD TANK TYPE HEATERS

SERVICE HANDBOOK

HARNESS CHART

Heater Harness	Function	Damper Harness
Black	24V Hot	1-Brown
Yellow	24V from Thermostat	2-Orange
Red	24V from damper	3-Yellow
White	24V common	4-Black

NORMAL OPERATION

Condition:

•Heater on standby

•Damper closed

•High Limit closed

Wires are from left to right:

Black i Yellow i Brown i Orange

STEP 8

TEST FOR 24VAC BETWEEN BLACK (COMMON) AND BROWN

STEP 8. TEST FOR 24VAC BETWEEN BLACK (COMMON) AND BROWN

IF	THEN
24VAC is present	Continue to Step 8A.
24VAC is not present	See Troubleshooting Step 9A

Technical Training Department	26
Ashland City, TN ©2003

Page 27

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State Industries SBD71 120 Harness Chart, Normal Operation, TEST FOR 24VAC BETWEEN BLACK COMMON AND BROWN, Heater Harness

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 MinimumMAKE-UPAIR DIRECT COMMUNICATION 1 Square Inch Per 4,000 BTUHSBD TANK TYPE HEATERS SERVICE HANDBOOK MAKE-UPAIR VERTICAL DUCTSHORIZONTAL DUCTS SBD TANK TYPE HEATERS SERVICE HANDBOOKINSUFFICIENT MAKE-UPAIR BACKDRAFTSBD TANK TYPE HEATERS SERVICE HANDBOOK CONTAMINATED AIR AIR FOR COMBUSTION Flammable ItemsSBD TANK TYPE HEATERS SERVICE HANDBOOK Natural Gas Supply Gas Manifold Pressure Tap Dirt LegManifold Gas Port GAS PRESSURE REQUIREMENTSSBD GAS VALVE SBD TANK TYPE HEATERS SERVICE HANDBOOKSee 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 SeriesSBD ELECTRICAL SEQUENCE OF OPERATION 115/60/12ASBD 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 HANDBOOKGENERAL SERVICE CHART SERVICE HANDBOOKSBD TANK TYPE HEATERS GENERAL QUESTIONS AND ANSWERS SERVICE HANDBOOKSBD TANK TYPE HEATERS EFFIKAL DAMPER DRIVE ASSEMBLY GAS VALVES SBD MODELS 120 THRU 500ASERIES 110/111 SERVICE HANDBOOKSBD MODELS 120 THRU 500A continued SERIES SERVICE HANDBOOKSBD 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 SERVICE HANDBOOK SBD TANK TYPE HEATERSV.WATER PIPING SBD TANK TYPE HEATERS COMMENTSSERVICE HANDBOOK Author Terry MulderCopyright 2006 State Industries, Inc State Water HeatersCOMMERCIAL The Expert’s Choice

HARNESS CHART

Heater Harness

Function

Damper Harness

NORMAL OPERATION

TEST FOR 24VAC BETWEEN BLACK (COMMON) AND BROWN