State Industries SBD71 120, SBD85 500 manual Harness Chart, Normal Operation

Page 27

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

Image 27

Contents SandBlaster SBD Handbook SBD Tank Type Heaters Service HandbookModel Breakdown SBD 85 500 P E a CGA D Model InstallationClearances from Combustibles Clearance to Combustibles TableExterior Clearance Minimum AIR for Combustion Cubic Feet of AIR PER 1,000 BTUMAKE-UP AIR Direct CommunicationSquare Inch Per 4,000 Btuh Horizontal Ducts Vertical DuctsBackdraft Insufficient MAKE-UP AIRAIR for Combustion Contaminated AIRNatural Gas Propane Gas GAS Pressure RequirementsSBD GAS Valve Atmospheric, Single, and Multiple Heaters VentingNine Rules for Good Vents Nine Rules for Good Vents Power Vent Kits for Sidewall Venting Sequence of Operation SBD Sequence of OperationSBD Electrical Sequence 115/60/12A SBD Electrical Sequence of OperationTroubleshooting SBD Water Heaters Test the TransformerThen Ground 24 VAC FM Transformer High LIMIT, Left Terminal TestAfter Push in Reset 24 VAC is now present Reasons For Resetting Condition Cause SolutionTest High Limit Right Terminal Check the PC Board Inspect the Damper PC Board Motor Test Service Switch Motor LeadThermostat Test Effikal Damper Adapter Service Motor Plug Switch Lead Heater HarnessHeater Harness Function Damper Harness Harness ChartNormal Operation Test for 24VAC Between Black Common and BrownTest for 24VAC Between Black and Yellow Test for 24VAC Between Black and OrangeTest Between Black Common and Brown on the Damper Board Troubleshooting the Effikal DamperService Switch A1 is CORRECT, Check Service Switch PositionAdjust END Switch to CAM Contact Wire Harness Test IID Module Test Pilot Spark Test Power To Module May Be Interrupted To ResetSBD 120 400 GAS Valve Pilot Valve OHM TestPilot GAS Manifold Pressure TAP Blue White RED Pilot Valve Test SBD 500 onlyMain Burner Test Flame Rectification Flame RectificationPilot is lit Sparking has stopped Main GAS Valve Check Main GAS Valve Coil Check SBD 500 only Main GAS Valve Coil CheckGeneral Service Chart General Questions and Answers Series 110/111 SBD Models 120 Thru 500ASBD Models 120 Thru 500A Series Series Parts Description Pilot Burner, LP 193314-3 CGA Manifold 76244 76244-2 195121-1 98185-2 Component Part Information Name Specifications State Part NumbersSBD Service Checklist Water Piping Author Terry Mulder CommentsCommercial

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