State Industries SBD71 120, SBD85 500 manual Venting, Atmospheric, Single, and Multiple Heaters

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SBD TANK TYPE HEATERS

SERVICE HANDBOOK

VENTING

Atmospheric, Single, and Multiple Heaters

All SBD water heaters are classified by ANSI as category I (non-condensing, negative pressure venting) appliances. They are approved for type B vent.

For larger applications, SBD water heaters can be common vented together either in a tapered manifold or constant size manifold. (Follow National Fuel Gas Code requirements for sizing and installation.)

Combined Vents

When vents are combined, the area of the combined vent should be equal to area of the largest single vent, plus 50% of area of all others joining.

EXAMPLE: To combine two 6” vents with an 8” vent, the area of a combined vent should be one half area of two 6 inch vents (14 + 14) plus area of 8 inch vent (50) or 78 sq. inches. Referring to chart, 78 sq. inches require 10” diameter vent.

	Area in Square		Area in Square
Vent Size	Inches	Vent Size	Inches
5"	20	10"	79
6"	28	12"	113
7"	38	14"	154
8"	50	16"	201
9"	64	18"	254

Nine Rules for Good Vents

1.The vent pipe should ALWAYS be the same size as the outlet of the draft diverter or factory supplied vent reducer.

•Model SBD 120 are supplied with a 6” to 5” reducer.

•Models SBD 250, 251 and 275 are supplied with a 8” to 6” reducer.

Technical Training Department	12
Ashland City, TN ©2003

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Contents SandBlaster SBD Handbook SBD Tank Type Heaters Service HandbookModel Breakdown SBD 85 500 P E a CGA D Clearances from Combustibles InstallationClearance to Combustibles Table ModelExterior Clearance Minimum AIR for Combustion Cubic Feet of AIR PER 1,000 BTUDirect Communication MAKE-UP AIRSquare Inch Per 4,000 Btuh Horizontal Ducts Vertical DuctsBackdraft Insufficient MAKE-UP AIR AIR 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 OperationTest the Transformer Troubleshooting SBD Water HeatersThen Ground 24 VAC FM Transformer High LIMIT, Left Terminal TestReasons For Resetting Condition Cause Solution After Push in Reset 24 VAC is now presentTest High Limit Right Terminal Check the PC Board Inspect the DamperPC Board Motor Test Service Switch Motor LeadThermostat Test Effikal Damper Adapter Service Motor Plug Switch Lead Heater HarnessNormal Operation Harness ChartTest for 24VAC Between Black Common and Brown Heater Harness Function Damper HarnessTest 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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