State Industries SBD71 120, SBD85 500 manual SBD Sequence of Operation

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SBD TANK TYPE HEATERS

SERVICE HANDBOOK

SBD SEQUENCE OF OPERATION

1.Thermostat calls for heat

7.Thermostat satisfies

3.Intermittent Ignition Control

5.Main gas valve opens

SEQUENCE OF OPERATION

9.Flue damper closes

2.Flue damper opens

4.Pilot gas opens, Pilot sparks and flame proves

6.Main burner ignites

8.Main and pilot burners "OFF"

To understand SBD tank type water heaters, an examination of their sequence of operation is necessary.

When the thermostat calls for heat, the relay in the draft hood assembly activates the flue damper motor. The damper opens and power flows to the IID (Intermittent Ignition Device). This activates the IID module to open the pilot valve and begin sparking at the pilot burner assembly. Once the pilot flame is established and confirmed back to the IID, the sparking is stopped and the main gas valve is opened, allowing gas flow to the main burner. When the thermostat satisfies, main and pilot gas is shut off. Damper is returned to closed position.

Technical Training Department

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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 Model InstallationClearances from Combustibles Exterior Clearance Excess AIR AIR for Combustion Cubic Feet of AIR PER 1,000 BTUDirect Communication MAKE-UP AIRHorizontal Ducts Vertical DuctsBackdraft Insufficient MAKE-UP AIRAIR for Combustion Contaminated AIRGAS Pressure Requirements Supply Gas Manifold Pressure Tap Dirt Leg Gas PortSBD 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 SBD Electrical Sequence of Operation Then Troubleshooting SBD Water HeatersTest the Transformer Ground 24 VAC FM Transformer High LIMIT, Left Terminal TestDamper Motor Test High Limit Right TerminalCheck the PC Board Inspect the DamperPC Board Motor Test Service Switch Motor LeadThermostat Test Effikal Damper Normal Operation Harness ChartTest for 24VAC Between Black Common and Brown Test for 24VAC Between Black Common and Brown ThenTest 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 DamperA1 is CORRECT, Check Service Switch Position Adjust END Switch to CAM Contact Wire Harness Test IID Module Test Pilot Spark Test SBD 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 SBD Models 120 Thru 500A Series SBD Models 120 Thru 500A Series SBD Models 120 Thru 500A Series SBD Models 120 Thru 500A Series SBD Models 120 Thru 500A SBD Models 120 Thru 500A Series Component Part Information Name SpecificationsNatural Propane SBD Service ChecklistWater Piping Author Terry Mulder CommentsCommercial
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SBD85 500, SBD71 120 specifications

State Industries has long been recognized as a leader in the manufacturing of water heaters and other thermal products, and its SBD85 500 and SBD71 120 units are prime examples of their innovative approach to energy efficiency and performance. These models are designed to meet diverse residential and commercial needs, showcasing the company's commitment to quality, reliability, and advanced technology.

The SBD85 500 model is an electric water heater designed to deliver an impressive capacity of 85 gallons. It features a glass-lined tank that provides durability and long-lasting performance. The insulation is a key characteristic, as it minimizes heat loss, thereby enhancing energy efficiency. One of the standout technologies integrated into this unit is the high-efficiency heating elements, which ensure rapid heating of the water while consuming minimal energy.

Furthermore, the SBD85 includes adjustable thermostats that allow users to customize their water temperatures according to specific needs. This feature not only improves user comfort but also contributes to lower energy bills by allowing for more efficient energy use. The model is engineered to operate quietly, making it an ideal choice for residential applications where noise levels can be a concern.

On the other hand, the SBD71 120 offers a more compact solution with a capacity of 71 gallons, making it suitable for smaller spaces while still providing robust performance. This model is equally energy-efficient, benefiting from similar technologies such as high-quality insulation and advanced heating elements. The SBD71 is particularly noted for its compact design, which allows for installation in tight areas without compromising on performance.

Both models are built with user-friendly features, including easy connections for water and electrical supply, and clear indicators for maintenance needs. Safety is also a priority in the design of these units, with built-in temperature relief valves to prevent overheating and pressure buildup.

In conclusion, the State Industries SBD85 500 and SBD71 120 water heaters embody the company's dedication to quality and technological advancement. Whether for a large household or a smaller living space, these models provide efficient, reliable hot water solutions tailored to meet the demands of modern consumers. With their advanced features and exceptional performance, they represent a smart investment in energy efficiency and long-term value.
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