State Industries SUF-130-300, SUF-130-400 Electronic Control, Sequence of Operation, Overview

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OPERATION

SEQUENCE OF OPERATION

Typical Control/Appliance Operating Sequence

1.When the control is powered, it should display the unit model, water temperature, setting temperature and heater status.

2.If the control determines that the actual water temperature inside the tank is below the programmed temperature setpoint less the differential, a call for heat is activated.

3.The control then performs selected system diagnostic checks. This includes confirming the proper state of the air/gas switches and ECO limit device.

4.If all checks are successfully passed, the combustion blower is energized for the pre-purge cycle.

5.When the pre-purge cycle is complete, power is applied to the ignitor element for the ignitor warm-up period.

6.At the conclusion of the igniter warm-up period, the gas valve will open, allowing gas to enter the burner chamber.

7.The igniter will remain on for a short predetermined time period, then will be turned off.

8.The control will monitor the flame sense probe to confirm a flame is present. If a flame is not verified within predetermined time period, the gas valve will immediately be closed, and the blower will continue to run for approximately 30 seconds interpurge. The control will try for ignition two more times before lockout.

9.If a flame is confirmed, the control will enter the heating mode where it will continue heating the tank water until the setpoint temperature plus differential is reached. At this point, the gas valve is closed and the control enters the post-purge cycle.

10.The combustion blower will run for the duration of the post purge cycle to purge the system of all combustion gases. When the post purge cycle is complete, the blower is de-energized and will coast to a stop.

11.The control will now enter the idle state while continuing to monitor the internal tank water temperature and the state of other system devices. If the temperature drops below the setpoint value less differential, the control will automatically return to step 2 and repeat the entire operating cycle.

ELECTRONIC CONTROL

1.Overview

Interaction with the water heater controller is done through an up, a down and three operation buttons. These buttons are shown in the following illustration. Operation of the three lower buttons is defined immediately above them on the screen. The UP and DN buttons are used to navigate through the menus and make adjustments to the water heater.

While the water heater is operating, the user interface will display the desktop screen (if there are no active faults or warnings). An example of this screen is shown in the following illustration. The first temperature on this screen is the temperature of the water

inside the tank. The second temperature on this screen is the Operating Set Point. The Operating Set Point is the temperature at which the water heater will maintain the water inside the tank. The third line on the screen is a text description of the Operational State of the water heater (please see Operating States for more details).

The row of status icons describe graphically operational details of the heater. Following is a legend of all the status icons:

2.Operating States

In the main desktop screen, there are some specific Operating States that are indicated on the status line. These are summerized in the following table:

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Contents Commercial GAS Water Heater ROUGH-IN-DIMENSIONS ForewordTable of Contents FeaturesAT a Glance Quick Installation Tips Horizontal Sidewall Venting Vertical Rooftop VentingDishwashing Machine Requirement Water Temperature Setpoint Adjustment ProcedureHigh Limit Switch E.C.O Installation Instructions Circulating PumpRequired Ability Insulation BlanketsClearances Hard WaterAIR Requirements Unconfined SpaceInstallation of Carbon Monoxide Detectors VentingCanadian Direct Vent US Horizontal Vent Direct Vent Terminal Installation Vent Pipe TerminationDirect Venting 3x 4 PVC Reducer with Intake ScreenInstallation Sequence Vertical Vent Terminal InstallationInstallation of Vent System Vent Length TableControls and Switches Connection of GAS Pipe GAS PipingHOT Surface Igniter System Connections Heater Wiring Water Potable Heating and Space HeatingSUF 130-300 Wiring Diagram SUF 130-400 Wiring Diagram Operation Electronic ControlSequence of Operation OverviewAdjusting the Operating Set Point Example of a Warning Fault and Warning ConditionsChanging the Display Units Example of a Fault Advanced Diagnostics Information Access to the Current Fault or WarningViewing the Fault History Viewing Information About the HeaterOperating Instructions Prior to Start UP Required AbilityOperating Instructions Maintenance General InformationFlushing DrainingSediment Removal Lime Scale RemovalVent System Powered Anode SystemDrain Valve and Access Panels Installation Diagrams Page Must be Identical Heaters Pipe Relief Valve to Open Drain Page Multiple Unit Installations Troubleshooting Motor will not RUN Motor RUNS, Burner Lights Momentarily Then Locks OUTGAS Fails to Shut OFF Replacement PartsNoisy Burner Operation Model SUF-130-300/400 NEA /PEA Limited Warranty Tank

SUF-130-300, SUF-130-400 specifications

State Industries, a renowned leader in the manufacturing of high-efficiency commercial water heaters, has established a strong reputation with its SUF-130-400 and SUF-130-300 models. These units are engineered for optimal performance and energy savings, making them ideal choices for various applications in industries such as hospitality, healthcare, and manufacturing.

The SUF-130-400 model offers an impressive 400,000 BTU per hour input, ensuring rapid heating and consistent hot water supply even during peak demand periods. This model is designed with a durable stainless-steel construction, providing longevity and resistance to corrosion, which is essential for demanding environments. It features a high-efficiency burner that maximizes combustion efficiency and minimizes emissions, making it a sustainable choice for businesses looking to reduce their environmental impact.

On the other hand, the SUF-130-300 model, with a slightly lower input of 300,000 BTU per hour, is perfect for smaller operations that still require a reliable and efficient hot water solution. Despite its lower capacity, this model does not compromise on performance. It incorporates advanced insulation technology that significantly reduces heat loss, enhancing overall operational efficiency and reducing energy costs.

Both models utilize a proven electronic ignition system, ensuring reliable starting and reducing the need for constant pilot light maintenance. This technology is enhanced by a highly responsive digital control system that allows users to easily monitor and adjust temperatures as needed, further promoting intuitive operation and energy savings.

Safety is a priority with these units, as they are equipped with built-in safety mechanisms including flame roll-out switches and pressure relief valves, ensuring safe operation even under the most rigorous conditions. Additionally, the easy-access design facilitates straightforward maintenance and servicing, minimizing downtime and allowing for quick responses to any operational issues.

In conclusion, the State Industries SUF-130-400 and SUF-130-300 models represent the pinnacle of efficiency and reliability in commercial water heating. Their robust construction, advanced technology, and user-friendly features make them an excellent investment for any business requiring consistent hot water supply without compromising on performance or energy efficiency. These models are poised to meet the challenges of modern water heating needs while ensuring sustainability and safety.
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