State Industries SUF-130-400, SUF-130-300 warranty Motor will not RUN

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Checking these four (4) items first will often result in a timely solution to the service call.

WARNING

JUMPING OUT COMPONENTS AND/OR CIRCUITS DURING TROUBLESHOOTING CAN CAUSE SERIOUS PROBLEMS WITH THE UNIT’S OPERATING SEQUENCE AND IGNITION SAFETY. IF YOU DO NOT HAVE THE PROPER TEST EQUIPMENT, I.E. A VOLT-OHM METER AND A MICROMETER, DO NOT ATTEMPT TO TROUBLESHOOT OR REPAIR STATE EQUIPMENT.

ALTERING THE CONTROLLER AND/OR CONTROLLER WIRING IN ANY WAY COULD RESULT IN INTERNAL DAMAGE TO THE MODULE CIRCUITS, POSSIBLY ALTERING THE IGNITION SEQUENCE ALLOWING GAS VALVES TO OPEN BEFORE THE HOT SURFACE IGNITER IS UP TO IGNITION TEMPERATURE.

NOTE: ANY BYPASS OR ALTERATION OF THE UNITS SAFETIES WILL RESULT IN VOIDING THE APPLIANCE WARRANTY.

Before performing any troubleshooting familiarize yourself with the particular appliance.

Refer to the SEQUENCE OF OPERATION and the connection diagram located on page 16 before continuing.

Make sure the appliance is connected to a 120V AC power supply, manual gas valve is in the ON position, and all electrical connections are secure before continuing to troubleshoot this appliance.

CAUTION

THE WATER HEATER IS POLARITY SENSITIVE. BEFOREAPPLYING ELECTRICITYTOTHISHEATERBECERTAINTHATSUPPLYNEUTRAL WIRE TO GROUND CHECK INDICATES ZERO VOLTAGE.

MOTOR WILL NOT RUN

1.Confirm 120V AC. Also, to verify correct polarity, check for 120 V AC between hot supply and ground. If there is no voltage, check for a loose connection.

2.For SUF 130 400, a VFD (Variable Frequency Drive) is used. "rdy" (stands for ready) will be shown on display in standby heating mode. "155" (155 output Hz) shall be shown on VFD display during heater running for SUF 130-400 model. Any other display on the VFD indicates a faulty VFD of wrong speed reference, call State Tech Support for assistance.

MOTOR RUNS, PREPURGE TIME ELAPSES BUT

MAIN FLAME NOT ESTABLISHED

1.Check to see if main manual gas valve is open.

2.Check for a loose connection at the transformer, or a defective transformer.

3.Check for a loose connection at the gas valve.

4.Check for open pressure switches or open reset button. Check for blockage in the intake and exhaust venting or at the vent hoods. If no blockage is found, check vinyl tubing for cuts or crimps. If

this tubing is damaged it must be replaced. If these steps do not eliminate the problem, replace the pressure switches.

5.Check to see if there is resistance across the igniter terminal with an OHM meter. If there is no continuity, the igniter is broken and should be replaced.

If the igniter appears to function properly, then verify that the inlet pressure is 11.0" Natural Gas (2.74 kPa). The gas valve supplied on this appliance is not designed to open against a higher pressure. At this time also check that the inlet pressure is not lower than the minimal gas supply pressure, as shown in Table 4: that is, for Natural Gas, 5.2" (1.29 kPa) W.C. If the inlet pressure is not within these limits then adjust the supply pressure accordingly.

If the inlet pressure falls within the allowable limits, then verify that the manifold pressure, when the gas is fully open, with the heater running, is as called out in Table 4: that is, for Natural Gas, 4.0" (0.996 kPa) W.C. If the manifold pressure is not correct then adjust accordingly. See ADJUSTMENT PROCEDURE in OPERATING INSTRUCTIONS selection, page 19, for the manifold pressure adjustment procedure.

6.If the inlet and manifold pressures are within the limits specified in step 5, then reset the appliance. Verify 24V AC at the gas valve during the three (3) second ignition trial, after the igniter reaches operating temperature. If 24V AC at the gas valve is not seen during this period, the controller must be replaced.

If there is 24V AC at the gas valve during the four second ignition trial and the manifold pressure does not increase above 0" W.C. then verify that the manual gas control valve is in the “ON” position (see page 20). If the valve is in the “ON” position and the previous voltage and gas pressure conditions are met, then the gas valve is defective and must be replaced.

MOTOR RUNS, BURNER LIGHTS MOMENTARILY,

THEN LOCKS OUT

1.Reset the appliance two more times to ensure that all of the air has been purged from the gas line.

2.If the burner lights momentarily but does not sustain ignition, verify that the inlet pressure is not greater than 11.0" (2.74 kPa) W.C. or lower than the minimal gas supply pressure, as shown in Table 4: that is, for Natural Gas, 5.2" (1.29 kPa) W.C. pressure. Also, the manifold pressure should rise during the three (3) second trial for ignition to the manifold pressure value for the individual unit listed in Table 4: that is, for Natural Gas, 4.0" (0.996 kPa) W.C. If the manifold pressure is not correct then adjust accordingly. See ADJUSTMENT PROCEDURE in OPERATING INSTRUCTIONS section, page 19, for the manifold pressure adjustment procedure.

3.Check for the reversed polarity in the supply wiring. This controller is polarity sensitive. If the hot and neutral supply wires are reversed, the controller will not sense flame. Reverse the supply wires and try to fire the unit.

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Contents Commercial GAS Water Heater Foreword ROUGH-IN-DIMENSIONSFeatures Table of ContentsHorizontal Sidewall Venting Vertical Rooftop Venting AT a Glance Quick Installation TipsHigh Limit Switch E.C.O Water Temperature Setpoint Adjustment ProcedureDishwashing Machine Requirement Circulating Pump Installation InstructionsRequired Ability Insulation BlanketsHard Water ClearancesAIR Requirements Unconfined SpaceVenting Installation of Carbon Monoxide DetectorsCanadian Direct Vent US Horizontal Vent Vent Pipe Termination Direct Vent Terminal InstallationDirect Venting 3x 4 PVC Reducer with Intake ScreenVertical Vent Terminal Installation Installation SequenceVent Length Table Installation of Vent SystemControls and Switches HOT Surface Igniter GAS PipingConnection of GAS Pipe System Connections Water Potable Heating and Space Heating Heater WiringSUF 130-300 Wiring Diagram SUF 130-400 Wiring Diagram Electronic Control OperationSequence of Operation OverviewAdjusting the Operating Set Point Changing the Display Units Fault and Warning ConditionsExample of a Warning Access to the Current Fault or Warning Example of a Fault Advanced Diagnostics InformationViewing Information About the Heater Viewing the Fault HistoryPrior to Start UP Required Ability Operating InstructionsOperating Instructions General Information MaintenanceDraining FlushingSediment Removal Lime Scale RemovalDrain Valve and Access Panels Powered Anode SystemVent System Installation Diagrams Page Must be Identical Heaters Pipe Relief Valve to Open Drain Page Multiple Unit Installations Troubleshooting Motor RUNS, Burner Lights Momentarily Then Locks OUT Motor will not RUNNoisy Burner Operation Replacement PartsGAS Fails to Shut OFF Tank Model SUF-130-300/400 NEA /PEA Limited Warranty

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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