State Industries SUF-130-300, SUF-130-400 warranty Controls and Switches

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VENT PIPE PREPARATION

1.INITIAL PREPARATION

A.Make sure the solvent cement you are planning to use is designed for the specific application you are attempting.

B.Know the physical and chemical characteristics and limitations of the PVC, PVC cellular core, ABS or CPVC piping materials that you are about to use.

C.Know the reputation of your pipe and cement manufacturer and their products.

D.Know your own qualifications or those of your contractor. The solvent welding technique of joining PVC, PVC cellular core, ABS or CPVC pipe is a specialized skill just as any other pipe fitting technique.

E.Closely supervise the installation and inspect the finished job before start-up.

F.Contact the manufacturer, supplier, or competent consulting agency if you have any questions about the application or installation of PVC, PVC cellular core, ABS or CPVC pipe.

G.Take the time and effort to do a professional job. Shortcuts will only cause you problems and delays in start-up. The majority of failures in these systems are the result of shortcuts and/or improper joining techniques.

2.SELECTION OF MATERIALS

PRIMER

It is recommended that Tetrahydrofuran (THF) be used to prepare the surfaces of pipe and fittings for solvent welding. Do not use water, rags, gasoline or any other substitutes for cleaning PVC cellular core, ABS or CPVC surfaces. A chemical cleaner such as MEK may be used.

CEMENT

The cement should be a bodied cement of approximately 500 to 1600 centipoise viscosity containing 10-20% (by weight) virgin PVC material solvated with tetrahydrofuran (THF). Small quantities of dimethyl formamide (DMF) may be included to act as a retarding agent to extend curing time. Select the proper cement; Schedule 40 cement should be used for Schedule 40 pipe. Never use all-purpose cements, commercial glues and adhesives or ABS cement to join PVC or CPVC pipe and fittings.

SAFETY PRECAUTION: PRIMERS AND CEMENTS ARE EXTREMELY FLAMMABLE AND MUST NOT BE STORED OR USED NEAR HEAT OR OPEN FLAME. ALSO, USE ONLY IN A WELL-VENTILATED AREA.

CONTROLS AND SWITCHES

The SUF-130-300 and 400 are equipped with four pressure switches. These switches are essential to the safe and proper operation of the unit. All switches are wired in series. The controller is set up to shut the unit down whenever there is a failure of any of the switches. It is important to understand the purpose of each switch.

contacts are normally open. When the fan increases the pressure in the burner, the pressure switch will allow the electrical contacts to close. The pressure switch is connected to the burner tap by a piece of tygon tubing. This tubing must be connected in order for the switch to change the electrical contacts. The controller requires that the electrical contacts on this air flow switch be open before it will allow the blower to come on. See Figure 13.

BLOCKED OUTLET PROVER SWITCH

The Blocked Outlet Prover Switch is set up to shut the unit off when a build-up of positive pressure in the exhaust vent pipe occurs. This switch is a positive pressure switch that requires an increase in pressure to change the electrical contacts from normally closed to open. When this switch prevents the unit from igniting, most likely the exhaust is blocked by some means. Check to see if the condensate is allowed to flow freely from the exhaust elbow and for obstructions in the exhaust venting and exhaust vent terminal. See Figure 13.

BLOCKED INLET PROVER SWITCH

The Blocked Inlet Prover Switch is set up to shut the unit off when a build-up of negative pressure in the intake vent pipe occurs. This switch is a negative pressure switch that requires an increase in negative pressure to change the electrical contacts from normally closed to open. The switch is connected to the pressure tap on the flange connected to the inlet of the blower. When this switch prevents the unit from igniting, most likely the intake is blocked by some means. Check to see if there is no more than seventy (70) equivalent feet (24.8m) of four inch PVC vent pipe on the intake. Also verify that the intake and intake vent terminal is free of obstructions that may prevent air from entering the unit. See Figure 13.

LOW GAS PRESSURE SWITCH

The Low Gas Switch (LGS) is a single-pole, normally open pressure switch that will close its contacts when a rising pressure of 4.6 in. W.C. (1.25 Kpa) is encountered. The contacts will open when the pressure falls below the fixed set point of 4.6 in. W.C. (1.25 Kpa) The LGS monitors the gas supply pressure to the heater. If the gas supply falls below 4.6 in. W.C. (1.25 Kpa), the main burner is extinguished (if heater is running) or the heater will not start up.

NOTE: LOW GAS SWITCH IS LOCATED ON INLET SIDE OF GAS VALVE. See Figure 13.

FIGURE 13.

BLOWER PROVER SWITCH

ON/OFF SWITCH

The Blower Prover Switch is provided on the heater to verify that the fan is operating. It is a positive pressure switch whose electrical

The ON/OFF Switch is a single-pole, single-throw rocker switch. This switch provides 120VAC from the line source to the heater.

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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 Required Ability Installation InstructionsCirculating Pump Insulation BlanketsAIR Requirements ClearancesHard Water Unconfined SpaceInstallation of Carbon Monoxide Detectors VentingCanadian Direct Vent US Horizontal Vent Direct Venting Direct Vent Terminal InstallationVent Pipe Termination 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 Sequence of Operation OperationElectronic Control 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 InformationSediment Removal FlushingDraining 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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