State Industries SUF-130- 300/400/500 Supply Gas Regulator Installation, Gas Line Connection

Page 38

Gas Line Connection

1.The water heaters covered by this manual are shipped from the factory with a 1 1/4” supply gas connection except 500 natural gas model, see Table 1 on page 38. Short pipe nipples and reducer couplings are factory installed to increase the size of the water heater’s 24 VAC Gas Valve inlet, see Figure 53. Connect the supply gas line to the water heater's 24 VAC Gas Valve in accordance with all applicable local and national code requirements. Do not use flexible gas piping.

2.SUF 130 500 natural gas models require a 1 1/2” minimum supply gas line. All other water heaters covered by this manual require a 1 1/4” minimum supply gas line. See Table 5 on page 38.

3.Apply thread sealing compounds (pipe dope/ Teflon tape) sparingly and only to the male threads of the pipe joints. Do not apply sealing compound to the first two threads. Use pipe dope or Teflon tape marked as being resistant to the action of liquid petroleum (LP/propane) gases.

4.Use only a smooth jaw adjustable wrench (such as a monkey wrench) as a back up on the body of the 24 VAC Gas Valve when tightening the first pipe nipple into the body of the valve. Do not use a standard pipe wrench (Stillson wrench) with metal tooth jaws as this may permanently damage the valve.

5.Use a standard pipe wrench (Stillson wrench) as a back up on the first pipe nipple installed above when connecting other fittings and pipe in the supply gas line to prevent the 24 VAC Gas Valve on the water heater from twisting during installation.

6.To prevent damage, care must be taken not to apply too much torque when connecting the supply gas line to the water heater.

7.Install a sediment trap (dirt leg) as shown in Figure 52 on page 38.

8.Install a Main Gas Shutoff valve in the supply gas line as shown in Figure 52 on page 38.

Note: Should overheating occur or the gas supply fail to shut off, turn off the Main Gas Shutoff valve to the water heater.

Gas Line Leak Testing

Fire and Explosion Hazard

Use joint compound or Teflon tape compatible with propane gas.

Leak test before placing the water heater in operation.

Disconnect gas piping and main gas shutoff valve before leak testing.

Install sediment trap in accordance with NFPA 54.

Any time work is done on the gas supply system perform a leak test to avoid the possibility of fire or explosion.

1.For test pressures exceeding 1/2 psi (3.45 kPa) disconnect the water heater and its Main Gas Shutoff Valve from the gas supply piping system during testing, see Figure 52 on page 38. The gas supply line must be capped when disconnected from the water heater.

2.For test pressures of 1/2 psi (3.45 kpa) or less, the appliance need not be disconnected, but must be isolated from the supply gas line by closing the Main Gas Shutoff Valve during testing.

3.Paint all supply gas line joints and connections upstream of the water heater with a rich soap and water solution to test for leaks. Bubbles indicate a gas leak. Do not use matches, candles, flame or other sources of ignition for this purpose.

4.Repair any leaks before placing the water heater in operation.

Supply Gas Regulator Installation

The water heaters covered in this manual must have a supply gas regulator installed in the supply gas line connected to the water heater. See the Installation Requirements on page 38.

1.A supply gas regulator shall be installed for each water heater on multiple water heater installations.

2.Supply gas regulators must be rated at or above the input Btu/hr rating of the water heater they supply.

3.Supply gas regulators shall have inlet and outlet connections not less than the minimum supply gas line size for the water heater they supply. See Table 5 on page 38.

The Maxitrol 325-7L supply gas regulator or equivalent is recommended.

4.Supply gas regulator(s) shall be installed no closer than 3 feet (1 meter) and no farther than 10 feet (3 meters) from the supply gas connection on the water heater.

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Contents Commercial gas water heaters Table Of Contents Optional Safe Installation, Use and ServiceANSI/NSF-5 Hydrogen Gas Flammable General Safety InformationPrecautions Overheated water can cause water tank explosionInstalling, using or servicing Water heater Fire and Explosion HazardAbbreviations Used Preparing For The InstallationIntroduction QualificationsFeatures And Components Basic OperationTop View Components Water Heater’s 120 VAC on/off switchTop View Side Views Recovery Capacities Installation ConsiderationsRough In Dimensions Gas Line Connection SizeClearance To Combustible Materials Service ClearanceLocating The Water Heater Intake Air and Vent Pipe ClearancesHard Water Extended Vent TerminationsOptional Concentric Terminations Circulation PumpsGas Pressure Requirements Installation RequirementsPower Supply Supply Gas LineClosed Water Systems Mixing ValvesDishwashing Machines Thermal ExpansionTemperature-Pressure Relief Valve Valve Discharge Pipe RequirementsContaminated Air Condensate DrainCombustible Material Storage Condensate Drain Water TrapConfined Space Air RequirementsUnconfined Space Outdoor Air Through One Opening Fresh Air Openings For Confined SpacesOutdoor Air Through Two Openings Outdoor Air Through Two Horizontal DuctsPage Commonwealth of Massachusetts InspectionGeneral Venting Instructions Venting InstallationGeneral Venting Information Venting Requirements Direct Vent Installation Venting Installation SequencePower Vent Installation Vertical Termination Installation 3 ReducerVertical Termination Direct Vent Sidewall Termination Installation Concentric Termination Installation Inch Concentric Termination Flat Roof ClearanceInch Concentric Termination Installation Inch Concentric Termination KITInch Concentric Termination Sidewall Installation Four Concentric Terminations TWO Concentric TerminationsThree Concentric Terminations Eight Concentric TerminationsEight Concentric Terminations Multiple Concentric Termination ArrangementsTwo Concentric Terminations Direct Vent Horizontal Power Vent HorizontalVenting Arrangements Direct Vent Horizontal Concentric Direct Vent Vertical Vent Horizontal IntakeDirect Vent Horizontal Vent Vertical Intake Termination Clearances Sidewall Power Vent Power VentTermination Clearances Sidewall Direct Vent Direct VentInstallation Notes Water Heater InstallationCondensate Drain Installation Installation InstructionsSupply Gas Line Sizing U. S. Units Supply Gas Line InstallationGas Line Sizing Supply Gas Line Sizing Metric UnitsGas Line Connection Supply Gas Regulator InstallationGas Line Leak Testing Enable/Disable Circuit Electrical WiringPower Supply Connections Connecting An External Supervisory ControlValve Discharge Pipe Water Piping DiagramsWater Line Connections Thermometers not SuppliedHigh Temperature Applications Temperature RegulationHigh Temperature Limit Control ECO Thermostat ControlControl System Navigation Control System OperationOverview User Input ButtonsStatus Icons Icon DescriptionControl System Menus Operating StatesState Description Menu DescriptionBack Help User Settings & Control System MenusUpdate Cancel Description/Action DisplayChange Back Help Display Settings Description/Action Heater Information Description/Action DisplayECO Back AdvancedView Back Help YESSelect Back Help UpdateService Contact Information NameInitial Start Up Start UpPrior to Start up Manifold Gas Pressure Adjustment Supply Gas Pressure AdjustmentMultiple Appliance Installations 1050 = 300,000 Btu/hr 87.9 kW High Altitude InstallationsChecking The Firing Rate To Turn Off GasHoneywell Lighting The Water HeaterLighting & Operation Label Sequence Of Operation TroubleshootingInstallation Checklist Pre-Purge cycle Sequence Of Operation Flow ChartClosed by control system Fault Msg is displayed Water is heated to VAC Gas ValveRough Starting, Rough Operation Operational ProblemsInstallation Errors Momentary IgnitionFault And Alert Conditions Fault And Alert Messages Possible Causes Check/Repair Displayed Fault/Alert MessageBlower Prover Failure No Anode VoltageGeneral MaintenanceMaintenance Schedule Draining And FlushingLime Scale Removal Filling The Water HeaterSediment Removal Temperature-Pressure Relief Valve Test Powered Anode RodsDrain Valve and Access Panels Vent SystemDiagrams CCB Central Control Board LayoutSUF 130 300 Wiring Diagram User Interface ModulSUF 130 400, 500 Wiring Diagram UserCirculation Pump Wiring Diagrams Water Piping Diagrams Temperature & Pressure Tank Temperature ALT. Cold Water State Storage Tank Water Piping Diagrams Line Temperature Control HOT Water Outlet Pipe T&P to Open Drain Finished Floor Limited Warranty