A.O. Smith GDV-75, GDVT-50, GDV-50, GDV-40, 186589-004 GAS Piping with Flexible Connector

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minimum inlet gas pressure shown on the rating plate is that which will permit firing at rated input.

All gas piping must comply with local codes and ordinances or with the “Natural Gas and Propane Installation Code” CAN/ CSA-B149.1 whichever applies. Copper and brass tubing and fittings (except tin lined copper tubing) shall not be used.

If the gas control valve is subjected to pressures exceeding 1/2 psi (3.5 kPa), the damage to the gas control valve could result in a fire or explosion from leaking gas.

If the main gas line Shut-off serving all gas appliances is used, also turn “off” the gas at each appliance. Leave all gas appli- ances shut “off” until the water heater installation is complete.

A gas line of sufficient size must be run to the water heater. Consult the current edition of “Natural Gas and Propane Installation Code” CAN/CSA-B149.1 and your gas supplier concerning pipe size.

There must be:

•A readily accessible manual shut off valve in the gas supply line serving the water heater, and

•A drip leg (sediment trap) ahead of the gas control valve to help prevent dirt and foreign materials from entering the gas control valve.

•A flexible gas connector or a ground joint union between the shut off valve and control valve to permit servicing of the unit.

Be sure to check all the gas piping for leaks before lighting the water heater. Use a soapy water solution, not a match or open flame. Rinse off soapy solution and wipe dry.

Use pipe joint compound or teflon tape marked as being resis- tant to the action of petroleum [Propane (L.P.)] gases.

The appliance and its gas connection must be leak tested before placing the appliance in operation.

The appliance and its individual Shut-off valve shall be discon- nected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 pound per square inch (3.5 kPa). It shall be isolated from the gas sup- ply piping system by closing its individual manual Shut-off valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 pound per square inch (3.5 kPa).

Connecting the gas piping to the gas control valve of the water heater can be accomplished by either of the two methods shown in Figures 8 and 9.

When installed at elevations above 7,700 feet (2,347 meters), input rating should be reduced at the rate of 4 percent for each 1,000 feet (305 meters) above sea level which requires replacement of the burner orifice in accordance with “Natural Gas and Propane Installation Code” CAN/CSA-B149.1. Contact your local gas supplier for further information.

Failure to replace the standard orifice with a high altitude orifice when installed could result in improper and inefficient operation of the appliance, producing carbon monoxide gas in excess of safe limits, which could result in serious injury or death. Contact your gas supplier for any specific changes which may be re- quired in your area.

FIGURE 8 GAS PIPING WITH

FLEXIBLE CONNECTOR.

FIGURE 9 GAS PIPING WITH ALL

BLACK IRON PIPE TO GAS CONTROL.

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Contents Residential GAS Water Heaters Safe INSTALLATION, USE and Service Important DefinitionsGeneral Safety Table of Contents IntroductionTypical Installation GET to Know Your Water Heater Replacement PartsMixing Valve Usage Hotter Water can ScaldLocating the NEW Water Heater Facts to Consider about the LocationInsulation Blankets Ventilation for Appliances Located in Confined SpacesVent Termination Installing the NEW Water Heater Required AbilityInspect Shipment GeneralTEMPERATURE-PRESSURE Relief Valve Valve and Pipe Insulation if SuppliedWater Potable Heating and Space Heating Closed Water SystemGAS Piping GAS Piping with Flexible Connector High Altitude Installations Sediment Traps Filling the Water HeaterVenting Combustion AIR and Ventilation Vent Terminal ClearancesDV Termination Safety Cover Vent ConnectionsLocating Clearance Hole for Vent High Rise Vent ArrangementVent Assembly Securing Vent Termination Assembly to the Exterior WallStandard Vent Arrangement Uncompressing the Corrugated TubingOffset Vent Arrangement Figure a Temperature Regulation Temperature RegulationFor Your Information External DamageStart UP Conditions Operational ConditionsAIR in HOT Water Faucets Maintenance Venting System InspectionPilot and Main Burner Temperature & Pressure Relief Valve Anode ROD MaintenanceDraining Cathodic Protection AnodeDrain Valve Washer Replacement Service Leakage CheckpointsTroubleshooting Guidelines Problem Possible Causes CorrectionSlow HOT Water Recov ERYDrip from Relief Valve Thermostat Fails toPage Series Tank Parts XCV, XCVL, XCVH, XVRXCVT, Xcvx Conditions and ExceptionsService and Labor Responsibility Claim ProcedureInstallation Information Limitation on Implied WarrantiesTennessee Waltz Parkway Ashland CITY, TN

186589-004, GDVT-50, GDV-75, GDV-40, GDV-50 specifications

A.O. Smith is a recognized name in the water heating industry, known for its reliable and efficient water heaters. Among its notable products are the GDV-50, GDV-40, GDV-75, GDVT-50, and 186589-004 models. These water heaters offer enhanced performance, energy efficiency, and modern technologies suited for residential and commercial applications.

The GDV series includes the GDV-50, GDV-40, and GDV-75 models, which feature a robust design typically made from high-quality materials to ensure longevity. These units come equipped with advanced insulation, which minimizes heat loss and increases efficiency, making them excellent choices for households with varying hot water needs.

The GDV-50 model boasts a tank capacity of 50 gallons, making it suitable for medium to large households. It features a powerful heating element that heats water quickly, providing ample hot water for daily use. Meanwhile, the GDV-40 is designed for smaller households with a 40-gallon capacity. This model strikes a balance between size and efficiency, catering to lighter hot water demands while maintaining excellent performance.

For larger households, the GDV-75 provides a 75-gallon capacity, ensuring that even the most demanding hot water applications can be met with ease. This model is particularly ideal for families that require hot water in large quantities or at peak times.

The GDVT-50 is a versatile model that features advanced technology, such as an integrated digital display that allows users to monitor and adjust settings easily. This offers greater control over temperature settings and energy usage, making it not only convenient but also more energy-efficient.

The A.O. Smith 186589-004 is an accessory designed for specific model enhancements that improve overall performance and safety. It may include additional safety features, such as high-temperature limit switches and automatic shut-off mechanisms that provide peace of mind for users.

All these models are equipped with A.O. Smith’s innovative technologies, including advanced thermostat controls and durable components designed to withstand frequent use. They typically come with generous warranties, underscoring the manufacturer's commitment to quality and customer satisfaction.

In summary, A.O. Smith water heaters, particularly the GDV-50, GDV-40, GDV-75, GDVT-50, and 186589-004, are built for efficiency, reliability, and performance. With various capacities and the latest technologies, they cater to the diverse needs of homeowners and businesses, ensuring that hot water is always available when needed.
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