A.O. Smith GDVT Temperature & Pressure Relief Valve, Draining, Cathodic Protection Anode

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TEMPERATURE & PRESSURE RELIEF VALVE

At least once a year, the temperature and pressure relief valve, Figure 1, must be checked to ensure that it is in operating condi- tion. Lift the lever at the top of the valve several times until the valve seats properly and operates freely.

If water does not flow, remove the valve and inspect for obstruc- tions or corrosion. Have a qualified servicer replace with a new valve of the recommended size as necessary. Do not attempt to repair the valve, as this could result in improper operation and a tank explosion. In areas with poor water conditions, it may be necessary to inspect the T&P valve more frequently.

THE WATER PASSING OUT OF THE VALVE DURING THIS CHECKING OPERATION MAY BE EXTREMELY HOT. AVOID CONTACT AND DISCHARGE SAFELY TO PREVENT WATER DAMAGE.

DRAINING

If the heater is to be shut off and exposed to freezing tempera- tures, it must be drained. Water, if left in the tank and allowed to freeze, will damage the heater.

•Turn off the gas and cold water inlet valve to the heater, Figure 1.

•Open a nearby hot water faucet and the heater drain valve.

•BE CAREFUL TO GRASP THE DRAIN VALVE HANDLE SO THAT THE HAND IS NOT EXPOSED TO HOT WATER. IF DESIRED, A HOSE MAY BE CONNECTED TO THE DRAIN VALVE TO CARRY THE WATER AWAY.

The water CAN BE HOT.

•The drain valve must be left open during the shutdown pe- riod.

•To restart heater, refer to the FILLING instructions under OP-

ERATION.

Periodically open the drain valve and allow the water to run until it flows clean. This will help prevent sediment build-up in the tank.

It is normal for lime and scale deposits to form within the tank. Such deposits will not be removed by periodic draining. It is necessary to chemically delime the affected parts in water areas where such deposits are encountered. Contact your dealer or plumber for deliming information.

CATHODIC PROTECTION - ANODE

The anode rod within the tank is designed to be slowly con- sumed cathodically, minimizing corrosion in the glass-lined tank. A hydrogen sulfide (rotten egg) odor may result if water contains high sulfate and/or minerals. Chlorinating the water supply should minimize the problem. (See EXTENDED NON-

USE PERIODS).

NOTE: Anode must remain installed (except for inspection) to avoid shortening tank life. See LIMITED WARRANTY. Replace as necessary.

ANODE ROD MAINTENANCE

The anode rod is used to protect the tank from corrosion. Most hot water tanks are equipped with an anode rod. The submerged rod sacrifices itself to protect the tank. Instead of corroding the tank, water ions attack and eat away the anode rod. This does not affect the water’s taste or color. The rod must be maintained to keep the tank in operating condition.

Anode deterioration depends on water conductivity, not neces- sarily water condition. A corroded or pitted anode rod indicates high water conductivity and should be checked and/or replaced more often than an anode rod that appears to be intact. Re- placement of a depleted anode rod can extend the life of your water heater. Inspection should be conducted by a qualified technician, and at a minimum should be checked annually after the warranty period.

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Contents Residential GAS Water Heaters Safe INSTALLATION, USE and Service Important DefinitionsGeneral Safety Table of Contents IntroductionKeep Clear of ALL Obstructions Typical 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 ClearancesVent Connections Locating Clearance Hole for VentHigh Rise Vent Arrangement Vent Assembly Securing Vent Termination Assembly to the Exterior WallStandard Vent Arrangement Uncompressing the Corrugated TubingOffset Vent Arrangement MinimumTOP Knob Figure DTemperature 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

GDV, GDVT specifications

A.O. Smith is a well-known name in the water heating industry, and its GDVT and GDV series of water heaters exemplify the company's commitment to quality, efficiency, and innovation. These models are designed to provide reliable hot water solutions for both residential and commercial needs, seamlessly integrating advanced technology and user-friendly features.

One of the main features of the GDVT and GDV series is their high energy efficiency ratings. These water heaters utilize advanced insulation and energy-saving technologies, allowing them to achieve impressive efficiency levels. The GDVT series, for instance, can achieve an Energy Factor (EF) rating of up to 0.96, making it an environmentally friendly choice that can significantly reduce energy bills. This high level of efficiency is a result of thoughtful engineering, including a highly insulated tank that minimizes heat loss.

Another standout characteristic of the GDVT and GDV series is their compact design. These models are built to fit into tight spaces, making them ideal for homes or businesses with limited installation areas. Despite their compact size, they maintain a large storage capacity, ensuring that users have access to consistent hot water. The GDVT series is particularly known for its vertical design, which allows for easy installation in smaller utility rooms or closets.

The GDV models feature a robust digital display that provides real-time information about the water heater's operation. Users can easily monitor the unit’s performance and make adjustments as needed. Additionally, these models come equipped with advanced safety features, including a built-in safety shut-off system and over-temperature protection, ensuring safe and reliable operation.

Both the GDVT and GDV series utilize A.O. Smith's innovative HydroJet® technology, which minimizes sediment buildup within the tank. This technology involves the strategic placement of an internal dip tube that maximizes water circulation, helping to extend the life of the water heater and maintain optimal performance over the years.

In summary, the A.O. Smith GDVT and GDV series water heaters are an excellent choice for those seeking a balance of efficiency, compact design, advanced technology, and enhanced safety. With their impressive energy ratings, user-friendly features, and cutting-edge technologies, these units are tailored to meet the demands of modern residential and commercial water heating solutions, ensuring a consistent supply of hot water while minimizing environmental impact.
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