Condensation, Cathodic Protection Anode

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

DANGER

The water CAN BE HOT.

•The drain valve must be left open during the shutdown period.

•To restart heater, refer to the FILLING instructions under

OPERATION.

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.

CONDENSATION

Combustion products contain water vapor which can condense on the cooler surfaces of the tank forming droplets which drip into the fire or run out on the floor. This is common at the time of startup, after installation, during periods of time when incoming water is very cold, or the heater may be undersized for the requirements.

Occasional or steady water leakage from the bottom of the flue may be caused by corrosive combustion products or an improper vent. Check with your dealer for more information.

CATHODIC PROTECTION - ANODE

The anode rod within the tank is designed to be slowly consumed 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 necessarily 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. Replacement 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.

CAUTION

Before removing the anode: 1) the tank water should be cool, 2) the cold water shut off valve must be closed, and 3) water pressure must be relieved by opening a nearby faucet.

GDVH, XDVS, GDVS specifications

A.O. Smith is a leading manufacturer of water heating solutions, renowned for offering innovative products that cater to both residential and commercial needs. Among its impressive lineup, the GDVH, XDVS, and GDVS models stand out, showcasing advanced features and technologies that enhance performance and efficiency.

The A.O. Smith GDVH series is designed for high-efficiency gas water heating. These units come equipped with the latest condensing technology, which allows them to utilize heat that would otherwise be lost in traditional systems. This process results in improved energy efficiency and significant cost savings on energy bills. The GDVH series is also noted for its EcoSmart feature, which adjusts the operational settings according to water usage patterns, further optimizing energy consumption.

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In conclusion, A.O. Smith's GDVH, XDVS, and GDVS water heaters present a blend of cutting-edge technology, rugged durability, and user-friendly features, catering to the needs of modern households and businesses. With energy efficiency as a hallmark of their design, these models not only promise excellent performance but also contribute to sustainable energy usage, making them an ideal choice for eco-conscious consumers.