American Water Heater DCG3-Series, ADCG, 71681 GAS Supply and Piping, Gas Requirements, Gas Piping

Index

GAS SUPPLY AND PIPING

Explosion Hazard

Use a new AGA or CSA approved gas supply line.

Install a shut-off valve.

Do not connect a natural gas water heater to a L.P. gas supply.

Do not connect a L.P. gas water heater to a natural gas supply.

Failure to follow these instructions can result in death, explosion, or carbon monoxide poisoning.

Gas Requirements

Read the data plate to be sure the water heater is made for the type of gas being used. This information will be found on the data plate located on the front of the water heater. If the information does not agree with the type of gas available, do not install or operate the water heater. Call your dealer.

Note: An odorant may be added by the gas supplier to the gas used by this water heater. This odorant may fade over an extended period of time. Do not depend upon this odorant as an indication of leaking gas.

Gas Piping

The gas piping must be installed according to all local and state codes, or in absence of local and state codes, with the “National Fuel Gas Code”, ANSI Z223.1 (NFPA 54)-latest edition. Canadian installations must be per- formed in accordance with CAN/CSA-B149.1.

Note: If using a flexible gas connector, make sure its rating tag matches or exceeds the input of the water heater.

Tables 2, 3A, and 3B on page 15 provide a sizing reference for commonly used gas pipe materials. Consult the “National Fuel Gas Code” or “Natural Gas and Propane Installation Code” for the recommended gas pipe size of other materials. Follow the instructions below and reference Figure 10 for gas piping installa- tion.

1.Install a readily accessible manual shut-off valve in the gas supply line as recommended by the local utility. Know the location of this valve and

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how to turn off the gas to this unit.

2.Install a drip leg as shown. The drip leg must be no less than 3 inches (76mm) long for the accumula- tion of dirt,foreign material and water droplets.

3.Install a ground joint union between the water heater and the manual shut-off valve. This is to allow easy servicing.

4.Turn the gas supply on and check for leaks. Use a chloride-free soap and water solution (bubbles forming indicate a leak) or other approved method.

Figure 10: Gas Piping

Manual Gas

Shut-off Valve

Ground

Joint

Union

Check with local utility for min. height

Drip leg

Gas Pressure

Important: The gas supply pressure must not exceed the maximum supply pressure as stated on the water heater’s data plate. Minimum supply pressure should also be maintained per the data plate.