American Water Heater VG6250T76NV Series 100 High Altitude Installation, Gas Piping

discharge opening must not be blocked or reduced in size under any circumstances. Excessive length, over 30 feet (9.14 m), or use of more than four elbows can cause restriction and reduce the discharge capacity of the valve.

No valve or other obstruction is to be placed between the Temperature-Pressure Relief Valve and the tank. Do not connect discharge piping directly to the drain unless a 6” (15.2 cm) air gap is provided. To prevent bodily injury, hazard to life, or property damage, the relief valve must be allowed to discharge water in adequate quantities should circumstances demand. If the discharge pipe is not connected to a drain or other suitable means, the water flow may cause property damage.

CAUTION

Water Damage Hazard

•Temperature-Pressure Relief Valve discharge pipe must terminate at adequate drain.

T&P Valve Discharge Pipe Requirements:

•Should not be smaller in size than the outlet pipe size of the valve, or have any reducing couplings or other restrictions.

•Should not be plugged or blocked.

•Should not be exposed to freezing temperatures.

•Should be of material listed for hot water distribution.

•Should be installed so as to allow complete drainage of both the

Temperature-Pressure Relief Valve and the discharge pipe.

•Must terminate a maximum of six inches above a floor drain or external to the building. In cold climates, it is recommended that the discharge pipe be terminated at an adequate drain inside the building.

•Should not have any valve or other obstruction between the relief valve and the drain.

HIGH ALTITUDE INSTALLATION

This heater is approved for operation up to 5,300 feet (1,615 m)

without alteration. High altitude models are available from the factory

for elevations between 5,300 feet (1,615 m) and 10,100 feet (3,079 m). For elevations above 10,100 feet (3,079 m) the input rating should be reduced at the rate of 4 percent for each 1,000 feet (305

m)above sea level which requires replacement of the burner orifice in accordance with National Fuel Gas Code (ANSI Z223.1/NFPA 54).

Contact your local gas supplier for further information.

Failure to replace standard orifice with a high altitude orifice when installed above 10,100 feet (3,079 m) 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 required in your area.

Gas Piping

DANGER

•Burn hazard.

•Hot water discharge.

•Keep clear of Temperature- Pressure Relief Valve discharge outlet.

Fire and Explosion Hazard

Do not use water heater with any gas other than the gas shown on the rating plate.

Excessive pressure to gas control valve can cause serious injury or death

Turn off gas lines during installation.

The Temperature-Pressure Relief Valve must be manually operated at

least twice a year. Caution should be taken to ensure that (1) no one

is in front of or around the outlet of the Temperature-Pressure Relief

Valve discharge line, and (2) the water manually discharged will not

cause any bodily injury or property damage because the water may be extremely hot. If after manually operating the valve, it fails to completely reset and continues to release water, immediately close the cold water inlet to the water heater, follow the draining instructions in this manual, and replace the Temperature-Pressure Relief Valve with a properly rated/sized new one.

Note: The purpose of a Temperature-Pressure Relief Valve is to prevent excessive temperatures and pressures in the storage tank. The T&P valve is not intended for the constant relief of thermal expansion. A properly sized thermal expansion tank must be installed on all closed systems to control thermal expansion, see Closed Water Systems and Thermal Expansion on page 14 and 15.

If you do not understand these instructions or have any questions regarding the Temperature-Pressure Relief Valve call the toll free number listed on the back cover of this manual for technical assistance.

Contact qualified installer or service agency.

Make sure the gas supplied is the same type listed on the model rating plate. The inlet gas pressure must not exceed 14 inch water column (3.5 kPa) for natural and propane gas (L.P.). The 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 National Fuel Gas Code (ANSI Z223.1/ NFPA-54). Copper or brass tubing and fittings (except tin lined copper tubing) should 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 Shuttoff serving all gas appliances is used, also turn “off” the gas at each appliance. Leave all gas appliances shut “off” until the water heater installation is complete.

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