A.O. Smith AOSRE50400 warranty Filling the Water Heater

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This heater is provided with a properly certified combination temperature - pressure relief valve by the manufacturer.

The valve is certified by a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment of materials as meeting the requirements for Relief Valves for Hot Water Supply Systems, ANSI Z21.22 • CSA 4.4, and the code requirements of ASME.

If replaced, the valve must meet the requirements of local codes, but not less than a combination temperature and pressure relief valve certified as indicated in the above paragraph.

The valve must be marked with a maximum set pressure not to exceed the marked hydrostatic working pressure of the water heater (150 psi = 1,035 kPa) and a discharge capacity not less than the water heater input rate as shown on the model rating plate.

For safe operation of the water heater, the relief valve must not be removed from its designated opening nor plugged.

The temperature-pressure relief valve must be installed directly into the fitting of the water heater designed for the relief valve. Provide tubing so that any discharge will exit only within 6 inches (153 mm) above an adequate drain, or external to the building or structure. Be certain that no contact is made with any live electrical part. The 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 relief valve and the tank. Do not connect tubing directly to discharge drain unless a 6 inch air gap is provided. The relief valve must be allowed to discharge water in sufficient quantities, should circumstances demand, to prevent bodily injury, hazard to life, or property damage. If the discharge pipe is not connected to a drain or other suitable means, the water flow may cause property damage.

The Discharge Pipe:

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

Shall not be plugged or blocked.

Shall be of material listed for hot water distribution.

Shall be installed so as to allow complete drainage of both the temperature-pressure relief valve, and the discharge pipe.

Shall terminate at an adequate drain or external to the building or structure.

Shall not have any shut-off valve between the relief valve and tank nor in the discharge pipe.

The temperature-pressure relief valve must be manually operated at least once 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, and replace the temperature-pressure relief valve with a new one.

Filling the Water Heater

Never use this water heater unless it is completely full of water. To prevent damage to the tank and heating element, the tank must be filled with water. Water must flow from the hot water faucet before turning “ON” electrical supply to the water heater. The manufacturer will not warrant any elements damaged by failure to follow instructions.

To fill the water heater with water:

1.Open the cold water supply valve to the water heater.

NOTE: The cold water supply valve must be left open when the water heater is in use.

2.To ensure complete filling of the tank, allow air to exit by opening the nearest hot water faucet. Allow water to run until a constant flow is obtained. This will let air out of the water heater and the piping.

3.Check all water piping and connections for leaks. Repair as needed.

4.Never alter or modify the certified construction of the water heater or its components, or bypass any safety features. Doing so voids all warranties.

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Contents Residential Electric Important Definitions Safe INSTALLATION, USE and ServiceGeneral Safety Introduction Table of ContentsHotter Water can Scald Typical Installation Mixing Valve Usage Locating the NEW Water Heater Read ALL Instructions Before Using this Water Heater Facts to Consider About the Location Insulation BlanketsInstalling the NEW Water Heater MountingWater Piping Water Piping Pressure Test Temperature- Pressure Relief ValveFilling the Water Heater Wiring Diagram Wiring Temperature Adjustment Temperature RegulationFor Your Information Thermal ExpansionOperational Conditions Temperature-Pressure Relief Valve Operation Periodic MaintenanceAnode ROD Inspection DrainingElement Cleaning / Replacement Thermostat Removal / ReplacementReplacement RemovalHigh Limit Switch Removal and replacement ServiceTo Remove and Replace Anode Leakage Checkpoints Problem Possible Causes Corrective Action Troubleshooting GuidelinesRepair Parts List Conditions and Exceptions Residential Electric WarrantyClaim Procedure Service and Labor ResponsibilityLimitation on Implied Warranties DisclaimersPage