A.O. Smith Water Heater Temperature and Pressure Relief Valve Explosion Harzard

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Temperature and Pressure Relief Valve

Explosion Harzard

Temperature-pressure relief valve must comply with ANSI Z21.22-CSA 4.4 and ASME code.

•Properly sized temperature- pressure relief valve must be installed in opening provided.

•Can result in overheating

and excessive tank pressure.

•Can cause serious injury or death.

(T&P)

RELIEF VALVE (OPTIONAL TOP T&P RELIEF VALVE NOT SHOWN)

DISCHARGE PIPE

(DO NOT CAP OR PLUG)

DRAIN LINE 3/4" ID

\\MINIMUM

1" MINIMUM

.-=,,-

-,._--_

V

 

METAL

I

_.LI _,l_

_- --

6" MAXIMUM

DRAIN PAN-_,,_

 

_'_

AIRGAP

DRAIN ._

FIGURE 15A.

For protection against excessive pressures and temperatures, a temperature and pressure relief valve must be installed in the opening marked "T & P RELIEF VALVE" (see Figure 15A). This valve must be design certified by

a nationally recognized testing laboratory that maintains periodic inspection of the production of listed equipment or materials as meeting the requirements for Relief Valves for Hot Water Supply Systems, ANSI Z21.22. The function of the temperature and pressure relief valve is to discharge water in large quantities in the event of excessive temperature or pressure developing in the water heater. The valve's relief pressure must not exceed the working pressure of the water heater as stated on the rating plate.

IMPORTANT: Only a new temperature and pressure relief valve should be used with your water heater. Do not use an old or existing valve as it may be damaged or not adequate for the working pressure of the new water heater. Do not place any valve between the relief valve and the tank.

The Temperature & Pressure Relief Valve:

•Must not be in contact with any electrical part.

•Must be connected to an adequate discharge line.

•Must not be rated higher than the working pressure shown on the rating plate of the water heater.

The Discharge Line:

•Must not be smaller than the pipe size of the relief

valve or have any reducing coupling installed in the discharge line.

•Must not be capped, blocked, plugged or contain any valve between the relief valve and the end of the dis-

charge line.

•Must terminate a maximum of six inches above a floor drain or external to the building.

•Must be capable of withstanding 250°F (121°C) without distortion.

•Must be installed to allow complete drainage of both the valve and discharge line.

T&P Relief Valve and Pipe Insulation (Some Models)

1.Locate the T&P Relief Valve on the water heater.

2.Locate the slit running the length of the insulation.

3Spread this slit open and slip it up under the T&P Relief Valve. See Figure 15B. Apply gentle pressure to the insulation to ensure it is fully seated on the T&P Relief Valve. Once sealed secure the insulation with a section of tape.

IMPORTANT: The insulation or tape should not block or cover the T&P Relief Valve drain opening. Also the

insulation or tape should not block or hinder access to the T&P Relief Valve manual relief lever.

4.Next locate the hot water (outlet) & cold water (inlet) pipes to the water heater.

5.Select one of the sections of pipe insulation and locate the slit that runs the length of the insulation.

6.Spread the slit open at the base of the insulation and slip it over the cold water (inlet) pipe. Apply gentle pressure along the length of the insulation to ensure it is fully seated around the cold water pipe. Also ensure that the base of insulation is flush with the water heater. Once seated, secure the insulation with a section of tape.

7.Repeat steps 5 through 6 for the hot water (outlet) pipe.

T&P RELIEF VALVE INSULATION

F LEVER

RELIEF VALVE

© DRAIN LINE

FIGURE 15B.

Combination Space Heating/Potable

Water System

Some water heater models are equipped with inlet/outlet connections for use with space heating applications. If this water heater is to be used to supply both space heating and domestic potable (drinking) water, the instructions listed below must be followed.

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Contents Smith InstallerWater Important Definitions Fire Hazard Improper installation and use may result in property damageFire or Explosion Harzard GET to Know Your Water Heater GAS Models Consumer Responsibilities Important Information About This Water HeaterConsumer Information Site Location Location RequirementsPmpey Damage Hazard Clearances and AccessibilityGas Pressure Gas Pressure TestingGas Requirements Gas PipingExplosion Hazard LP Gas OnlyConfined Space Unconfined SpaceCarbon Monoxide Warning RoomLouvers and Grilles All Air from Inside the BuildingAll Air from Outdoors PER Open Draft Hood InstallationChimney Connection Vent ConnectorsVent Pipe Size MA,NTA,N\ Piping InstallationClosed System/Thermal Expansion Propey Damage HazardTemperature & Pressure Relief Valve Temperature and Pressure Relief Valve Explosion HarzardRelief Valve and Pipe Insulation Some Models Combination Space Heating/Potable Water SystemAIR Solar InstallationGas Supply and Piping Vent Pipe SystemWater System Piping Before Lighting InstructionsChecking the Draft ForyoursafetyreadbeforelightingToturnoffgastoappliance Burn HazardBurner Flames Water Temperature RegulationEmergency Shut Down White Rodgers ValvesCondensation Operational ConditionsProperty Damage Hazard Draining and Flushing Routine Preventive MaintenanceAnode Rod/Water Odor Removing the Burner from the Manifold/ Burner Assembly Replacement PartsManualrelief ThermalReplacing the Thermocouple Replacing the Pilot/Pilot Tube AssemblyCleaning the Combustion Chamber and Flame-arrestor Replacing the Manifold/Burner AssemblyExternal Inspection & Cleaning of the Base-Ring Filter Removing and Replacing the Gas Control Valve/Thermostat Testing the Igniter SystemPiezoelectric Igniter System Possible Causes FVlR System Operational ChecklistThermostat set too high ProblemYES Repair Parts List Listed Parts Kits and Illustrations Page Conditions and Exceptions Limited Residential GAS WarrantyInstallation Information Claim ProcedureLimitation on Implied Warranties Disclaimers

Water Heater specifications

A.O. Smith is a renowned name in the water heating industry, celebrated for its commitment to innovation, quality, and efficiency. Their water heaters are designed to cater to a wide variety of needs, making them suitable for both residential and commercial applications. The main features of A.O. Smith water heaters are tailored to ensure optimal performance, convenience, and reliability.

One of the standout characteristics of A.O. Smith water heaters is their impressive energy efficiency. Many models are equipped with advanced insulation technologies that minimize heat loss, allowing users to save on energy bills while ensuring a consistent supply of hot water. The introduction of high-efficiency gas burners and electric heating elements enhances their energy utilization, which is reflected in their excellent Energy Factor ratings.

A.O. Smith also incorporates smart technology in its water heaters. Many models feature integrated Wi-Fi connectivity, allowing homeowners to monitor and control their water heating system remotely via a smartphone app. This capability enables users to adjust temperature settings, receive maintenance alerts, and track energy usage, providing a new level of convenience and control.

Durability is another hallmark of A.O. Smith water heaters. Constructed with high-quality materials, these units often feature a glass-lined tank that enhances corrosion resistance. Additionally, many models are designed with a robust anode rod that helps prevent rusting, extending the lifespan of the heater and ensuring dependable service for years to come.

Safety features are also a priority for A.O. Smith. Many water heaters come equipped with advanced safety mechanisms, such as automatic shut-off valves, temperature controls, and flame failure detection systems, ensuring safe operation and reducing the risk of accidents.

Different models are available to suit varying space requirements and preferences. A.O. Smith produces traditional tank water heaters as well as modern tankless options, which provide endless hot water on demand, making them ideal for homes needing high hot water consumption. Their versatility guarantees that customers can find the perfect solution tailored to their specific needs.

In conclusion, A.O. Smith water heaters represent a blend of innovation, efficiency, durability, and safety. With various models available that cater to different heating needs and preferences, A.O. Smith continues to remain a trusted choice for consumers seeking reliable hot water solutions.
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