A.O. Smith TC-049-R2 manual Construction, Heating elements

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RESIDENTIAL GAS AND ELECTRIC WATER HEATER

SERVICE HANDBOOK

STANDARD RESIDENTIAL ELECTRIC WATER HEATER SERVICE GUIDELINES

Construction

See “General Section” for features common to both gas and electric models. Miscellaneous:

Amperage (Amps) (1 phase) = Watts divided by Volts

Amperage (3 phase) = (Watts X .577) divided by Volts

KW Required = (GPH X 8.25 X Temp. Rise X 1.0) divided by (3413) Ohms = Volts divided by Amperes

One kilowatt is equal to 1000 watts

One kilowatt is equal to 3,413 BTU

Recovery Rate = (KW X 3413) divided by (Temp. Rise X 8.25)

Rise (F°) = (KW X 3413) divided by (GPH X 8.25)

Supply electrical fusing or breakers should be sized at least 125% of expected heater amperage.

Water weighs 8.25 pounds per gallon at 120°F (49°C).

%of Hot water = (Mixed temp. – Cold) divided by (Hot temp. – Cold)

Heating element(s)

This style water heater will have one or two electric, heating elements immersed in the tank. One element will always be located low in the tank; a second element is commonly located

down about 1/3 of the tank height from the top of the tank. These elements will seldom be wired to operate at the same time. (If they operate at the same time, amperage draw doubles, wire gauge size increases, fuse size increases and little is gained in heat recovery.)

A.O. Smith Water Products Company

18

Training Department

©2002

Ashland City, Tennessee

 

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Contents Smith Service Handbook Residential GAS and Electric Water Heater Table of ContentsQualifications Tools Required Formulas General Section Service GuidelinesMiscellaneous Information General Section ConstructionLighting Pilot Installation of Residential GAS Water HeaterConstruction See also General section of this manual Residental GAS Water Heater ServiceResidential Gas Normal OperationService Handbook Setting Approximate Temperature F Time To Cause Injury BTU 000Fuel Enters HereGas Pressure If … … thenManifold Pilot GasThermocouple output test Procedures/Conditions Electrical TestingSooting causes If … … then Condensation ProceduresResidential Gas Electrical Testing If… … thenCondensation is a mild acid it will corrode steel Exhaust Venting Notes 125 Standard Residential Electric Water Heaters Heating elements ConstructionResidential Electric Voltage NotesSurface Mounted Thermostat s and High Limit s Newer TemperatureLocation Range F Service Handbook Normal Sequence of Operation Wiring DiagramSingle Element Single Thermostat Single High Limit Operation From cold tank of water CircuitElements Thermostats High Limit Operation From cold tank of water Wiring DiagramElements Thermostats High Limits Wire Service Handbook Post Cold tank of water Single Electrical Service Single Phase Certification and Approvals Wattage Three Phase Unbalanced CircuitTest probe on each terminal of an element Element Test Ohms Resistance Check Test ConditionsTest voltage between 4 and 2 or T2 and L4 If … … then ProcedureResidential Electric Service Complaint No Hot Water ConditionsVoltage Check Test between 4 and 2 or L4 and T2 If … … then Residential Electric Service No Hot WaterTest between the two element terminals If … … then Complaint Water Too Hot ConditionsResidential Electric Service Water Too Hot Test around red wire then black wire to element If … … thenGrounded Element Check Amperage Method Circuit Servicing Test between 1 and 3 or L1 and L3 If … … then Testing with the MultimeterComplaint No hot water Test Conditions Voltage CheckTest between high limit 4 and lower thermostat 2 or L4 Residential Electric Service Voltage Check No Hot WaterComplaint Lack of Hot Water Conditions Test between high limit 4 and lower thermostat 1 or L4Service Handbook Supply wiring may be a See Pages 25 Testing The A-7 Wiring CircuitPrior To Post Test probe on each terminal of an element If … … then Test between upper high limit terminals 2 Power onVoltage Checks Test between upper high limit terminals 1 If … … thenTest between lower high limit terminal 1 and 3 or L1 and L3 Complaint Lack of Hot Water Test ConditionsTest between the terminals of the lower element If … … then Test ConditionPower on Thermostats are satisfied Watts divided by Volts = Amps Replacement elementsVolts times Amps = Watts Service Handbook Smith Technical Bulletins WHY Water Heater Tanks Leak What Prevention What WHY Prevention WHY Water Heater Tanks LeakWater Conditions FIX Water HammerGeneral EffectsMineral BUILD-UP SymptomsCause If tank is new with no lime build-up to any degree Aluminum HydroxideTreatment Discolored WaterSmelly Water Procedure Chlorination ProcedureTest Not Enough HOT Water GASNot Enough HOT Water Electric Follow these easy steps to diagnose thermal expansion Thermal ExpansionService Handbook Leaking Temperature and Pressure Relief Valve For every technical problem There is a solution

TC-049-R2 specifications

The A.O. Smith TC-049-R2 is a highly efficient and reliable water heater designed to meet the needs of both residential and light commercial applications. This gas-fired water heater offers a perfect blend of performance, efficiency, and durability, making it a popular choice among homeowners and business owners alike.

One of the standout features of the A.O. Smith TC-049-R2 is its tankless design. Unlike traditional water heaters with storage tanks, the TC-049-R2 heats water on demand, which means you only use energy when you need hot water. This not only results in lower energy bills but also provides an endless supply of hot water, ideal for households with multiple bathrooms or high hot water demands.

The TC-049-R2 is powered by natural gas, which enhances its efficiency and operating costs. With an impressive energy factor, this water heater is designed to conserve energy without compromising on performance. The unit also boasts a high recovery rate, which means it can quickly replenish hot water, ensuring you’re never left waiting.

Another notable technology in the A.O. Smith TC-049-R2 is its advanced electronic ignition system, which provides reliable start-up and reduces the chance of pilot light issues. Additionally, the unit features a scaled-down footprint, making it suitable for installation in tighter spaces, such as closets or utility rooms, without sacrificing performance.

Durability is a key characteristic of the TC-049-R2, as it is constructed with high-quality materials designed to resist corrosion and withstand typical wear and tear. The unit is equipped with a durable heat exchanger that enhances both efficiency and longevity, ensuring many years of reliable service.

Safety features are also prioritized in the A.O. Smith TC-049-R2. It comes equipped with advanced safety controls that prevent overheating and ensure safe operation. This offers peace of mind for users, knowing that the unit has multiple safeguards in place.

Overall, the A.O. Smith TC-049-R2 is an excellent choice for those seeking an efficient, reliable, and safe water heating solution. Its combination of advanced features, innovative technology, and robust construction makes it a leader in the water heater market, providing convenience and comfort to its users for years to come.
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