A.O. Smith TC-049-R2 manual Water Conditions, WHY Water Heater Tanks Leak, What WHY Prevention

Page 49

RESIDENTIAL GAS AND ELECTRIC WATER HEATER

SERVICE HANDBOOK

WHY WATER HEATER TANKS LEAK -Continued

WATER CONDITIONS

WHAT

WHY

PREVENTION

“Hard” Water

“Hard” water contains minerals.

“Flush” the sand from the tank every 6

(Gas Water

As water is heated the minerals

months.

Heaters)

separate from the water and

Delime the tank interior yearly.

 

attach to hot surfaces within the

Install a water softener in hard water

 

tank. In gas water heaters, these

areas. These should be adjusted

 

minerals “insulate” the heat

according to manufacturer’s

 

transfer surfaces conducting heat

recommendations, typically for 5 grains

 

from the burner through to the

hardness.

 

water. These surfaces become

 

 

hotter than if they were clean.

 

 

Hotter surfaces mean more

 

 

expansion and contraction of the

 

 

metal as the burner cycles on and

 

 

off. The metal or weld joints

 

 

crack.

 

“Hard” Water

See above explanation.

Inspect and clean elements as

(Electric Water

Lime (calcium) forms on the

necessary.

Heaters)

electric elements.

Add a water softener.

 

Elements become excessively hot

Install elements resistant to failure due to

 

and may split.

Lime (mineral) build up.

 

Split elements often leak to the

 

 

outside of the heater.

 

Water

Water stored at 160°F (72 °C)

Begin with a water heater setting of

Temperature

may be twice as corrosive as

120°F (49°C) and increase only as

 

water stored at 140°F (60°C)

necessary.

Usage

Each time the burner or elements

Purchasing a proper sized tank will

 

cycle on and off, a small amount

minimize burner or element operation

 

of metal expansion and

when only small quantities of hot water

 

contraction take place. As

are used.

 

bending a piece of wire back and

 

 

forth will break the wire, this

 

 

expansion and contraction will

 

 

eventually crack tank joints or

 

 

welds.

 

For more detailed explanation on this information as well as additional service information, see the A.O. Smith Web site www.hotwater.com under “Technical Information”.

0801 form TC-063

A.O. Smith Water Products Company

48

Training Department

©2002

Ashland City, Tennessee

 

Page 48 Page 50
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Page 48 Page 50
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 Fuel 000Enters Here BTUManifold If … … thenPilot Gas Gas PressureThermocouple output test Procedures/Conditions Electrical TestingSooting causes If … … then Residential Gas Electrical Testing ProceduresIf… … then CondensationCondensation 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 ConditionsResidential Electric Service ProcedureComplaint No Hot Water Conditions Test voltage between 4 and 2 or T2 and L4 If … … thenTest between the two element terminals If … … then Residential Electric Service No Hot WaterComplaint Water Too Hot Conditions Voltage Check Test between 4 and 2 or L4 and T2 If … … thenResidential Electric Service Water Too Hot Test around red wire then black wire to element If … … thenGrounded Element Check Amperage Method Circuit Servicing Complaint No hot water Test Conditions Testing with the MultimeterVoltage Check Test between 1 and 3 or L1 and L3 If … … thenComplaint Lack of Hot Water Conditions Residential Electric Service Voltage Check No Hot WaterTest between high limit 4 and lower thermostat 1 or L4 Test between high limit 4 and lower thermostat 2 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 Voltage Checks Power onTest between upper high limit terminals 1 If … … then Test between upper high limit terminals 2Test 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 General Water HammerEffects FIXMineral 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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