A.O. Smith TC-049-R2 manual Water Hammer, General, Effects, Fix

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RESIDENTIAL GAS AND ELECTRIC WATER HEATER

SERVICE HANDBOOK

TECHNICAL BULLETIN

BULLETIN 11

WATER HAMMER

GENERAL

Water hammer is the destructive forces, pounding noises and vibration in a piping system when water flowing through a pipeline is stopped abruptly. When water hammer occurs, a high intensity pressure wave travels back through the piping system until it reaches a point of some relief. The shock wave will then surge back and forth between the point of relief and the point of stoppage until the destructive energy is dissipated in the piping system. The violent action accounts for “banging”, “thumping”, and/or intense vibration in the pipe line. Although noise is generally associated with the occurrence of water hammer, it can occur without audible sound or noise. Quick closure always causes some degree of shock with or without noise. The common cause of water hammer is single lever faucets (sinks/lavatories) or automatic solenoid valves (dishwashers, washing machines, etc.). The speed of the valve closure time is directly related to the intensity of the surge pressure.

EFFECTS

The damage from water hammer can manifest itself in a number of ways. The most common are:

•Expanded Tank Shell - This can be demonstrated by measuring the circumference at various locations along the shell. Pressures in excess of the maximum design working pressure can cause permanent deformation of the shell.

•Collapsed Flue Tube - This will choke off the ability to vent the products of combustion causing the flame and/or combustion to spill out from the combustion chamber. Often this will occur where thinning of the flue tube walls has occurred due to contamination of the combustion air or because of excessive condensation.

•Inverted or Deformed Tank Heads - Often this accompanies collapsed flues, but one or both heads can be deformed.

THE FIX

The only effective means of control is to install water hammer arrestors. These devices have diaphragms, which separate an air chamber from the water in the piping system. As the shock wave reaches this device, the air chamber absorbs the shock. Arrestors should be located as close as possible to the source of the shock wave.

NOTES

Since water hammer exposes the equipment to pressures in excess of its design limits, failures caused by water hammer are not eligible for warranty consideration.

A.O. Smith Water Products Company

49

Training Department

©2002

Ashland City, Tennessee

 

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Page 49 Page 51
Contents Smith Service Handbook Table of Contents Residential GAS and Electric Water HeaterQualifications Tools Required Miscellaneous Information General Section Service GuidelinesFormulas Construction General SectionInstallation of Residential GAS Water Heater Lighting PilotResidental GAS Water Heater Service Construction See also General section of this manualNormal Operation Residential GasService Handbook Setting Approximate Temperature F Time To Cause Injury Enters Here 000Fuel BTUPilot Gas If … … thenManifold Gas PressureSooting causes If … … then Electrical TestingThermocouple output test Procedures/Conditions If… … then ProceduresResidential Gas Electrical Testing CondensationCondensation is a mild acid it will corrode steel Exhaust Venting Notes 125 Standard Residential Electric Water Heaters Construction Heating elementsVoltage Notes Residential ElectricLocation Range F Newer TemperatureSurface Mounted Thermostat s and High Limit s Service Handbook Single Element Single Thermostat Single High Limit Wiring DiagramNormal Sequence of Operation Elements Thermostats High Limit CircuitOperation From cold tank of water Wiring Diagram Operation From cold tank of waterElements Thermostats High Limits Wire Service Handbook Post Cold tank of water Single Electrical Service Single Phase Certification and Approvals Three Phase Unbalanced Circuit WattageElement Test Ohms Resistance Check Test Conditions Test probe on each terminal of an elementComplaint No Hot Water Conditions ProcedureResidential Electric Service Test voltage between 4 and 2 or T2 and L4 If … … thenComplaint Water Too Hot Conditions Residential Electric Service No Hot WaterTest between the two element terminals If … … then Voltage Check Test between 4 and 2 or L4 and T2 If … … thenGrounded Element Check Amperage Method Test around red wire then black wire to element If … … thenResidential Electric Service Water Too Hot Circuit Servicing Voltage Check Testing with the MultimeterComplaint No hot water Test Conditions Test between 1 and 3 or L1 and L3 If … … thenTest between high limit 4 and lower thermostat 1 or L4 Residential Electric Service Voltage Check No Hot WaterComplaint Lack of Hot Water Conditions Test between high limit 4 and lower thermostat 2 or L4Service Handbook Prior To Post Testing The A-7 Wiring CircuitSupply wiring may be a See Pages 25 Test probe on each terminal of an element If … … then Test between upper high limit terminals 1 If … … then Power onVoltage Checks Test between upper high limit terminals 2Complaint Lack of Hot Water Test Conditions Test between lower high limit terminal 1 and 3 or L1 and L3Test Condition Test between the terminals of the lower element If … … thenPower on Thermostats are satisfied Volts times Amps = Watts Replacement elementsWatts divided by Volts = Amps Service Handbook Smith Technical Bulletins WHY Water Heater Tanks Leak What Prevention Water Conditions WHY Water Heater Tanks LeakWhat WHY Prevention Effects Water HammerGeneral FIXCause SymptomsMineral BUILD-UP Aluminum Hydroxide If tank is new with no lime build-up to any degreeDiscolored Water TreatmentSmelly Water Chlorination Procedure ProcedureNot Enough HOT Water GAS TestNot Enough HOT Water Electric Thermal Expansion Follow these easy steps to diagnose 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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