A.O. Smith TC-049-R2 manual Not Enough HOT Water GAS, Test

Page 56

RESIDENTIAL GAS AND ELECTRIC WATER HEATER

SERVICE HANDBOOK

TECHNICAL BULLETIN

BULLETIN 35

NOT ENOUGH HOT WATER - GAS

CAUSE

Not enough hot water complaints are becoming more frequent in the water heater industry. This increase was triggered when changes required by our regulatory agencies were implemented. For example, heaters are now factory preset at a lower temperature and inlet tubes have been shortened. While lower temperatures settings reduce the burn rate, and shorter dip tubes guard against stacking, both affect the amount of hot water a water heater can supply. The following test will help determine if a water heater is supplying the intended amount of hot water and will help pinpoint any problems that exist.

TEST

Please read all the steps of the test prior to beginning. If you feel uncomfortable

 

performing any of these steps, contact a service person to conduct this test for you.

 

 

STEP 1

At the faucet nearest to the water heater, time (in seconds) how long it takes to fill a

 

1 gallon bucket (flow rate).

 

 

Gallon per minute (gpm) = 60 seconds / seconds to fill a 1 gallon bucket

 

If the bucket fills in: 10 sec = 6 gpm

 

 

12 sec = 5 gpm

 

 

15 sec = 4 gpm

 

 

20 sec = 3 gpm

 

 

24 sec = 2.5 gpm

 

STEP 2

Turn thermostat dial on the water heater so the arrow points to “A” position.

STEP 3

Run about 15 gallons of hot water from the nearest faucet. Shut water off.

STEP 4

Water heater should complete heating 15 gallons in approximately 20-35 minutes.

STEP 5

At a nearby faucet using a candy thermometer, measure the hot water temperature.

STEP 6

The temperature should fall between 120°F to 140°F.

STEP 7

Continue running the hot water until 60% of the tank capacity is depleted:

 

CAPACITY

DEPLETE

 

30 gallons

18 gallons

 

40 gallons

24 gallons

 

50 gallons

30 gallons

 

75 gallons

45 gallons

 

100 gallons

60 gallons

STEP 8

At the same faucet using a candy thermometer, measure the water temperature.

STEP 9

The temperature should be about 30°F below the temperature in step 6.

THE FIX

Step 6 - if the temperature was not within range, check the thermostat. Step 9 - if more than 30 °F was lost, check the dip tube.

A.O. Smith Water Products Company

55

Training Department

©2002

Ashland City, Tennessee

 

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Page 55 Page 57
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 000 FuelEnters Here BTUIf … … then ManifoldPilot Gas Gas PressureSooting causes If … … then Electrical TestingThermocouple output test Procedures/Conditions Procedures Residential Gas Electrical TestingIf… … then 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 elementProcedure Residential Electric ServiceComplaint No Hot Water Conditions Test voltage between 4 and 2 or T2 and L4 If … … thenResidential Electric Service No Hot Water Test between the two element terminals If … … thenComplaint Water Too Hot Conditions 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 Testing with the Multimeter Complaint No hot water Test ConditionsVoltage Check Test between 1 and 3 or L1 and L3 If … … thenResidential Electric Service Voltage Check No Hot Water Complaint Lack of Hot Water ConditionsTest between high limit 4 and lower thermostat 1 or L4 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 Power on Voltage ChecksTest between upper high limit terminals 1 If … … then 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 Water Hammer GeneralEffects 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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