A.O. Smith BTI-80 Service Information, High Temperature Limit Switch ECO, Main Burner and Igniter

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6.After it has been determined that each appliance connected to the venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas burning appliance to their previous conditions of use.

7.If improper venting is observed during any of the above tests, the venting system must be corrected.

WARNING

FAILURETOCORRECTBACKDRAFTSMAYCAUSEAIRCONTAMINATION ANDUNSAFECONDITIONS.

HIGH TEMPERATURE LIMIT SWITCH (ECO)

The water heater is equipped with a manual reset type high limit (Energy Cutoff) sensor. The high limit switch interrupts the main burner gas flow should the water temperature reach 195°F (90°C). The high limit switch must be manually reset by turning the power to the water heater off for 5 seconds then back on and cannot be reset until the water temperature drops below 120°F (49°C). It is important that a serviceman be called to determine the reason for limit operation and thus avoid repeated thermostat resetting.

WARNING

THE ON/OFF SWITCH MUST HAVE BEEN IN THE OFF POSITION FOR AT LEAST 5 MINUTES. This waiting period is an important safety step. Its purpose is to permit gas that may have accumulated in the combustion chamber to clear. IF YOU DETECT GAS ODOR AT THE END OF THIS PERIOD DO NOT PROCEED WITH LIGHTING. RECOGNIZE THAT GAS ODOR, EVEN IF IT SEEMS WEAK, MAY INDICATE PRESENCE OF ACCUMULATED GAS SOMEPLACE INTHEAREAWITH RISK OF FIRE OR EXPLOSION. SEETHEFRONTPAGEFORSTEPSTOBETAKEN.

SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL TO SHUT OFF,TURNOFFTHEMANUALGASCONTROLVALVETOTHEAPPLIANCE.

SERVICE INFORMATION

The installer may be able to observe and correct certain problems which may arise when the unit is put into operation. HOWEVER, it is recommended that only qualified servicemen, using appropriate test equipment, be allowed to service the heater.

FOR YOUR SAFETY AND SATISFACTORY OPERATION, IT IS RECOMMENDED THATTHIS HEATER BE CHECKED ONCEAYEAR BYA COMPETENTSERVICEPERSON.

USERSOFTHISAPPLIANCESHOULDBEAWARETHATGASCOMPONENTS WEAROUTOVERAPERIODOFTIME. THEGASCARRYINGCOMPONENTS OFTHISAPPLIANCESHOULDBEINSPECTEDFORPROPEROPERATION PERIODICALLYBYAQUALIFIEDSERVICETECHNICIAN.

MAIN BURNER AND IGNITER

Check main burner (figure 7) at least every 6 months for proper flame characteristics. The main burner should display the following characteristics:

FIGURE 7-MAIN BURNERAND IGNITERASSEMBLY - NATURALGAS

1.Provide complete combustion of gas.

2.Cause rapid ignition and carryover of flame across entire burner.

3.Give reasonably quiet operation during ignition, burning and extinction.

4.Cause no excessive lifting of flames from burner ports.

If preceding burner characteristics are not evident, check for accumulation of lint or other foreign material that restricts or blocks the air openings to the heater or burner.

WARNING

SOOT BUILD-UPINDICATESAPROBLEM THAT REQUIRES CORRECTION BEFOREFURTHERUSE.CONSULTWITHAQUALIFIEDSERVICETECHNICIAN.

Should the main burner or burner air openings require cleaning, remove the burner and clean with a soft brush. Clean main burner orifice with a suitable soft material.

CHECKFORGOODFLOWOFCOMBUSTIONANDVENTILATINGAIRTOTHE UNIT. MAINTAINA CLEAR OPENAREAAROUNDTHE HEATERATALLTIMES. DO NOT STORE COMBUSTIBLES OR FLAMMABLE LIQUIDS NEAR OR AROUNDANAPPLIANCE.

CHECKING GAS INPUT

For appliance installation locations with elevation above 2000 ft.(610m) refer to HIGH ALTITUDE INSTALLATIONS section of this manual for input reduction procedure.

With this heater in operation, determine whether it is receiving the full rated input of gas. This may be done by timing the gas meter and measuring gas pressure with a gauge or manometer. When the heater is operating at full capacity (full gas input) it should consume approximately 1 cubic foot of gas in the time shown in table 6.

TABLE 6

INPUT CHECK TIME REQUIRED TO CONSUME 1 CU. FT. OF GAS

 

Type of

BTU Per

Time Required To Consume

Model

Gas

Cu. Ft.

1 Cu. Ft. of Gas

BTI-80

Natural

1050

47.3 sec.

BTI-100

Natural

1050

37.8 sec.

Use this formula to “clock” the meter. Be sure that other gas consuming appliances are not operating during this interval.

3,600 X H = Btuh

T

T= Time in seconds needed to burn one cubic foot of gas. H = Heating value of gas in Btu’s per cubic foot of gas. Btuh = Actual heater input rate.

Example: (Using BTI-80 heater) T = 47.3 seconds/ft3

H = 1,050 Btu/ft3 (natural gas) Btuh = ?

3,600 X 1,050 = 80,000 Btuh (23.4Kwh)

47.3

Compare the actual input rate to that given on the heater’s rating plate. In the example, the BTI-80’s full input rate should be 80,000 Btuh (23.4 Kwh) for natural gas.

VENT SYSTEM

Examine the venting system every 6 months for obstructions and/or deterioration of vent piping.

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Contents Models BTI-80 Dimensions Model GAS and Electrical Characteristics ModelTOP View Model InputTable of Contents Installation Instructions Clearances Hard WaterAIR Requirements Unconfined SpaceVenting Vent ConnectionCombination Water Potable Heating Space Heating Relief ValveGAS Piping System ConnectionsHeater Wiring Wiring Diagram and Schematic FigurePurging GAS Pressure RegulatorTo Operate the Heater For Your Safety Read Before Operating What to do if YOU Smell GASTemperature Regulation Checking VentingD E F Service Information High Temperature Limit Switch ECOMain Burner and Igniter Checking GAS InputPreventive Maintenance Tank Cleanout Procedure FLO-JUG Method of DelimingChecklist CondensationCathodic PROTECTION-ANODE Troubleshooting Service and RepairGAS and Electric Power are ON,OFF/ON Switch is on Water Heating CycleYellow Flame Or ColorTroubleshooting Water Heater ControlService and Repair Expenses Claim ProcedureTank ALL Other PartsReplacement Parts

BTI-80 specifications

The A.O. Smith BTI-80 is a notable contender in the residential water heater market, renowned for its reliable performance, energy efficiency, and innovative features. Designed with the modern homeowner in mind, this model stands out due to its ability to provide ample hot water while minimizing energy consumption, making it an excellent choice for a variety of home sizes and needs.

At its core, the BTI-80 is a 80-gallon capacity tank water heater, catering to households with higher hot water demand. This large capacity ensures that families can comfortably enjoy long showers, run multiple appliances simultaneously, and meet their everyday hot water requirements without experiencing a dip in temperature. The tank's size makes it particularly suitable for larger families or homes with multiple bathrooms.

One of the most significant advancements in the BTI-80 is its state-of-the-art insulation technology. With its high-density foam insulation, this water heater retains heat more effectively, reducing standby heat loss and ensuring that the water remains hot for longer periods. This efficiency translates directly into savings on energy bills, offering an environmentally friendly solution without compromising performance.

The BTI-80 is equipped with a robust and reliable burner system. The gas burner operates efficiently, designed to heat water quickly while still adhering to safety and environmental standards. Additionally, the unit features a self-diagnostic control system that continuously monitors the operational efficiency of the heater. This technology not only contributes to enhanced safety by flagging potential issues but also allows for preventative maintenance, improving the lifespan of the unit.

Another standout characteristic of the A.O. Smith BTI-80 is its user-friendly interface. With accessible temperature controls and easy-to-read indicators, homeowners can easily adjust settings according to their preferences without any hassle.

Moreover, A.O. Smith’s commitment to quality is evident in the warranty that accompanies the BTI-80. The unit is often backed by a generous warranty period, underscoring the company's confidence in its product's durability and performance.

In conclusion, the A.O. Smith BTI-80 is an exceptional water heater that combines capacity, efficiency, and advanced technology. It is designed for homeowners who prioritize both comfort and sustainability, providing a reliable hot water solution that meets the demands of modern living. With its sophisticated features and consumer-friendly design, the BTI-80 is undoubtedly a top choice in the residential market.
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