A.O. Smith BTI 120 warranty GAS Valves, Checking the Input, Venting System, Relief Valve

Page 26

NOTE:

1.Remove main burners from unit.

2.Check that burner venturi and ports are free of foreign debris.

3.Clean burners with bristle brush and/or vacuum cleaner - DO NOT distort burner ports or pilot location.

4.Reinstall burners in unit. Make sure front and rear of burners are installed correctly in burner support brackets.

Also check for good flow of combustion and ventilating air to the unit. Maintain a clear area around the heater at all times.

GAS VALVES

Figure 14 shows the type of combination manual gas control valve and regulator used on these heaters.

If the gas valve becomes defective, repairs should not be attempted. A new valve should be installed in place of the defective one.

FIGURE 14

CHECKING THE INPUT

For appliance installation locations with elevations above 2000 feet, refer to HIGH ALTITUDE INSTALLATIONS section of this manual for input reduction procedure.

1.Attach a pressure gauge or a manometer to the gauge port and refer to Table 4, for correct manifold pressure.

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

3600 X H = Btuh

T

T = Time in seconds to burn one cubic foot of gas. H = Btu’s per cubic foot of gas.

Btuh = Actual heater input.

Example: (Using BTI-250 heater) T = 15.1 seconds

H = 1050 Btu Btuh = ?

36.8 X 1050 = 250,000 Btuh (Compare with the BTI 250 model and rating.)

Should it be necessary to adjust the gas pressure to the burners to obtain the full input rate, the steps below should be followed:

3.Remove the regulator adjustment sealing cap, fig. 14, and adjust the pressure by turning the adjusting screw with a screwdriver.

Clockwise to increase gas pressure and input rate.

Counterclockwise to decrease gas pressure and input rate.

4.“Clock” the meter as in step 2 above.

5.Repeat steps 3 and 4 until the specified input rate is achieved.

6.Turn the gas control knob to PILOT. Remove the pressure gauge and replace the sealing cap and the allen wrench set screw in the pressure tap opening.

WARNING

UNDER NO CIRCUMSTANCES SHOULD THE GAS INPUT EXCEED THE INPUT SHOWN ON THE HEATER MODEL AND RATING PLATE. OVERFIRING COULD RESULT IN DAMAGE OR SOOTING OF THE HEATER.

When the heater is operating at full capacity, or full gas input, it should consume 1 cu. ft. of gas in time indicated on Table 5.

VENTING SYSTEM

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

Remove all soot or other obstructions from chimney which will retard free draft.

REMOTE STORAGE TANK

TEMPERATURE CONTROL

The water temperature in the storage tank (if used) is controlled by the storage tank temperature control. The sensing element is mounted in the hot water storage tank, see page 16.

A change in water temperature in the storage tank lower than the tank temperature control setting will cause the sensor to activate the circulating pump. The pump then circulates the water through the heater where the thermostat senses the drop in water temperature and activates main burner operation of the appliance. If the storage tank temperature control is out of calibration, replace with new control.

WARNING

SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL TO SHUT OFF, TURN OFF THE MANUAL GAS CONTROL VALVE TO THE APPLIANCE.

RELIEF VALVE

At least once a year, the temperature and pressure relief valve should be checked to ensure that it is in operating condition. Lift the lever at the top of the valve several times until the valve seats properly and operates freely.

26

Page 25 Page 27
Image 26
Page 25 Page 27
Contents Models BTI 120 Thru 400/A Commercial GAS, GLASS-LINED, TANK-TYPE Water HeaterGasand Electrical Characteristics ROUGH-IN-DIMENSIONSFront View TOP View Back View ROUGH-IN-DIMENSIONS Table of Contents ForewordGeneral Safety Information High Limit Switch FeaturesHigh Altitude Installations Circulating Pump Electronic Ignition ControlExhaust Inducer Blower Assy Dishwashing Machine RequirementHard Water LevelingClearances AIR RequirementsVenting Multiple Heater ManifoldModel BTI-154 Type B GAS VentModel BTI-120 Model BTI-310 Model BTI-250Model BTI-275 GAS Piping Water Line ConnectionsWater Potable Heating and Space System ConnectionsGAS Meter Size Natural Gases only GAS Piping and Dirt LEG InstallationGAS Pressure Regulator Type of GASHeater Wiring Single Unit Wiring Diagram BTI-120 Through 400AGeneral Installation DIAGRAMS-TOP INLET/OUTLET UsageTube Inlet Installation Code RestrictionsVertical Storage Tank and Forced Circulation Horizontal Storage Tank and Forced CirculationPage Installation DIAGRAMS-SIDE INLET/OUTLET Usage Circulating Return Line ConnectionHeater with Mixing Valve and Recirculated Sanitizing Loop TWO PRE-HEATERS with Booster Heater Horizontal Storage Tank Model Dimension a Manifold KitsOperation Sequence of Operation For Your Safety Read Before Operating What to do if YOU Smell GASCheck the Ignitor Assembly Preventive MaintenanceWater Temperature Control Ignitor AssemblyChecking the Input Remote Storage Tank Temperature ControlGAS Valves Venting SystemFlushing HOT Water OdorAnode ROD Inspection DrainingDeliming Solvents Tank Cleanout ProcedureDeliming Using FLO-JUG Method System Diagnostics ServiceReplacement Parts Ignition Module SystemSequence of Operation Flow Chart YESRemedy Operational ChecklistComplaint Cause User Serviceman Keepthiswarrantypostedadjacenttotheheaterforfuturereference Service and Repair ExpensesClaim Procedure Tank

BTI 120 specifications

The A.O. Smith BTI 120 is a highly efficient and reliable commercial water heater designed to meet the demanding hot water requirements of larger businesses and institutions. As part of A.O. Smith's BTI series, this model is engineered for performance, durability, and energy efficiency, making it an excellent choice for various commercial applications.

One of the standout features of the BTI 120 is its impressive heating capacity. With a maximum output of 120 gallons per hour, it is well-suited for establishments such as restaurants, hotels, and hospitals, where high volumes of hot water are required to ensure smooth operations. The unit is designed with a robust tank that can accommodate up to 120 gallons of hot water at any given time, ensuring that there is always hot water available for use.

In terms of technology, the A.O. Smith BTI 120 incorporates advanced control systems that allow for precise temperature management. The digital display and control panels provide real-time monitoring of the water temperature, ensuring that it meets the specific needs of the business. Additionally, the system features built-in safety controls to prevent overheating and maintain optimal performance, thereby ensuring safety and efficiency.

Energy efficiency is another critical characteristic of the BTI 120. The unit is designed to minimize energy consumption while maximizing heating efficiency. This is achieved through features such as high-quality insulation and the use of advanced heating elements that deliver hot water more quickly and with less energy wastage. As a result, businesses can benefit from lower operating costs and reduced environmental impact.

Durability is a key aspect of the BTI 120, as it is constructed with high-grade materials that are resistant to corrosion and wear. This ensures a long service life and reduces the need for frequent maintenance and replacements. Furthermore, the unit is designed to operate in various environments and withstand the rigors of continuous use.

In summary, the A.O. Smith BTI 120 is a top-tier commercial water heater that combines performance, efficiency, and durability. With its high heating capacity, advanced control systems, energy-saving features, and robust construction, it is an ideal solution for any business requiring a reliable hot water supply. Choosing the BTI 120 means investing in a product that can enhance operational efficiency and contribute to long-term cost savings.
Top Page Image Contents