Service, Ignition Module System | A.O. Smith BTI 120 guide

7.Lower container, you may have to place the container on its empty carton to prevent the UN•LIME from flowing back into the container.

8.Let UN•LIME remain in the heater for 5 minutes and then lower the container to the "Drain" Position, see Figure 16.

9.Deliming activity is indicated by foaming on the surface of the UN•LIME. If there is deliming activity, repeat steps 6 thru 8.

Normally, lime removal will be completed within one hour. Severe build-up of lime may take longer than an hour to complete descaling.

Note: To check UN•LIME for continued use, place some scale or white chalk in a glass with a small amount of UN•LIME. If the material is vigorously dissolved by the UN•LIME, it can be reused; if not, the UN•LIME should be replaced.

FIGURE 16

the appliance. The indicator codes on the ignition module are as follows:

1 flash	System lockout (retries or cycles exceeded)

2 flashes	Pressure switch stuck close

3 flashes	Pressure switch stuck open

4 flashes	Open on high temperature limit switch (eco)

6 flashes	115 volt AC power reversed (check polarity)

7 flashes	Low flame sense signal (make sure flame
	sensor is in burner flame)

8 flashes	Check ignitor

continuous flash -> continuous flame sensed > 5 seconds without gas valve

continuous on -> internal control failure - replace ignition control module.

Use this diagnostic system in conjunction with the “OPERATIONAL CHECKLIST” and the “SEQUENCE OF OPERATION” to troubleshoot the appliance.

SERVICE

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.

As preliminary step, check wiring against diagram, check for grounded, broken or loose wires. Check all wire ends to be sure that they are making good contact.

IGNITION MODULE SYSTEM

Before calling your service agent, the following checklist should be examined to eliminate obvious problems from those requiring replacement or servicing.

—Check that “main manual gas shutoff valve” is fully open and that gas service has not been interrupted.

—Check that after following the appliance OPERATING INSTRUCTIONS, the “Top Knob” of the appliance gas valve is in “ON” position.

—Check electrical supply to the appliance for possible blown (or tripped) fusing or power interruption.

—Is the water temperature in tank below the thermostat dial setting on the appliance thermostat (calling for heat)?

—It is possible that the high limit (E.C.O.) has functioned to shut off the appliance. See FEATURES — Water Temperature Control for reset procedure. Contact your serviceman if limit continues to function to shut off appliance.

ELECTRICAL SERVICING

CAUTION

LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS. WIRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS OPERATION.

VERIFY PROPER OPERATION AFTER SERVICING.

REPLACEMENT PARTS

Replacement parts may be ordered through A.O. Smith dealers, authorized servicers or distributors. Refer to the Yellow Pages for where to call or contact the A.O. Smith Water Products Company, Product Service Division, 5621 West 115th Street, Alsip, IL 60803, 1-800- 433-2545. When ordering parts be sure to state the quantity, part number and description of the item(s) including the complete model and serial number as it appears on the product. Refer to the parts list for more information.

SYSTEM DIAGNOSTICS

Your water heater is equipped with an ignition module that
incorporates a diagnostic system to assist in troubleshooting	REPLACEMENT PARTS

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.