Checklist and Service

ABOVEALL,DONOTPLUGTHETEMPERATUREANDPRESSURE RELIEF VALVE. THIS IS NOT A SOLUTION AND CAN CREATE A HAZARDOUS SITUATION.

CIRCULATING PUMP

The water heating system may include a circulating pump. Where used, it should be lubricated as directed by the circulator manufacturer.

LOW EMISSION POWER BURNER

KEEP THE AREA AROUND THE BURNER CLEAR AND FREE OF COMBUSTIBLEMATERIALS,GASOLINEOROTHERFLAMMABLE LIQUIDS OR VAPORS. DO NOT OBSTRUCT BURNER AIR OPENINGS OR VENTILATION GRILLES FOR COMBUSTION AIR. REMOVE LINT ACCUMULATION FROM AIR INTAKE GRILL.

The main burner flame should be visually checked once a year for proper operation. This can be observed through the “peep sight” port on the burner mounting plate. Burner flame should be kept blue.

At least annually, contact a qualified service agency for burner cleaning and other routine maintenance. For burner related Maintenance Schedule, Troubleshooting, Flame Rod, Ignitor, Thermal Cut-Off Switch Replacement Procedures, use burner Operation & Maintenance Manual provided with this heater.

CLEANING FLUES

The following describes how to gain access to the tank flues for cleaning if necessary.

1.Turn off the heater electrical disconnect switch.

2.Remove the vent connector from on top of the heater.

3.Remove the jacket top from the heater by taking out the screws and lifting it off.

4.Remove the insulation from the top of the heater.

5.Remove the inner cover by taking out the pipe collar around the water inlet and outlet nipple.

6.The flue baffles may now be removed by lifting out.

7.Using a wire brush, a nylon brush must not be used, remove soot from flue passages in heater tank.

CAUTION

While cleaning tank flue passages, care must be taken that brush does not come in contact with neither the combustion chamber lining nor the baffle or funnel which are an integral part of the combustion chamber, as damage could occur. The flue passages are 48-1/2” (1,232 mm) long x 3” (76.2 mm) diameter.

8.Upon completion of cleaning, return heater to operation by following this procedure in reverse.

BAROMETRIC DRAFT CONTROL

- FOR BTP MODELS

The heater is equipped with a double acting barometric draft control as shown in Figure 15. The damper gate must pivot freely in the ring guides.

FIGURE 15

To test gate for operation, gently tap gate and observe. DO NOT OIL.

Adjust the number of counter-weight washers on the control to maintain a negative draft of 0.02” to 0.04” w.c. in the venting. See VERTICAL VENTING, page 8.

NOTE THAT THIS CONTROL WILL ONLY BE PRESENT IN A VERTICAL VENT INSTALLATION.

VENT SYSTEM

Examine the vent system every 3 months. Points of inspection are as follows:

1.Check for obstructions and/or deterioration of vent piping and vent hood. Replace immediately where needed.

2.Vent pipe and vent hood screen should be cleaned of foreign material and soot. The screen is located inside the vent hood outlet and is accessible from the outside of the hood. Do not reach inside the vent when the heater is in operation.

3.Check all vent system connections for leakage and re-seal as required using Hi Temp Silicone sealer or equivalent.

INFORMATION

IMPORTANT

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

BE SURE TO TURN OFF THE ELECTRICITY WHENEVER POSSIBLE OR APPROPRIATE WHILE CHECKING EQUIPMENT.

BURNER OPERATIONAL PROBLEMS

1.Refer to TROUBLESHOOTING for comprehensive service information provided with both heater and burner manuals.

NOT ENOUGH OR NO HOT WATER

1.Be certain the electrical disconnect switch serving the water heater is in the ON position

BTP(V)-540A, 650A, 740A specifications

A.O. Smith is renowned for its innovative water heating solutions, and the 650A, 740A, and BTP(V)-540A models exemplify this legacy. These water heaters are designed with advanced technology and feature a range of specifications tailored to meet diverse heating needs.

The A.O. Smith 650A model stands out with its efficient design and high-capacity heating capabilities. It is equipped with a powerful heating element that ensures rapid water heating, allowing consumers to enjoy hot water without long waits. The unit's tank is insulated with durable materials, which minimizes heat loss and enhances energy efficiency. Additionally, it incorporates a glass-lined tank that resists corrosion and extends the lifespan of the water heater, making it a reliable choice for households.

Moving on to the 740A model, this unit is designed for larger applications and can accommodate significant hot water demands. Its advanced heating technology includes an impressive recovery rate, which enables it to supply hot water even during peak usage times. The 740A is also equipped with smart diagnostics that monitor the system's performance, ensuring optimal operation and identifying potential issues before they escalate. This feature enhances user convenience and reduces maintenance costs.

The BTP(V)-540A takes efficiency one step further with its unique heat pump technology. It captures ambient heat from the surroundings to heat water, significantly reducing energy consumption compared to traditional electric water heaters. This eco-friendly model is ideal for those looking to lower their energy bills without sacrificing performance. The BTP(V)-540A also features a user-friendly digital display that allows users to easily adjust settings and monitor performance.

In summary, the A.O. Smith 650A, 740A, and BTP(V)-540A models showcase the brand's commitment to quality, efficiency, and innovation. Each model comes with distinct features tailored to different household requirements. With advanced heating technologies, robust construction, and user-friendly interfaces, these water heaters represent some of the best options available in the market for ensuring a reliable hot water supply. A.O. Smith continues to set the bar high in the water heating industry, making these models a smart investment for any home.