A.O. Smith COF, COBT, BTPN Replacement Parts, Water Heater Makes Noise, Water Leakage is Suspected

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WATER HEATER MAKES NOISE

1.Sediment or lime scale accumulations cause noises when the heater is operating.

•The sounds are normal, however, the tank bottom should be cleaned. Refer to MAINTENANCE for details.

2.Some of the electrical components of the water heater make sounds, which are normal.

•Contacts click or snap as the heater starts and stops.

•Transformers often hum.

WATER LEAKAGE IS SUSPECTED

1.Check to see if the water heater drain valve is tightly closed. Also check the cleanout-opening plug for leakage.

2.The apparent leakage may be condensation, which forms on cool surfaces of the heater and piping.

3.If the outlet of the relief valve is leaking it may represent:

•Excessive water pressure.

•Excessive water temperature.

•Faulty relief valve.

Excessive water pressure is the most common cause of relief valve leakage. It is often caused by a “closed system”. If a check valve is in the inlet system it will not permit the expanded hot water volume to equalize pressure with the main. The relief valve must release this water or the water heater or plumbing system will be damaged.

When such a condition is encountered, local codes or inspection agency should be consulted to determine which system is acceptable in your area. These may consist of:

•Installation of a second relief valve with lower setting than the primary relief valve.

•An expansion tank of suitable size and pressure rating and provision to avoid water logging.

REPLACEMENT PARTS

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

REPLACEMENT PARTS

For additional troubleshooting information, refer to the power burner manual.

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Contents Asme Table of Contents ForewordIdentification General Safety Information Required Ability FeaturesInstallation Instructions Water Temperature ControlAIR Requirements Locating the HeaterLeveling ClearancesVenting Vent ConnectorBarometric Draft Control Assembly Thermal Expansion Closed SystemWater Line Connections Relief ValveGAS Piping GAS Pressure Regulator WiringPurging GAS Meter Size City Gases onlyTypical Wire Diagram COF, 140 720 Kbtuh Typical Wire Diagram COBT, 140 300 KbtuhFilling TWO Unit Manifold InstallationOperation GeneralSediment Removal MaintenanceFlushing DrainingPower Burner Barometric Draft Control TroubleshootingCleaning FLUES-COF & Cobt only Vent SystemsReplacement Parts Water Heater Makes NoiseWater Leakage is Suspected Model BTP/BTPD/BTPN/COF/COBT Limited Warranty

BTP-140-140, BTPN, BTP-140-140 thru 600-2500, COF, COBT specifications

A.O. Smith, a renowned leader in water heating technology, offers a range of high-efficiency commercial boilers, including the COBT, BTP-140-140 through BTP-600-2500, BTPN, and COF models. Designed to cater to diverse heating needs, these systems are engineered for optimal performance, reliability, and efficiency, making them ideal for various applications, from hospitality to industrial processes.

The A.O. Smith COBT model stands out for its innovative features, such as a fully modulating burner that adjusts output based on demand, enhancing energy efficiency and ensuring consistent comfort. Its compact design allows for easy installation in limited spaces, while robust construction materials ensure longevity. The integrated controls offer real-time monitoring and diagnostics, allowing operators to maintain peak performance and reduce maintenance costs.

The BTP series, particularly the BTP-140-140 through BTP-600-2500, delivers high heating capabilities with a range of output options. These models feature a sophisticated heat exchanger design that maximizes heat transfer efficiency while minimizing energy consumption. The use of dual-fuel capability provides flexibility, allowing users to switch between natural gas and propane, thus enhancing operational resilience. The BTP units are also equipped with advanced modulating burners that adapt to varying load conditions, further optimizing fuel usage.

For applications requiring enhanced performance, the BTPN models offer additional features like integrated pumps and a larger footprint for increased capacity. This makes them ideally suited for high-demand environments where consistent hot water supply is critical. The COF model complements this lineup, focusing on oil-fired applications and delivering reliability across diverse operating conditions.

In terms of technology, A.O. Smith utilizes cutting-edge combustion systems and advanced control technologies that not only enhance efficiency but also meet stringent emission standards. The incorporation of condensing technology in many models enables users to harness latent heat from flue gases, significantly improving overall system efficiency.

Overall, A.O. Smith's COBT, BTP, BTPN, and COF models are engineered with a commitment to quality, efficiency, and user-friendliness. Their reliability, advanced technologies, and versatile applications make them a preferred choice for businesses looking for durable and efficient heating solutions. Whether for commercial or industrial needs, A.O. Smith continues to set the standard for water heating systems.
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