A.O. Smith BT- 80 Water Potable Heating and Space, Venting, Confined Space, System Connections

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insulation, caulking, vapor barrier, etc.), air for combustion, ventilation and draft hood dilution must be obtained from outdoors. The installation instructions for confined spaces in tightly constructed buildings must be followed to ensure adequate air supply.

CONFINED SPACE

When drawing combustion and dilution air from inside a conventionally constructed building to a confined space, such a space shall be provided with two permanent openings, ONE IN OR WITHIN 12 " (305mm) OF THE ENCLOSURE TOP AND ONE IN OR WITHIN 12" (305mm) OF THE ENCLOSURE BOTTOM. Each opening shall have a free area of at least one square inch per 1000 Btu/Hr (2203mm2/kW) of the total input of all appliances in the enclosure, but not less than 100 square inches (645cm2).

If the confined space is within a building of tight construction, air for combustion, ventilation, and draft hood dilution must be obtained from outdoors. When directly communicating with the outdoors or communicating with the outdoors through vertical ducts, two permanent openings, located in the above manner, shall be provided. Each opening shall have a free area of not less than one square inch per 4000 Btu/Hr (551mm2/kW) of the total input of all appliances in the enclosure. If horizontal ducts are used, each opening shall have a free area of not less than one square inch per 2000 Btu/Hr (1102mm2/kW) of the total input of all appliances in the enclosure.

WATER (POTABLE) HEATING AND SPACE

HEATING

1.All piping components connected to this unit for space heating applications shall be suitable for use with potable water.

2.Toxic chemicals, such as those used for boiler treatment, shall NEVER be introduced into this system.

3.This unit may NEVER be connected to any existing heating system or component(s) previously used with a non-potable water heating appliance.

4.When the system requires water for space heating at temperatures higher than required for domestic water purposes, a tempering valve must be installed, see Figure 4.

CAUTION

A closed system will exist if a check valve (without bypass), pressure reducing valve (without bypass), or a water meter (without bypass) is installed in the cold water line between the water heater and street main (or well).

Excessive pressure may develop in such closed systems, causing premature tank failure or intermittent relief valve operation. This is not a warranty failure. An expansion tank or a similar device is required in the inlet supply line between the appliance and the meter or valve to compensate for the thermal expansion of the water.

SYSTEM CONNECTIONS

The system installation must conform to these instructions and to the local code authority having jurisdiction. Good practice requires that all heavy piping be supported.

VENTING

WARNING

THE INSTRUCTIONS IN THIS SECTION ON VENTING MUST BE FOLLOWED TO AVOID CHOKED COMBUSTION OR RECIRCULATION OF FLUE GASES. SUCH CONDITIONS CAUSE SOOTING OR RISKS OF FIRE AND ASPHYXIATION.

Heater must be protected from freezing downdrafts.

Remove all soot or other obstructions from the chimney that will retard a free draft.

Type B venting is recommended with these heaters.

This water heater must be vented in compliance with all local codes, the current edition of the National Fuel Gas Code ANSI-Z223.1 or the Natural Gas and Propane Installation Code CAN/CSA-B149.1.

If any part of the vent system is exposed to ambient temperatures below 35° F (2° C) it must be insulated to prevent condensation.

•Do not connect the heater to a common vent or chimney with any oil-fired or solid fuel burning equipment. This practice is prohibited by many local building codes as is the practice of venting gas fired equipment to the duct work of ventilation systems.

FIGURE 2.

DRAFT HOOD

The draft hood furnished with this heater must be installed without alteration. Provision must be made if it is installed in confined space or a small room to accommodate draft hood spillage and avoid risks described in previous steps. The upper air opening called for in the AIR REQUIREMENTS section of this manual is for this purpose.

Locate the 3 brackets and 6 screws in the installation instruction bag. Secure each bracket to the draft hood leg with the screws furnished. Place the draft hood on the water heater so that legs of the draft hood fit into the slots on the jacket top, see Figure 3. Once the draft hood (with brackets attached) is in place, drill a small pilot hole through bracket hole into the jacket top. WARNING, DO NOT PENETRATE THE JACKET TOP BY MORE THAN 1/4". Secure the brackets to the jacket top with the screws furnished, see Figure 3.

FIGURE 3.

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Contents Installation Operation Service Maintenance Limited Warranty Commercial GAS Water HeaterDimensions Recovery RatingsTable of Contents Installation Instructions Hard Water High Altitude InstallationsClearances AIR RequirementsConfined Space Water Potable Heating and SpaceVenting System ConnectionsRelief Valve Vent ConnectionGAS Piping and Dirt LEG Installation GAS Meter Size GAS PipingGAS Pressure Regulator To Operate the Water HeaterPurging Page For Your Safety Read Before Lighting What to do if YOU Smell GASTemperature Regulation Check VentingPilot and Main Burner Service InformationHigh Temperature Limit Switch Checking GAS InputHOT Water Odor Replacement PartsVent System Anode ROD InspectionPreventive Maintenance Tank Cleanout ProcedureDeliming Solvents Checklist Water Heater Makes Sounds Model BT Limited Warranty Page Smith Water Products Company

BT- 80 specifications

A.O. Smith BT-80 is a notable model in the realm of water heater technology, representing a confluence of efficiency, durability, and advanced engineering. As an industry leader, A.O. Smith has designed this model with the end-user in mind, focusing on delivering a reliable and long-lasting water heating solution suitable for residential and light commercial applications.

One of the standout features of the BT-80 is its impressive 80-gallon capacity, which makes it ideal for households with high hot water demands. Whether it's for daily showers, laundry, or dishwashing, this water heater can accommodate the needs of larger families or homes that require a consistent supply of hot water throughout the day.

The BT-80 utilizes a high-efficiency burner that maximizes energy use, ensuring that less fuel is consumed while providing consistent heating performance. This feature not only reduces utility costs for the homeowner but also reinforces A.O. Smith's commitment to environmentally friendly solutions. Additionally, the water heater is equipped with an insulated tank that minimizes heat loss, further improving its efficiency.

Safety and reliability are key characteristics of the BT-80. It comes with advanced safety features, including a pressure relief valve that prevents excess pressure build-up, ensuring safe operation at all times. The product is also designed for easy maintenance, with accessibility features that allow users or technicians to perform routine checks and repairs conveniently.

This model incorporates cutting-edge technology such as the company's Blue Diamond® glass coating, which provides superior corrosion resistance. This protective feature extends the lifespan of the tank, making it an excellent investment for homeowners.

Moreover, the BT-80 is built to meet stringent industry standards, ensuring it not only performs well but also complies with local codes. Its robust construction means it can withstand various water conditions while maintaining efficiency.

In summary, the A.O. Smith BT-80 is an exemplary water heating solution characterized by its large capacity, energy-efficient operation, advanced safety features, and durable design. It is an ideal choice for customers seeking a reliable and efficient way to meet their hot water needs. With A.O. Smith's reputable engineering and commitment to quality, the BT-80 is a worthy consideration for anyone in the market for a new water heater.
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