For Storage Tank System Installation

Main Water Supply

CAUTION - PROPERTY DAMAGE HAZARD

The storage tank should be located in an area where leakage of the tank or connections will not result in damage to the area adjacent to the storage tank or to lower floors of the structure. Due to the normal corrosive action of the water, the tank will eventually leak after an extended period of time. Also any external plumbing leak, including those from improper installation, may cause early failure of the tank due to corrosion if not repaired. If the owner/ operator is uncomfortable with making the repair a qualified technician should be contacted. A suitable metal drain pan should be installed under the storage tank as shown below, to help protect the property from damage which may occur from condensate form- ation or leaks in the piping connections or tank. The pan must limit the water level to a maximum depth of 1-3/4” and be two inches wider than the tank and piped to an adequate drain. NOTE: The pan must not restrict combustion air flow. Locate the storage tank near a suitable indoor drain. Outside drains are subject to freezing temperatures which can obstruct the drain line. The piping should be at least 3/4” ID and pitched for proper drainage.

Figure “1”

A suitable metal drain pan should be installed under the storage tank.

1-3/4” max.

At least 2” greater than the storage tank.

Storage Tank

Pipe to an adequate drain

Closed System/Thermal Expansion

CAUTION - PROPERTY DAMAGE HAZARD

As water is heated, it expands (thermal expan- sion). In a closed system, the volume of water will grow. As the volume of water grows, there

Figure “2”	Hot Water	In a closed system use a
Typical water	Return Line	thermal expansion tank
Typical water	Return Line
piping installation		Cold Water	Pressure Reducing
		Inlet Valve	Valve with Bypass

will be a corresponding increase in water pres- sure due to thermal expansion. Thermal expan- sion can cause premature tank failure (leakage). This type of failure is not covered under the limited warranty. Thermal expansion can also cause intermittent temperature-pressure relief valve operation: water discharged from the valve due to excessive pressure build up. The temper- ature / pressure relief valve is not intended for the constant relief of thermal expansion. This condition is not covered under the limited war- ranty.

A properly-sized thermal expansion tank should be installed on all closed systems to control the harmful effects of thermal expansion. Contact a local plumbing service agency to have a thermal expansion tank installed.

Hot Water Outlet

Storage

Tank

Metal Drain

Pan 1-3/4”

Depth Max.

Cold Water Supply to Fixture

Temperature and

Pressure Relief Valve

Discharge line

6” Max. above drain

1“ Min.

Drain line 3/4”

ID Min.

Massachusetts:

Drain

Install a vacuum relief

in cold water line per

section 19 MGL 142

705 Series 100, 186965-001, 505 Series 100, 305 Series 100 specifications

A.O. Smith is a leading manufacturer of water heaters and has long been recognized for its commitment to innovation and quality. Among their diverse product lineup, the 305 Series 100, 505 Series 100, 186965-001, and 705 Series 100 models stand out as reliable solutions for both residential and commercial water heating needs.

The A.O. Smith 305 Series 100 is known for its impressive energy efficiency. Utilizing advanced insulation technologies, this model minimizes heat loss, ensuring that water remains heated for longer periods. It features a durable tank construction, often built with glass-coated technology that prevents corrosion and extends the lifespan of the unit. This series also comes equipped with a user-friendly digital thermostat, allowing homeowners to set the desired temperature easily.

On the other hand, the 505 Series 100 emphasizes capacity and performance. Designed to supply hot water for larger households or commercial settings, this model boasts a high recovery rate, which means it can heat water quickly even during peak usage times. Its robust heating element and energy-efficient design ensure significant savings on energy bills, making it a smart investment. This series also includes safety features, such as a thermal relief valve, protecting against overheating.

The A.O. Smith 186965-001 model is particularly notable for its compact design. Ideal for installations with limited space, it does not compromise on performance. This model often includes smart technology, enabling remote monitoring and control via mobile apps. This feature allows users to track water usage, receive maintenance alerts, and manage settings from anywhere, enhancing convenience and ensuring the unit operates at optimal levels.

Lastly, the 705 Series 100 exemplifies versatility and high efficiency. With options for both gas and electric heating, it accommodates a wide range of consumer needs. It incorporates advanced safety elements, such as flame arrestors and high-temperature limit switches, which prioritize user safety. Additionally, the 705 Series is designed for easy installation and maintenance, enabling homeowners to enjoy peace of mind.

In summary, the A.O. Smith 305, 505, 186965-001, and 705 Series 100 all exemplify the brand's dedication to engineering excellence. With their unique features, cutting-edge technologies, and design characteristics, these models cater to various heating needs, delivering reliable hot water solutions for homes and businesses alike.