Gas Supply Line | A.O. Smith 305 Series 100, 505 Series 100 specification

IMPORTANT!

With electrical power supplied to a on-demand water heater, it will not freeze in enviornments as cold as -300F, when protected from direct wind exposure.

In the event of a power failure at temperatures below freezing, the water heater should be drained of all water to prevent freezing damage.

The unit may be drained manually or through the installation of the Optional solenoid valves as shown.

The electrical connections for the two solenoid valves should be tied to the 120V power terminals provided on the PC Board of the water heater.

When the electrical power to the water heater fails, the cold water supply solenoid valve closes, stopping the flow of water into the heater, and the drain down solenoid valve opens, allowing the water heater and associated piping to drain. Ensure that you run the drain for the solenoids per local codes.

On-Demand
Equipment List	QTY
On-Demand Outdoor	3
Water Heaters

Electronic Connection *

*Refer to On-Demand Accessories and Model Applicability for electronic connection details.

Vacuum
Breaker	Outdoor	Outdoor
	Outdoor	Outdoor
	On-Demand	On-Demand
	Water Heater	Water Heater
	Primary	Sub 1

Outdoor

On-Demand

Water Heater

Sub 2

NOTE:

enclosure or recess box and packed with insulation for additional protection.

	Gas Supply Line
	Normally Closed Solenoid Valve
Hot Water	(Full Size of Cold Water Supply Line)
Supply Line	S
	S
NOTE:	Cold Water Supply Line

outside building structure. These are indicated			1/4 “ Minimum
by being above the dashed line.		S	Normally Open
line should be located inside the building			Solenoid Valve
			Solenoid Valve

structure.	Route drain


The vacuum breaker line should be located inside	per local codes
the building structure.

Domestic Hot Water - Optional Freeze Protection

3 Outdoor On-Demand Water Heater

Preferred Piping Installation

Key

3/4" Ball Valve

3/4" Union

Check Valve

Pressure Relief Valve

Pressure Regulator

Circulating Pump

Boiler Drain Valve

Solenoid Valve

Mixing Valve

NOTE: This drawing is not intended to describe a complete system and is not a replacement for a pro- fessional engineering drawing. It is intended only as a guide and does not imply compliance with local building code requirements. Confer with local building officials before installation. The Contractor or engineer is to determine the necessary components and configuration of the particular system to be in- stalled. It is the responsibility of the engineer or contractor to ensure that the installation is in accordance with all local building codes.

Drawing Date:

September 07, 2008

Drawing Number:

H-3-E

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.