WH-3-D

IMPORTANT!

With electrical power supplied to a Tankles water heater, it will not freeze in enviornments as cold as -30ºF, 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.

Vacuum
Breaker	Outdoor	Outdoor	Outdoor
	Outdoor	Outdoor	Outdoor
	Tankless	Tankless	Tankless
	Water Heater	Water Heater	Water Heater
	Primary	Sub 1	Sub 2

NOTE:

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

Tankless
Equipment	List	QTY
Tankless Outdoor		3
Water Heaters

Electronic Connection *

*Refer to Tankless Accessories and Model Applicability for electronic connection details.

The electrical connections for the two solenoid valves should be tied to the 120 V 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,

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.

Hot Water

Supply Line

NOTE:

outside building structure. These are indicated
by being above the dashed line.		S
line should be located inside the building
line should be located inside the building
structure.	Route drain


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

Gas Supply Line

Normally Closed Solenoid Valve (Full Size of Cold Water Supply Line)

Cold Water Supply Line

1/4 “ Minimum

Normally Open

Solenoid Valve

Drawing Number:

Drawing Date:

February 27, 2008

Domestic Hot Water - Optional Freeze Protection

3 Outdoor Tankless Water Heaters

Preferred Piping Installation

This is not an engineering drawing; it is intended only as a guide and not as a replacement for professional engineering project drawings. This drawing is not intended to describe a complete system. It is up to the

Key

contractor or engineer to determine the necessary components and configuration of the particular system to be installed. The drawing does not imply compliance with local building code requirements. It is the responsibility of the engineer or contractor to ensure that the installation is in accordance with all local building codes. Confer with local building officials before installation.

3/4" Ball Valve

3/4" Union

Check Valve

Pressure Relief Valve

Pressure Regulator

Circulating Pump

Boiler Drain Valve

Solenoid Valve

ATO-705A-P, GT-305-NI, GT-705-NI, ATI-505-N, ATI-705A-N specifications

American Water Heater has long been regarded as a trusted name in the water heating industry, and among its impressive lineup is the ATI-705A-P, GTS-705-PEA, GT-705-PE, GT-305-NE, and GTS-705-NEA models. Each of these units incorporates cutting-edge technologies and design features, ensuring high-performance and energy-efficient water heating solutions for modern households.

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The GT-305-NE model is particularly noteworthy, equipped with a powerful burner that provides consistent hot water supply, making it an excellent choice for larger homes. Its compact design allows for versatile installation options, while still maintaining a large capacity. This model also includes a high-efficiency rating, ensuring energy savings and environmental benefits.

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