18

IMPORTANT!

With electrical power supplied to a Tankless 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.

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,

 

 

 

 

 

 

 

Tankless

 

 

 

 

 

 

 

 

Equipment List

QTY

Vacuum

Outdoor

Outdoor

Outdoor

Outdoor

Outdoor

Outdoor

Tankless Outdoor

6

Breaker

Tankless

Tankless

Tankless

Tankless

Tankless

Tankless

Water Heaters

 

Water Heater

Water Heater

Water Heater

Water Heater

Water Heater

Water Heater

 

 

Primary

Sub 1

Sub 2

Pri mary

Sub 1

Sub 2

Electronic Connection *

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

* Refer to Tankless Accessories

 

 

 

 

 

 

 

and Model Applicability for

 

 

 

 

 

 

 

electronic connection details.

 

 

 

 

 

 

 

Gas Supply Line

 

 

 

 

Pressure Regulator

 

 

 

NOTE:

 

 

 

 

Set to 5 PSI Below

 

 

 

 

 

 

 

Street Pressure

 

 

 

 

 

 

 

 

 

 

 

 

a pipe enclosure or recess box and

 

 

 

 

 

 

 

packed with insulation for additional

 

 

 

 

 

 

 

protection.

 

Cold Water Supply Line

S

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

1/4 “ Minimum

 

Normally Open

S

Solenoid Valve

 

Route drain per local codes

NOTE:

outside building structure. These are indicated by being above the dashed line.

line should be located inside the building structure.

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

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

Drawing Number:

WH-6-D

Drawing Date:

February 27, 2008

Domestic Hot Water - Optional Freeze Protection

6 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

SSolenoid Valve

Page 18
Image 18
American Water Heater GTS-505-PI, ATO-505-N, ATI-705-N, ATI-505-P, ATI-305-N, ATO-305-P, ATI-305-P, ATI-705A-P, ATI-705A-N WH-6-D

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

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