American Water Heater AGT-705-PE Water Heater User Manual


 
Drawing Number:
Drawing Date:
Pressure Relief Valve
3/4" Ball Valve
3/4" Union
Check Valve
Key
S
Pressure Regulator
Circulating Pump
Solenoid Valve
Boiler Drain Valve
WH-2-R
Domestic Hot Water - Circulation Systems
2 Tankless Water Heaters
Optional Piping Installation
February 27, 2008
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
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.
Gas SupplyLine
Tankless
Water Heater
Primary
Tankless
Water Heater
Sub 1
(Optional)
2-10 Gallon
Storage Tank
(Toeliminate cold water
sandwiche
ect caused by
frequentOn/O
operation)
Expansion Tank
Minimum 3/4 “ Cold
Water Supply Line
Minimum 3/4 “ Hot
Water Supply Line
Building Outlets
22
For this application:
Pump should be controlled by an Aquastat,
Timer or Combination Aquastat and Timer.
Pump to be sized to maintain circulation
loop temperature.
A minimum of 3 GPM flow is recommended
for the circulation system.
The pump should be sized to overcome the
pressure loss through the Tankless water
heater, optional storage tank, and supply
and return plumbing in the circulation loop.
Reference the section Pump Sizing for
Circulation.
Pump to be of bronze or stainless construc-
tion.
Aquastat Connection
Tankless
Equipment List QTY
Tankless 2
Water Heaters
Electronic Connection *
* Refer to Tankless Accessories
and Model Applicability for
electronic connection details.