American Water Heater ATI-705A-P Benutzerhandbuch

Drawing Number:

Drawing Date:

Pres

s

ure R

e

lief

 Valv

e

3/

4"

 Ball 

Valv

e

3/

4"

 U

n

ion

C

h

ec

k Valv

e

Ke

y

S

Pres

s

ure R

egulat

or

C

irc

ulat

ing Pum

p

Solenoid Valv

e

Boiler D

rain Valv

e

WH-2-RGE

Domestic Hot W

ater - C

ir

cu

la

ti

o

n

 S

ys

te

m

s

2 Tankless W

ater Heaters with Gas or Electric Tank

Preferred Piping Inst

allation

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 

of

ficials before installation.

Expansion T

ank

M

inimum 3/4 

“ C

old 

W

a

ter Supply Line

M

inimum 3/4 

“ Hot 

W

a

ter Supply Line

Building Supply

Ga

s

S

u

p

p

ly

L

in

e

G

as or Elec

tric 

Tank W

a

ter

Heater

21

Impor

tant:

Install r

eturn line to the hot 

supply line as close as possible 

to the R

innai water heater

Pump should be controlled by an 

Aquastat, 

T

imer or Combination 

Aquastat and 

T

imer

.

Pump to be sized to maintain circulation 

loop temperature.

The pump should be sized to overcome the 

pressure loss through the tank water heater

,  

and supply and return plumbing in the 

circulation loop.  Reference the section 

.

Pump to be of bronze or stainless construc-

tion.

Tankless

Equipment List 

QTY

Tankless                          2

W

a

ter Heaters

Electronic Connection *

* Refer to Tankless Accessories 

  and Model 

Applicability for 

  electronic connection details.