American Water Heater ATO-705-P Benutzerhandbuch
24
Tankless
Tankless
Tankless
Tankless
Drawing Number:
Drawing Date:
Pres
s
ure R
e
lief
Valv
e
3/
4"
Ball
Valv
e
3/
4"
U
n
ion
Ch
e
c
k V
a
lve
Ke
y
S
Pres
s
u
re R
egulat
or
C
irc
ulat
ing Pum
p
Solenoid Valv
e
Boiler D
rain Valv
e
WH-6-RGE
Domestic Hot W
ater - C
ir
cu
la
ti
o
n
S
ys
te
m
s
6 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.
C
o
ld
W
a
te
r
S
u
p
p
ly
L
in
e
Ga
s Supp
ly
Tankless
Wa
ter
Heate
r
Primary
Wa
ter
Heate
r
Sub 1
Wa
ter
Heate
r
Sub 2
Wa
ter
Heate
r
Primary
Wa
ter
Heate
r
Sub 1
Wa
ter
Heate
r
Sub 2
Hot
Water Supply Line
Smaller Return Line
Can Be Used After
The Last Fixture
Expansion Tank
(Optional) Header Sized One
Pipe
Size Larger Than Hot
Water Supply Line - (
To e
liminate c
old
water sa
ndwic
h effec
t
cau
s
ed b
y
frequ
ent
On/Off op
eration)
Gas or Electric
Tank Water
Heater
Tank Water Heater sized to
maintain circulation loop
tem
p
erature
Pressure
Regulator Set to
5 PSI Below
Street Pressure
Building Outlets
For this application:
Pump should be controlled by
an
Aquastat,
T
imer or Combina-
tion 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. Refer-
ence the section
Pump Sizing
for Circulation
.
Pump to be of bronze or
stainless construction.
A
quastat C
onnec
tion
Tankless
Equipment List
QTY
Tankless
6
W
a
ter Heaters
Electronic Connection *
* Refer to Tankless Accessories
and Model
Applicability for
electronic connection details.
Tankless