American Water Heater Tankless Water Heater System - Manual (Page 26)

26
Drawing Number: Drawing Date:
Pres
s
u
re 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-1-B-R
Domestic Hot W
ater -
Backup Storage / Circulation
1 Tankless W
ater Heater
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.
St
orage T
ank
(No Burner or
Heating Element)
Submersible
A
quastat
(set @ 20
°F below
Tankless Temperature
Setting)
Tankless
Wa
te
rH
ea
te
r
Set
@
20°
F above
storage tank Aquastat
Ref
erenc
e the sec
tion on
P
ump Sizing for Stor
age
Tank
Applic
ation
.
Building Circulation P
ump
Tankless Equipment List
QTY
Tankless Commercial
1
W
a
ter Heater
P
ump / A
quastat C
ontr
ol
W
ir
e
C
old
W
a
ter Supply Line
Building Hot
W
a
ter
Supply Line
G
as Supply
Expansion T
ank
Building Hot
W
a
ter
Return Line