Ke y – American Water Heater Tankless Water Heater System User Manual
Page 27
27
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
u
re R
egulat
or
C
irc
ulat
ing Pum
p
Solenoid Valv
e
Boiler D
rain Valv
e
WH-2-B
Domestic Hot W
ater -
Backup Storage
2 Tankless W
ater Heaters
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.
Tankless
Wa
te
rH
ea
te
r
Tankless
W
ater
H
eater
Se
t water heaters @
20
°F
above storage tank Aquastat
St
orage T
a
nk
(No Burner or
Heating Element)
Submersible
A
quastat
(set @ 20
°F below
Tankless Temperature
Setting)
Ref
erenc
e the sec
tion on
P
ump Sizing for Stor
age
Tank
Applic
ation
.
Tankless
Equipment List
QTY
Tankless Commercial
2
W
a
ter Heaters
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