American Water Heater Tankless Water Heater System - Manual (Page 29)

29
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-3-B
Domestic Hot W
ater - B
ac
ku
p
S
to
ra
g
e
3 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
W
ater
H
eater
Tankless
W
ater
H
eater
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
er
enc
e the sec
tion on
P
ump Sizing for Stor
age
Tank
Applic
ation
.
Tankless Equipment List
QTY
Tankless Commercial
3
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