Installation & Operation Manual
55
8
Domestic water heaters
(continued)
Figure 8-2_Single Water Heater Piping with Two Storage Tanks
COMMON MANIFOLD SIZE (Min.)
Models: 400, 500, 650 & 750
Number of Units
GPM
Diameter
(in.)
15
5
2
COMMON MANIFOLD SIZE (Min.)
Models: 1000, 1250, 1450, 1800 & 2100
Number of Units
GPM
Diameter
(in.)
1
9
0
2
1/2
HOT
W
A
TER
T
O
FIXTURES
AL
TERNA
T
E
LOCA
TION
EXP
ANSION
TA
N
K
COLD W
A
TER
SUPPL
Y
SYSTEM
RETURN
AOS
ST
ORAGE T
A
NK
Finished Floor
NOTES:
1. PREFERRED PIPING LA
YOUT
.
2.
THE
TEMPERA
TURE
AND PRESSURE RELIEF V
A
L
VE SETTING SHALL
NOT
EXCEED PRESSURE RA
TING OF
ANY
COMPONENT
IN
THE SYSTEM.
3. SER
VICE V
A
L
VES
ARE SHOWN FOR SER
VICING W
A
TER HEA
T
ER. HOWEVER, LOCAL
CODES SHALL
GOVERN
THEIR USAGE.
4.
A. O. SMITH PIPING METHOD IS BASED ON 50 EQUIV
ALENT
FEET
OF PIPING. W
A
TER HEA
T
ER PLACEMENT
SHALL
BE
AS CLOSE
AS PRACTICAL
T
O
THE ST
ORAGE
T
A
NK.
APPLICA
TIONS IN EXCESS OF
THESE RECOMMENDA
TIONS
SHALL
REQUIRE
A
LICENSED ENGINEER FOR DESIGN
ASSIST
ANCE.
Please note that these illustrations are meant to show system piping concept only, the installer is responsible
for all equipment and detailing required by local codes.
NOTICE
