72
4.
See Closed Systems and
Thermal Expansion on page 14.
5.
See W
ater Line Connections on page 42.
6.
If
a
pump
is
being
installed
between
a
water
heater
and
storage
tank
or
on
a
building
recirculation loop wire according to Figure 68 on page 67.
7.
If
a
pump
is
being
installed
in
a
recirculation
loop
between
the
water
heater
and
a
commercial dishwasher wire according to Figure 68 or Figure 69 on page 67.
W
ATER PIPING DIAGRAMS
Before installation of water piping review the following:
1.
See Mixing V
alves on page 14.
2.
See Dishwashing Machines on page 14.
3.
See
Temperature-Pressure Relief V
alve on page 15.
TWO WATER HEATERS, SINGLE TEMPERATURE W
ITH BUILDING RECIRCULATION
NOTES:
1.
Preferred piping method
.
2.
The temperature and pressure relief valve setting shall not exceed pressure rating of any component in the system
.
3.
Service valves are shown for servicing unit. Howeve
r, local codes shall govern their usage.
LEGEN
D
TEMPER
AT
URE &
PRESSURE RELIEF
VA
LV
E
PRESSURE RELIEF
VA
LV
E
CIRCULA
TING PUMP
TEMPER
AT
URE CONTRO
L
PROB
E
DRAI
N
FULL
PO
RT
BALL
VA
LV
E
TEMPER
AT
URE GAGE
WA
TER FLOW SWITCH
CHECK
VA
LV
E
W
ARNING
:
THIS DR
AW
ING SHOWS SUGGESTED
PIPING CONFIGURA
TION
AND OTHER DEVICES;
CHECK WITH LOCA
L
CODES
AND ORDINANCES
FOR
ADDITIONA
L
REQUIREMENTS
.
AN
Y
MA
TERIAL, COMPONEN
T
OR VENDOR CHANGE
MUST
HA
VE PRIOR
APPROV
AL
BY
THE
APPLICABLE
PRODUCT
ENGINEERING DE
PA
RT
MEN
T.
FINISHED FLOO
R
HOT WATE
R
RETURN
PIPE T&P TO OPEN DRAIN
PIPE T&P TO OPEN DRAIN
HOT WATE
R
TO FIXTURES
COLD WATE
R
SUPPLY
EXPANSION TAN
K
