42
N
OTES
:
1
.
P
re
ferred
piping
diagram
.
2
.
T
he
t
empera
ture
and
pre
ss
ure
relie
f
valve
se
tt
ing
shall
no
t
exceed
pressure
ra
ting
o
f
any
componen
t
in
t
he
sys
tem
.
3
.
S
ervi
c
e
v
al
v
es
are
s
hown
f
or
ser
v
icing
uni
t.
Howeve
r,
local
codes
shall
govern
t
heir
usage
.
MUL
TI F
LUE (2 UNITS) WITH BOOSTER T
W
O TEMPER
A
TURE
LEGEND
TEMPERA
T
URE & PRESSURE
RELIEF V
A
L
VE
PRESSURE RELIEF V
A
L
VE
CIRCULA
TING PUMP
T
A
NK
T
E
M
PE
R
A
T
URE C
O
N
T
R
O
L
DRAIN
FULL
POR
T
BALL
V
A
L
VE
TEMPERA
T
URE GAGE
W
A
TER FLOW SWITCH
CHECK V
A
L
VE
W
ARNING:
THIS DRA
W
ING SHOWS SUGGESTED
PIPING CONFIGURA
T
ION
AND OTHER DEVICES;
CHECK WITH LOCAL
CODES
AND ORDINANCES
FOR
ADDITIONAL
REQUIREMENTS.
EXPANSION
TANK
BOOSTED
WATER
OUTLET
TYPICAL
BOOSTER
HEATER
PRE-HEATER
PRE-HEATER
MUST BE IDENTICAL HEATERS
FINISHED FLOOR
COLD WATER
SUPPLY
HOT OUTLET
AT STORED
TEMPERATURE
BOOSTER RETURN
(IF USED)
HOT WATE
R
RETURN
PIPE T&P TO
OPEN DRAIN
PIPE T&P TO
OPEN DRAIN
PIPE T&P TO
OPEN DRAIN
