State SBN85 390NE A - Manual (Page 42)

42
N
OTES
:
1.
P
re
ferred
piping
diagram
.
2.
The
tempera
ture
and
pre
ss
ure
relie
f valve
se
tting
shall
no
t exceed
pressure
ra
ting
o
f any
componen
t in
the
sys
tem
.
3.
S
ervi
ce
v
al
ves
are
s
hown
for
ser
vicing
uni
t.
Howeve
r,
local
codes
shall
govern
their
usage
.
MU
LTI FLUE (2 UNITS) TWO TEMPER
ATURE
LEGEND
TEMPER
AT
URE & PRESSURE
RELIEF
VA
LV
E
PRESSURE RELIEF
VA
LV
E
CIRCULA
TING PUMP
TA
NK
T
EM
PE
R
AT
URE C
O
N
TR
O
L
DRAIN
FULL
PO
R
T
BAL
L
VA
LV
E
TEMPER
AT
URE GAGE
W
ATER FLOW SWITC
H
CHECK
VA
LV
E
W
ARNING:
THIS DR
AW
ING SHOWS SUGGESTED
PIPING CONFIGUR
AT
ION
AND OTHER DEVICES;
CHECK WITH LOCAL
CODES
AND ORDINANCES
FOR
ADDITIONA
L
REQUIREMENTS
.
BOOSTER WATER RETUR
N
PRE-HEATE
D
WATER TO BOOSTE
R
BOOSTER WATE
R
TO FIXTURE
S
HOT WATE
R
TO FIXTURE
S
EXPANSION TANK
HOT WATE
R
RETURN
COLD WATE
R
SUPPLY
1st HEATER
BOOSTE
R
HEATER