57
FIGURE
39.
ZONE PUMPING/ HORIZONT
AL
BUFFER T
ANK HEA
TING SYSTEM
EX
PANSION
T
ANK
MAKE-U
P
W
ATER
ZONE PUMPS
ZONE LOO
P SUPPLIES
ZONE RETURNS
AIR SE
PAR
AT
OR
THERMAL ACCUMUL
AT
OR
(BUFFER
T
ANK)
FINISHED FLOOR
AOS
ST
ORAGE
T
ANK
N
OTES
:
1.
Pre
ferred
piping
layou
t.
2.
The
tempera
ture
and
pres
sure
relie
f valve
se
tting
shall
no
t exceed
pressure
ra
ting
o
f any
componen
t in
the
sys
tem
.
3.
Servi
ce
v
al
ves
are
shown
for
s
ervicing
boile
r.
Howeve
r,
local
codes
shall
govern
their
usage
.
HW
B
URK
AY
BOILER
(30
0-
670)
- ZONE PUMPING/HORIZON
TA
L BUFFER
T
ANK
HE
ATING SYSTEM
LEGEND
TEMPER
ATURE & PRESSURE
RELIEF
VA
LVE
PRESSURE RELIEF
VA
LVE
CIRCUL
ATING PUMP
TE
M
PER
AT
URE
C
O
N
TR
O
L
PR
O
BE
DRAIN
FUL
L PO
R
T BAL
L
VA
LVE
TEMPER
ATURE GAGE
W
ATER FLOW SWITCH
CHECK
VA
LVE
CAUTION:
THIS DR
AWING SHOWS SUGGESTED
PIPING CONFIGUR
ATION
AND OTHER DEVICES;
CHECK WITH LOCA
L CODES
AND ORDINANCES
FOR
ADDITIONA
L REQUIREMENTS.