A.O. Smith 3400 - Manual (Page 78)

78
PIPING DIAGRAMS
FIGURE
75.
PRIMAR
Y/SECONDAR
Y PIPING SYSTEM
NOTES: 1.
Preferred piping diagram.
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. However
, local codes shall govern their usage.
4.
The boiler is shown with the optional factory installed and sized secondary boiler pump that is available on all XB models.
XP
BOILERS 1000–3400 -
ONE BOILER PRIMAR
Y / SECONDAR
Y HYDRONIC
PIPING SYSTEM
LEGEND
TEMPERA
TURE & PRESSURE
RELIEF
VA
LV
E
PRESSURE RELIEF
VA
LV
E
CIRCULA
TING PUM
P
TA
NK
TEMPER
AT
URE CONTRO
L
DRAIN
FULL
POR
T
BAL
L
VA
LV
E
TEMPERA
TURE GAGE
WA
TER 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
.
MODEL
INLET
DIA.
OUTLET
DIA.
XB-1000
2”
2”
XB-1300
2”
2”
XB-1700
2.5”
2.5”
XB-2000
3”
3”
XB-1600
3”
3”
XB-3400
4”
4”
LOOP TEMPERATURE PROB
E
PLACES TEES AS CLOSE TOGETHER AS PRACTICA
L
MAKE-UP WATE
R
AIR SEPARATO
R
SYSTEM SUPPLY
SYSTEM PUMP
SYSTEM RETURN
SECONDARY BOILER PUMP - OPTIONAL
FINISHED FLOOR
EXPANSION TANK