A.O. Smith Boiler 2000 User Manual

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80
PIPING DIAGRAMS
FIGURE 78. PRIMARY/SECONDARY 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 PRIMARY / SECONDARY HYDRONIC
PIPING SYSTEM
LEGEND
TEMPERATURE & PRESSURE
RELIEF VALVE
PRESSURE RELIEF VALVE
CIRCULATING PUMP
TANK TEMPERATURE CONTROL
DRAIN
FULL PORT BALL VALVE
TEMPERATURE GAGE
WATER FLOW SWITCH
CHECK VALVE
WARNING: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND OTHER DEVICES;
CHECK WITH LOCAL CODES AND ORDINANCES
FOR ADDITIONAL 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 PROBE
PLACES TEES AS CLOSE TOGETHER AS PRACTICAL
MAKE-UP
WATER
AIR SEPARATOR
SYSTEM SUPPLY
SYSTEM PUMP
SYSTEM RETURN
SECONDARY BOILER PUMP - OPTIONAL
FINISHED FLOOR
EXPANSION
TANK

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